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Revision 172 - (hide annotations) (download)
Mon Nov 28 09:55:54 2005 UTC (10 years, 10 months ago) by azarah
File size: 29325 byte(s)
Check generic getcwd()'s return as well for validity, bug #101728.
1 ferringb 2 # ChangeLog for Path Sandbox
2 vapier 53 # Copyright 1999-2005 Gentoo Foundation; Distributed under the GPL v2
3 ferringb 2 # $Header$
4    
5 azarah 172 28 Nov 2005 Martin Schlemmer <azarah@gentoo.org> getcwd.c:
6    
7     Check generic getcwd()'s return as well for validity, bug #101728.
8    
9 azarah 170 01 Nov 2005; Martin Schlemmer <azarah@gentoo.org> libsandbox.c:
10    
11     Do not pass mode to true_open and true_open64 if not needed. Should fix a
12     segfault in some cases.
13    
14 azarah 169 * sandbox-1.2.13 (2005/09/12)
15 azarah 167
16 azarah 166 12 Sep 2005; Martin Schlemmer <azarah@gentoo.org> sandbox.c, libsandbox.c:
17 azarah 165
18     Do not handle adding working directory to SANDBOX_WRITE, as portage does it
19     itself.
20    
21 azarah 166 Make libsb_fini() do cleanup a bit more complete just in case we get another
22     uClibc 'call preloaded library fini before that of app' issue ... probably
23     will not help much, but we try.
24    
25 azarah 164 04 Sep 2005; Martin Schlemmer <azarah@gentoo.org> libsandbox.c:
26    
27     Also allow symlink() system call to operate on a symlink in a writable path
28     that points to non-writable path, bug #104711.
29    
30 azarah 160 * sandbox-1.2.12 (2005/08/05)
31    
32 azarah 159 05 Aug 2005; Martin Schlemmer <azarah@gentoo.org> libsandbox.c, sandbox.c,
33     sandbox.h:
34 azarah 156
35     Do not give an access violation if the access() system call do not have
36     write/read access - it does not actually modify, so we only need to return
37     not being able to write/read. Noted by Andres Loeh <kosmikus@gentoo.org>,
38     bug #101433.
39    
40 azarah 157 If we are called from the command line, do not care about PORTAGE_TMPDIR,
41     and make the current directory the work directory. Also rename the variable
42     portage_tmp_dir to work_dir.
43    
44 azarah 158 Remove the tmp_dir variable - we do not need it.
45    
46 azarah 159 Improve error handling for get_sandbox_*_envvar() functions.
47    
48 azarah 153 01 Aug 2005; Martin Schlemmer <azarah@gentoo.org> libsandbox.c:
49    
50     Still do normal log if debugging is requested.
51    
52 azarah 154 Add support for SANDBOX_VERBOSE (enabled by default). Adjust SANDBOX_DEBUG
53     to only enable if equal to "1" or "yes".
54    
55 azarah 155 Add /dev/tts to write permit, bug #42809.
56    
57 azarah 152 27 July 2005; Martin Schlemmer <azarah@gentoo.org> sandbox.c, sandbox.h,
58     sandbox_futils.c:
59    
60     Do not resolve symlinks in PORTAGE_TMPDIR in sandbox .. we will handle that
61     in libsandbox .. bug #100309.
62    
63 azarah 151 22 July 2005; Martin Schlemmer <azarah@gentoo.org> sandbox.h:
64    
65     Print all logging to stderr, bug #90343, comment #15, by Zac Medico.
66    
67 azarah 149 * sandbox-1.2.11 (2005/07/14)
68    
69 azarah 148 14 July 2005; Martin Schlemmer <azarah@gentoo.org> getcwd.c:
70     Fix getcwd, bug #98419.
71    
72 azarah 145 08 July 2005; Martin Schlemmer <azarah@gentoo.org> sandbox.c, sandbox_futils.c,
73     libsandbox.c:
74 azarah 146 - Try to cleanup and make error handling/printing consistent.
75     - Remove old logs if present and conflicting with current.
76 azarah 147 - Fix compile error with previous change, and return rather then exit().
77 azarah 145
78 azarah 139 07 July 2005; Martin Schlemmer <azarah@gentoo.org> libsandbox.c, sandbox.c,
79     sandbox.h, sandbox_futils.c:
80     - Fix possible segfault in env init code.
81     - Major cleanup of sandbox_futils.c. Removed most of the functions as we now
82     write to /var/log/sandbox/, so in theory do not need all that.
83 azarah 140 - Redo the interface of the get_* functions so that we do not leak memory.
84 azarah 141 - Remove sandbox_dir and co - we are not using it anymore.
85 azarah 142 - Remove unused includes and variables.
86 azarah 143 - Only declare functions in sandbox_futils.c that are used in libsandbox.c when
87     OUTSIDE_LIBSANDBOX is not defined.
88 azarah 144 - Cleanup access/log printing. Make access printing honour NOCOLOR. Fix log
89     printing's last line not honouring NOCOLOR.
90 azarah 138
91 azarah 134 06 July 2005; Martin Schlemmer <azarah@gentoo.org> sandbox.h, sandbox_futils.c,
92     libsandbox.c:
93     - Change log dir to /var/log/sandbox/. Make sure the sandboxed process cannot
94     write to it.
95 azarah 135 - Clean up logging in libsandbox.c, and hopefully make it more consistant.
96 azarah 136 - Add check_prefixes() with major cleanup on check_access().
97 azarah 137 - Cleanup init_env_entries() and check_prefixes().
98 azarah 134
99 azarah 133 05 July 2005; Martin Schlemmer <azarah@gentoo.org> sandbox.c, sandbox.h,
100     sandbox_futils.c, libsandbox.c:
101     Remove unused 'pids file' code.
102    
103 azarah 128 * sandbox-1.2.10 (2005/07/03)
104    
105 azarah 126 03 July 2005; Martin Schlemmer <azarah@gentoo.org> sandbox.c:
106     Add PREDICT items for nss-db, bug #92079. Patch from Robin Johnson.
107    
108 azarah 123 17 June 2005; Martin Schlemmer <azarah@gentoo.org> sandbox.c:
109     General cleanups:
110     - Remove fooling around with exit codes - we error out on presence of a log
111     anyhow.
112 azarah 124 - Move get_sandbox_*_envvar() to sandbox_setup_environ(), as its more
113     appropriate there.
114 azarah 123
115 azarah 121 12 June 2005; Martin Schlemmer <azarah@gentoo.org> libsandbox.c:
116     Cleanup the fail_nametoolong stuff a bit more.
117    
118 azarah 118 11 June 2005; Martin Schlemmer <azarah@gentoo.org> libsandbox.c:
119 azarah 120 Remove hopefully the last ld.so.preload bits we do not use anymore.
120    
121     11 June 2005; Martin Schlemmer <azarah@gentoo.org> libsandbox.c:
122 azarah 119 Remove the unneeded canonicalize() calls in the wrappers - we do it anyhow
123     in check_syscall(). Should speed things up a bit (at least for the getcwd()
124     and long path name test it goes down to under a second, and not 10+ seconds
125     like before). Also warn if we skip checking due to the canonicalized path
126     being too long.
127    
128     11 June 2005; Martin Schlemmer <azarah@gentoo.org> libsandbox.c:
129 azarah 118 More comment/readability cleanups.
130    
131 azarah 117 10 June 2005; Martin Schlemmer <azarah@gentoo.org> canonicalize.c, getcwd.c,
132     sandbox_futils.c, libsandbox.c:
133     Some strncpy/strncat and other cleanups.
134    
135 azarah 115 * sandbox-1.2.9 (2005/06/09)
136    
137 azarah 114 09 June 2005; Martin Schlemmer <azarah@gentoo.org> libsandbox.c:
138     Move symlink hack down a bit to try and minimize on the amount of lstat()
139     calls we do.
140    
141 azarah 113 09 June 2005; Martin Schlemmer <azarah@gentoo.org> libsandbox.c, sandbox.c:
142     Add hack to allow writing to /proc/self/fd (or /dev/fd), bug #91516.
143    
144 azarah 112 09 June 2005; Martin Schlemmer <azarah@gentoo.org> symbols.in, libsandbox.c:
145     Add wrapper for access() function, bug #85413.
146    
147 azarah 111 09 June 2005; Martin Schlemmer <azarah@gentoo.org> getcwd.c:
148     Use generic getcwd() implementation from uclibc - should be more portable
149     and looks a bit cleaner.
150    
151 azarah 110 09 June 2005; Martin Schlemmer <azarah@gentoo.org> getcwd.c, libsandbox.c:
152     Make sure our true_* pointers are initialized to NULL, and that we check for
153     all references that they are valid.
154    
155 azarah 109 09 June 2005; Martin Schlemmer <azarah@gentoo.org> libsandbox.c:
156     Be default we will fail if the path name we try to canonicalize is too long.
157     This however could cause issues with some things (bug #94630 and #21766), so
158     if fail_nametoolong == 0, canonicalize() will return a null length string and
159     do not fail.
160    
161 azarah 108 08 June 2005; Martin Schlemmer <azarah@gentoo.org> sandbox.c, sandbox_futils.c:
162     Do not abort if TMPDIR is not valid, but rather use '/tmp', bug #94360. Also
163     make sure we re-export the new TMPDIR environment variable.
164    
165 azarah 106 08 June 2005; Martin Schlemmer <azarah@gentoo.org> libsandbox.c:
166     Fix incorrect free of non-malloc'd array, bug #92313 and #94020. Fix noted
167     by Marcus D. Hanwell <cryos@gentoo.org>.
168    
169 azarah 105 08 June 2005; Martin Schlemmer <azarah@gentoo.org> sandbox.c:
170     Add /dev/console to write list, bug #38588.
171    
172 azarah 102 * sandbox-1.2.8 (2005/05/13)
173    
174 azarah 99 13 May 2005; Martin Schlemmer <azarah@gentoo.org> libsandbox.c, sandbox.c,
175 azarah 101 sandbox.h, sandbox_futils.c:
176     General cleanups.
177    
178     13 May 2005; Martin Schlemmer <azarah@gentoo.org> libsandbox.c, sandbox.c,
179 azarah 100 sandbox.h:
180     Various LD_PRELOAD cleanups. Do not unset LD_PRELOAD for parent.
181    
182     13 May 2005; Martin Schlemmer <azarah@gentoo.org> libsandbox.c, sandbox.c,
183 azarah 99 sandbox.h, sandbox_futils.c:
184     Modify get_sandbox_pids_file(), get_sandbox_log() and get_sandbox_debug_log()
185     to use TMPDIR if present in environment.
186    
187 azarah 98 13 May 2005; Martin Schlemmer <azarah@gentoo.org> sandbox.c:
188     Remove sandbox_log_file from main() as its no longer used.
189    
190 azarah 97 13 May 2005; Martin Schlemmer <azarah@gentoo.org> sandbox.c, sandbox.h,
191     sandbox_futils.c:
192     Add get_sandbox_debug_log(), and use it (add behaviour similar to SANDBOX_LOG
193     if already exported when sandbox started). Fix get_sandbox_log() and new
194     get_sandbox_debug_log() to not use already exported environment variables if
195     they have '/' in them. Use snprintf()'s instead of strncpy()'s. More
196     SB_PATH_MAX fixes.
197    
198 azarah 94 * sandbox-1.2.7 (2005/05/12)
199    
200 azarah 93 12 May 2005; Martin Schlemmer <azarah@gentoo.org> sandbox.c, sandbox.h,
201     sandbox_futils.c:
202     More path limit fixes. Declare SB_BUF_LEN global and use it where needed.
203    
204 azarah 92 12 May 2005; Martin Schlemmer <azarah@gentoo.org> sandbox_futils.c:
205     Fix paths limited to 255 chars. Fix get_sandbox_dir() returning a string
206     with '(null)' in it if we did not call sandbox with absolute path.
207    
208 azarah 89 12 May 2005; Martin Schlemmer <azarah@gentoo.org> sandbox.c:
209 azarah 91 Set SANDBOX_ON *before* doing the child's env stuff, else its not set
210     for the child.
211    
212     12 May 2005; Martin Schlemmer <azarah@gentoo.org> sandbox.c:
213 azarah 90 Remove global preload_adaptable as it is no longer used.
214    
215     12 May 2005; Martin Schlemmer <azarah@gentoo.org> sandbox.c:
216 azarah 89 Rewrite environment stuff to only be set when execve'ing the child process
217     to try and avoid issues like bug #91541 that causes sandbox to crash if
218     we set LD_PRELOAD sandbox side already.
219    
220 azarah 87 11 May 2005; Martin Schlemmer <azarah@gentoo.org> sandbox.c:
221 azarah 88 Move print_sandbox_log() up to make things neater.
222    
223     11 May 2005; Martin Schlemmer <azarah@gentoo.org> sandbox.c:
224 azarah 87 Remove load_preload_libs(), as its not used anymore.
225    
226 azarah 83 11 May 2005; Martin Schlemmer <azarah@gentoo.org> sandbox.c, sandbox.h:
227 azarah 86 Remove NO_FORK stuff, as its not used, and 'strace -f' works just fine.
228    
229     11 May 2005; Martin Schlemmer <azarah@gentoo.org> sandbox.c, sandbox.h:
230 azarah 84 Remove USE_SYSTEM_SHELL stuff, as it is not secure, and not in use.
231    
232     11 May 2005; Martin Schlemmer <azarah@gentoo.org> sandbox.c, sandbox.h:
233 azarah 83 Remove ld.so.preload crap - we are not going to use it again.
234    
235 azarah 82 10 May 2005; Martin Schlemmer <azarah@gentoo.org> sandbox_futils.c:
236     Fix typo in code that checks if we got valid group information, causing a
237     segmentation fault, bug #91637.
238    
239 azarah 79 * sandbox-1.2.6 (2005/05/10)
240    
241 azarah 78 10 May 2005; Martin Schlemmer <azarah@gentoo.org> sandbox.c:
242     Do not use LD_PRELOAD if it contains libtsocks.so, as it breaks sandbox
243     for some odd reason, bug #91541.
244    
245 azarah 77 09 May 2005; Martin Schlemmer <azarah@gentoo.org> sandbox.c:
246     Fix typo (sizeof -> strlen).
247    
248 ferringb 76 08 May 2005; Brian Harring <ferringb@gentoo.org> libsandbox.c:
249     rewrote the sbcontext caching code so it accounts for env changes since lib
250     initialization.
251    
252 azarah 75 05 May 2005; Martin Schlemmer <azarah@gentoo.org> configure.in, libctest.c:
253     We create libctest.c via configure, so no need to keep it around. Do some
254     cleanup related to libctest.c and libctest during configure.
255    
256 azarah 74 04 May 2005; Martin Schlemmer <azarah@gentoo.org> libsandbox.c:
257     Add rename support of symlinks pointing to protected files/directories.
258    
259 azarah 72 * sandbox-1.2.5 (2005/05/04)
260    
261 azarah 71 04 May 2005; Martin Schlemmer <azarah@gentoo.org> libsandbox.c, sandbox.c,
262     sandbox.bashrc:
263     Do not reset already set LD_PRELOAD when starting sandbox. If LD_PRELOAD is
264     already set, init of the env vars fails for some reason, so do this later on,
265     and do not warn (bug #91431).
266    
267 azarah 70 03 May 2005; Martin Schlemmer <azarah@gentoo.org> sandbox.c, sandbox.h,
268     sandbox.bashrc:
269     Fixup sandbox and sandbox.bashrc to call bash with the proper .bashrc.
270    
271 azarah 68 * sandbox-1.2.4 (2005/05/03)
272    
273 azarah 66 03 May 2005; Martin Schlemmer <azarah@gentoo.org> libsandbox.c:
274     Do not init the env entries with each call, as it creates too many calls to
275 azarah 67 lstat, etc. Should speedup things a bit, bug #91040.
276 azarah 66
277 azarah 65 03 May 2005; Martin Schlemmer <azarah@gentoo.org> sandbox.c:
278     Add /dev/pty to default write list. Noticed by Morfic.
279    
280 vapier 62 02 May 2005; Mike Frysinger <vapier@gentoo.org> configure.in, localdecls.h,
281     sandbox.h:
282     uClibc doesn't support dlvsym() so add a configure check to make sure it doesn't
283     exist. Also update localdecls.h so BROKEN_RTLD_NEXT isn't defined in uClibc.
284    
285 azarah 59 * sandbox-1.2.3 (2005/04/29)
286    
287 azarah 56 29 Apr 2005; Martin Schlemmer <azarah@gentoo.org> configure.in:
288     Do not check for (*&#$(* CXX or F77.
289    
290 azarah 54 29 Apr 2005; Martin Schlemmer <azarah@gentoo.org> libsandbox.c:
291     Do not append '/' to pathname in filter_path() if it already ends with it.
292    
293 vapier 53 28 Apr 2005; Mike Frysinger <vapier@gentoo.org> Makefile.am, configure.in:
294     With az's help, clean up autotools to work with cross-compiling.
295    
296 azarah 59 * sandbox-1.2.2 (2005/04/28)
297 azarah 48
298 azarah 47 28 Apr 2005; Martin Schlemmer <azarah@gentoo.org> libsandbox.c:
299     Only check for /dev/{null,zero} for unlink hack, else ricers using /dev/shm
300     have issues; bug #90592.
301    
302 azarah 59 * sandbox-1.2.1 (2005/04/23)
303 azarah 44
304 azarah 43 23 Apr 2005; Martin Schlemmer <azarah@gentoo.org> Makefile.am, canonicalize.c,
305     getcwd.c, libsandbox.c, localdecls.h, sandbox.h, sandbox_futils.c:
306     Make sure all functions used in libsandbox.c is declared static. Define
307     SB_STATIC in localdecls.h for this. Include sandbox_futils.c rather than
308     linking with its object. Hopefully this will fix bug #90153.
309    
310 azarah 59 * sandbox-1.2 (2005/04/23)
311 azarah 46
312 azarah 40 22 Mar 2005; Martin Schlemmer <azarah@gentoo.org> libsandbox.c:
313     Allow lchown a symlink in write-allowed path pointing to write-denied
314     target.
315    
316 genone 39 21 Mar 2005; Marius Mauch <genone@gentoo.org> libsandbox.c:
317     Also show resolved symlink names in the log.
318    
319 azarah 37 14 Mar 2005; Martin Schlemmer <azarah@gentoo.org> Makefile.am, libsandbox.c:
320     Seems -nostdlib was the problem with the constructor/destructor - remove it
321     from Makefile.am, and change the constructor/destructor names again.
322    
323 azarah 36 14 Mar 2005; Martin Schlemmer <azarah@gentoo.org> libsandbox.c:
324     Also rename the _init() and _fini() declarations.
325    
326 azarah 35 14 Mar 2005; Martin Schlemmer <azarah@gentoo.org> libsandbox.c, sandbox.c:
327     Fixup the constructor/destructor function names again (they should be _init()
328     and _fini() it seems, and not being called caused sandbox_lib_path to be
329     unset, and thus breaking the execve() wrapper's LD_PRELOAD protection).
330     Add both the path in given SANDBOX_x variable, as well as its symlink
331     resolved path in init_env_entries(). Modify filter_path() to be able to
332     resolve paths without resolving symlinks, as well as to be able to resolve
333     symlinks. Fix a possible segfault in check_access(). Add symlink resolving
334     to check_access() resolving bug #31019. Add 'hack' for unlink, as the fix
335     for bug #31019 cause access violations if we try to remove a symlink that is
336     not in protected path, but points to a protected path. Fix a memory leak in
337     sandbox.c (sandbox_pids_file in main()). Fix the realpath() calls in main()
338     (sandbox.c) being unchecked. Fix the debug logname not having the pid in it
339     (pid_string was uninitialized). General syntax cleanups.
340    
341 ferringb 34 09 Mar 2005; Brian Harring <ferringb@gentoo.org> sandbox.c: Fixed the
342     infamous "pids file is not a regular file" w/out newline bug.
343    
344 ferringb 33 09 Mar 2005; Brian Harring <ferringb@gentoo.org> Makefile.am, configure.in:
345     Correct libc_version path detection, since it was screwing up if libdir !=
346     "/lib/".
347    
348     02 Mar 2005; Martin Schlemmer <azarah@gentoo.org> libsandbox.c:
349 azarah 32 Hack to make sure sandboxed process cannot remove a device node, bug #79836.
350    
351 ferringb 33 02 Mar 2005; Martin Schlemmer <azarah@gentoo.org> Makefile.am:
352 azarah 31 Fix symbols.in not added to dist.
353    
354 ferringb 33 02 Mar 2005; Martin Schlemmer <azarah@gentoo.org> Makefile.am, canonicalize.c,
355 azarah 30 getcwd.c, libsandbox.c, sandbox.c, sandbox.h, sandbox_futils.c:
356     White space fixes.
357    
358 ferringb 33 02 Mar 2005; Martin Schlemmer <azarah@gentoo.org> Makefile.am, canonicalize.c,
359 azarah 30 configure.in, getcwd.c, libsandbox.c, symbols.in:
360 azarah 29 Fix inverse test logic in canonicalize.c, use a strncpy. Fix gcc warning in
361     getcwd.c. Add symbols.in and logic to Makefile.am to generate symbol versions
362     for glibc and other libc's that use this. Update libsandbox.c to use these
363     symbol versions if available. Fix exec wrapper to re-export LD_PRELOAD if the
364     process unset it.
365    
366 ferringb 33 01 Mar 2005; Brian Harring <ferringb@gentoo.org> libsandbox.c:
367 ferringb 28 killed off _init and _fini in favor of
368     void __attribute__ ((constructor)) init_func and
369     void __attribute__ ((destructor)) closing_func. _(init|func) were deprecated.
370    
371 ferringb 26 06 Dec 2004; Brian Harring <ferringb@gentoo.org> Makefile.am, libsandbox.c,
372     canonicalize.c, getcwd.c: Fixed compilation *again*. Hopefully cvs is done
373     having the hick-ups.
374    
375 ferringb 24 04 Dec 2004; Brian Harring <ferringb@gentoo.org> libsandbox.c, getcwd.c,
376     Makefile.am: Fixed compilation.
377    
378 ferringb 18 01 Dec 2004; Brian Harring <ferringb@gentoo.org> aclocal.m4:
379     Gutted the bugger so it stops checking for a c++ and fortran compiler.
380     Do *not* regenerate aclocal.m4 for making a release until a better
381     solution is created.
382    
383 ferringb 16 20 Nov 2004; Brian Harring <ferringb@gentoo.org> Makefile.am, sandbox_futils.c:
384     Removal of more hardcoded paths.
385    
386 ferringb 13 20 Nov 2004; Brian Harring <ferringb@gentoo.org> Makefile.am, configure.in,
387     sandbox_futils.c: tweaks to install sandbox.bashrc, and use it.
388    
389     19 Nov 2004; Brian Harring <ferringb@gentoo.org>:
390 ferringb 6 Sandbox is now autotooled, create-localdecls needs to be killed and the code
391     shifted into configure.in. Currently builds *one* libsandbox.so- if multiple
392     are desired (-m64 and -m32 for amd64), the ebuild should do it (imo).
393     To get to a point of testing, automake && autoconf; created requisite files w/
394     a(utomake|clocal)-1.8, and autoconf 2.59. Installs to /usr/, instead of
395     /lib and /usr/lib/portage/bin.
396    
397 ferringb 2 14 Nov 2004; Brian Harring <ferringb@gentoo.org> libsandbox.c, sandbox.c:
398     closing out bug #70225, potential overflow of the sandbox_pids_file var.
399    
400     07 Nov 2004; Brian Harring <ferringb@gentoo.org> libsandbox.c: c99 standard,
401     (think it was at least) allows intermixing of code and data segments. bug #70351
402     should be fixed by this.
403    
404     03 Nov 2004; Brian Harring <ferringb@gentoo.org> libsandbox.c, sandbox_futils.c:
405     futils fix from bug #65201 via solar, and libsandbox log path checks via #69137
406    
407     02 Aug 2004; Nicholas Jones <carpaski@gentoo.org> libsandbox.c: Code from
408     Seth Robertson that tracked down all adjuct flags for read operations that
409     do not invoke a write operation.
410    
411     04 Apr 2004; Nicholas Jones <carpaski@gentoo.org> libsandbox.c, sandbox.c:
412     Another fix from jstubbs regarding a free() on a stack variable for the
413     environment -- tracking now prevents extraneous free()'s segfault.
414    
415     04 Apr 2004; Nicholas Jones <carpaski@gentoo.org> libsandbox.c, sandbox.c:
416     J. Stubbs tracked down a new bug where mkdir was failing to the patch on
417     the lstat in mkdir... it now only returns 0 or -1 as documented for mkdir.
418     Also remove the errno = ESUCCESS settings as documentation points out that
419     a library isn't allowed to do that.
420    
421     04 Apr 2004; Nicholas Jones <carpaski@gentoo.org> libsandbox.c: Added a
422     file_security_check() function to check random potential exploits on files
423     that sandbox is to load and read -- Normally sandboxpids.tmp. This fixes
424     the 'system-crippling' exploits (bug 21923) and catches a few other
425     potential problems.
426    
427     20 Mar 2004; Nicholas Jones <carpaski@gentoo.org> Makefile: Updates for
428     32/64 bit sandbox. Made CC and LD '?=' values to allow passed in CC to work.
429    
430     20 Mar 2004; Nicholas Jones <carpaski@gentoo.org> libsandbox.c:
431     bug 42048 -- Fixed the lstat/errno conditions for mkdir <caleb@g.o>.
432     Added the 64/32 bit sandbox patch for AMD64 bug 32963 <brad/azarah>.
433    
434     29 Feb 2004; Martin Schlemmer <azarah@gentoo.org> sandbox.c, sandbox_futils.c :
435     Fix permissions and group of pids file and logs. Permissions should be 0664
436     and group should be 'portage'. Bug #34260.
437    
438     28 Feb 2004; Martin Schlemmer <azarah@gentoo.org> libsandbox.c :
439     Besides a small cleanup, redo how we replace LD_PRELOAD in the environ passed
440     to the real execve (in our execve wrapper). Seems that on some arches (sparc
441     among others) do not allow us to tamper with the readonly copy passed to
442     execve, so pass our own copy of the environment. Bug #42290.
443    
444     11 Jan 2004; Nicholas Jones <carpaski@gentoo.org> create-decls:
445     Changed tail to head and added a notice about duration of glibc check.
446    
447     21 Dec 2003; Nicholas Jones <carpaski@gentoo.org> create-decls:
448     Changed the glibc subversion check to use /usr/bin/* instead of /bin/sh
449     as there isn't a guarentee that it is dynamic.
450    
451     02 Nov 2003; Martin Schlemmer <azarah@gentoo.org> libsandbox.c :
452     If 'file' passed to before_syscall(const char *func, const char *file) is
453     invalid, we should set errno to ENOENT, and not EINVAL. This should
454     close bug #32238.
455    
456     14 Oct 2003; Martin Schlemmer <azarah@gentoo.org> libsandbox.c :
457     Fix a bug that occurs mainly on 64bit arch, where the file passed to
458     the functions we wrap, is invalid, and then cause canonicalize to pass
459     garbage to before_syscall(), thanks to great detective work from
460     Andrea Luzzardi <al@sig11.org> (bug #29846).
461    
462     13 Oct 2003; Martin Schlemmer <azarah@gentoo.org> create-localdecls :
463     Add a uClibc detection patch from Peter S. Mazinger <ps.m@gmx.net>.
464    
465     13 Oct 2003; Martin Schlemmer <azarah@gentoo.org> libsandbox.c :
466     Fix a bug in libsandbox.c 's checking in the rename wrapper - it basically
467     only checked the destination patch, and not the source, so we could move
468     a protected file to a unprotected directory, and then delete/modify it.
469     Thanks to Andrea Luzzardi (scox) <al@sig11.org>, bug #30992, for this fix.
470    
471     12 Oct 2003; Nicholas Jones <carpaski@gentoo.org> sandbox.c :
472     Added python2.3 to the predict section/variable.
473    
474     28 Sep 2003; Martin Schlemmer <azarah@gentoo.org> libsandbox.c, sandbox.c,
475     sandbox.h, sandbox_futils.c :
476     Add support to set the pids file via SANDBOX_PIDS_FILE at startup. If
477     it is not set, it will revert to its old value.
478    
479     27 Sep 2003; Martin Schlemmer <azarah@gentoo.org> libsandbox.c :
480     Fix our mkdir wrapper to check if the dir exist, and return EEXIST if so,
481     rather than failing with a violation, bug #29748.
482    
483     27 Jul 2003; Martin Schlemmer <azarah@gentoo.org> libsandbox.c :
484     Fix canonicalize() to ignore calls with path = "".
485    
486     27 Jul 2003; Martin Schlemmer <azarah@gentoo.org> getcwd.c, libsandbox.c,
487     sandbox_futils.c, canonicalize.c :
488     Once again coreutils fails, as my systems had 2.5 kernel, the getcwd system
489     call handled strings larger than PATH_MAX (bug #21766). It however does not
490     work the same on 2.4 kernels.
491    
492     To fix, I added the posix implementation of getcwd() (from glibc cvs) that
493     do not need the system call. We use the default getcwd() function via a
494     wrapper (egetcwd), and then lstat the returned path. If lstat fails, it
495     means the current directory was removed, OR that the the system call for
496     getcwd failed (curious is that it do not fail and return NULL or set
497     errno, but rather just truncate the retured directory - usually from the
498     start), and if so, we use the generic getcwd() function (__egetcwd). Note
499     that we do not use the generic version all the time, as it calls lstat()
500     a great number of times, and performance degrade much.
501    
502     29 Jun 2003; Martin Schlemmer <azarah@gentoo.org> create-localdecls,
503     libsandbox.c :
504     Make sure SB_PATH_MAX will not wrap. Fix two possible memory leaks.
505    
506     22 Jun 2003; Martin Schlemmer <azarah@gentoo.org> libsandbox.c, canonicalize.c
507     create-localdecls :
508     When checking path names of files accessed, we need to canonicalize it, else
509     it may be a symlink in a 'write allowed' directory pointing to a file in a
510     directory we should not have write access to.
511    
512     With something like coreutils-5.0, we have two problems:
513     1) One of the tests checks if getcwd() can return a path longer than
514     PATH_MAX. This test then tries to create a dir which even while
515     created local (mkdir("conftest2")), it ends up being resolved with
516     a name that is much larger than PATH_MAX. The problem now is that
517     canonicalize() have undefined behaviour when the path was too long
518     (returned wrongly truncated paths, etc), and pass the wrong path to
519     before_syscall() (causing the bogus sandbox violations).
520     2) The ecanonicalize() function we used, along with the canonicalize()
521     function did not support longer than PATH_MAX. This is partly a
522     cause for 1), but the error checking (rather lack of it) of calls
523     to erealpath() in canonicalize() was the prime reason for 1).
524    
525     As we do not use this canonicalized name to call the function, we resolve this
526     by fixing canonicalize() to do better error checking, and ecanonicalize() as
527     well as all functions in libsandbox.c to use a PATH_MAX of 'PATH_MAX * 2'.
528     While they will resolve paths properly now, and can check if a write/read is
529     allowed, the functions called from the sandboxed environment will still work
530     as expected.
531    
532     This should resolve bug #21766.
533    
534     06 Apr 2003; Martin Schlemmer <azarah@gentoo.org> libsandbox.c :
535     For some reason sandbox fails with a 'open_wr' if you run 'locale -a' under
536     it (bug #16298).
537    
538     Problem is that for some reason locale fopen's locale.alias with mode "rm".
539    
540     -------------------------------------------------------
541     nosferatu root # grep fopen locale.log
542     fopen("/usr/share/locale/locale.alias", "rm"ACCESS DENIED open_wr: /usr/share/locale/locale.alias
543     nosferatu root #
544     --------------------------------------------------------
545    
546     I checked the source of locale, but it have fopen with mode 'r', so
547     not sure where the "rm" mode comes from. Anyhow, changed the check in
548     before_syscall_open_char() to also see mode "rm" as readonly.
549    
550     23 Feb 2003; Martin Schlemmer <azarah@gentoo.org> create-localdecls :
551    
552     Add glibc-2.3 support.
553    
554     22 Feb 2003; Martin Schlemmer <azarah@gentoo.org> sandbox.c :
555    
556     Some /etc/ld.so.preload fixes. Just changed the #if defines to cover all
557     operations releated to preload, as well as only try to modify ld.so.preload
558     if we can. Also modify to write the pid to /tmp/sandboxpids.tmp even when
559     not using ld.so.preload. Fix to not write this instance of sandbox's pid
560     to /tmp/sandboxpids.tmp on exit if this is not the last sandbox running.
561    
562     22 Feb 2003; Nicholas Jones <carpaski@gentoo.org> Makefile :
563    
564     Changed the LD to CC for hppa.
565    
566     22 Feb 2003; Nicholas Jones <carpaski@gentoo.org> create-localdecls :
567    
568     Killed the previous changes I made.
569    
570     17 Feb 2003; Nicholas Jones <carpaski@gentoo.org> create-localdecls :
571    
572     Added parisc to BROKEN_RTLD_ARCHLIST to see if it we can fix the relocation probs.
573    
574     09 Jan 2003; J Robert Ray <jrray@gentoo.org> sandbox.c :
575    
576     Don't segfault if $HOME isn't set, set $HOME to "/" instead. Fixes bug 10868.
577    
578     16 Dec 2002; Martin Schlemmer <azarah@gentoo.org> create-localdecls :
579    
580     Fix memory leak for mips, bug #12236. Thanks to Torgeir Hansen <torgeir@trenger.ro>
581     for this fix.
582    
583     4 Dec 2002; J Robert Ray <jrray@gentoo.org> sandbox.h sandbox_futils.c :
584    
585     sandbox_futils defined a dirname() function that was masking the same
586     function in glibc and was broken (e.g.: SANDBOX_DIR was being set to
587     '/usr/lib/portage/bi/'). Fixed function to return expected results and
588     renamed it to sb_dirname() to no longer mask the glibc function. Closes bug
589     11231.
590    
591     4 Dec 2002; Martin Schlemmer <azarah@gentoo.org> :
592    
593     Fix a segfault in libsandbox.c if canonicalize() was called with
594     first parameter = NULL.
595    
596     1 Sep 2002; Martin Schlemmer <azarah@gentoo.org> :
597    
598     Fix my braindead 'return 1;' in a void function. Updated sandbox.c,
599     cleanup() for this.
600    
601     Change cleanup() in sandbox.c not to exit with fail status if
602     the pidsfile is missing. We really should still display sandbox
603     violations if they occured.
604    
605     31 Aug 2002; Martin Schlemmer <azarah@gentoo.org> :
606    
607     Update cleanup() in sandbox.c to remove the PIDSFILE if this is
608     the last sandbox running.
609    
610     25 Aug 2002; Martin Schlemmer <azarah@gentoo.org> :
611    
612     Major cleanups to mainly libsandbox.c again.
613    
614     22 Aug 2002; Martin Schlemmer <azarah@gentoo.org> :
615    
616     Add copyrights to sandbox.h and sandbox_futils.h. If wrong, the
617     parties involved should please contact me so that we can fix it.
618    
619     Add opendir wrapper to libsandbox.c.
620    
621     21 Aug 2002; Martin Schlemmer <azarah@gentoo.org> :
622    
623     Do some more cleanups to ecanonicalize(), as it dropped filenames in
624     rare cases (after my symlink cleanups), and caused glibc to bork.
625     These fixes went into canonicalize.c.
626    
627     20 Aug 2002; Martin Schlemmer <azarah@gentoo.org> :
628    
629     Fix spawn_shell() and main() in sandbox.c to properly return fail
630     status.
631    
632     19 Aug 2002; Martin Schlemmer <azarah@gentoo.org> :
633    
634     The new canonicalize() function in libsandbox.c also resolved symlinks,
635     which caused on cleaning sandbox errors if the symlink pointed to a
636     file in the live root. Ripped out canonicalize() and realpath() from
637     glibc; removed the symlink stuff, and changed them to ecanonicalize()
638     and erealpath().
639    
640     18 Aug 2002; Martin Schlemmer <azarah@gentoo.org> :
641    
642     Ripped out all the wrappers, and implemented those of InstallWatch.
643     Losts of cleanups and bugfixes. Implement a execve that forces
644     $LIBSANDBOX in $LD_PRELOAD. We can now thus do away with the feared
645     /etc/ld.so.preload (*g*) ... Made the needed changes to sandbox.c,
646     sandbox.h and sandbox_futils.c. Rewrote the Makefile for most
647     parts; it now have an install target.
648    
649     Reformat the whole thing to look somewhat like the reworked sandbox.c
650     and new sandbox.h and sandbox_futils.c from:
651    
652     Brad House <brad@mainstreetsoftworks.com>.
653    
654     Additional Copyrights now due to the InstallWatch code:
655    
656     Copyright (C) 1998-9 Pancrazio `Ezio' de Mauro <p@demauro.net>

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