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Revision 164 - (hide annotations) (download)
Sun Sep 4 11:17:09 2005 UTC (8 years, 7 months ago) by azarah
File size: 28633 byte(s)
Also allow symlink() system call to operate on a symlink in a writable path
that points to non-writable path, bug #104711.

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

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