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Revision 84 - (hide annotations) (download)
Wed May 11 15:39:13 2005 UTC (9 years, 3 months ago) by azarah
Original Path: trunk/ChangeLog
File size: 19995 byte(s)
Remove USE_SYSTEM_SHELL stuff, as it is not secure, and not in use.

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 83 11 May 2005; Martin Schlemmer <azarah@gentoo.org> sandbox.c, sandbox.h:
6 azarah 84 Remove USE_SYSTEM_SHELL stuff, as it is not secure, and not in use.
7    
8     11 May 2005; Martin Schlemmer <azarah@gentoo.org> sandbox.c, sandbox.h:
9 azarah 83 Remove ld.so.preload crap - we are not going to use it again.
10    
11 azarah 82 10 May 2005; Martin Schlemmer <azarah@gentoo.org> sandbox_futils.c:
12     Fix typo in code that checks if we got valid group information, causing a
13     segmentation fault, bug #91637.
14    
15 azarah 79 * sandbox-1.2.6 (2005/05/10)
16    
17 azarah 78 10 May 2005; Martin Schlemmer <azarah@gentoo.org> sandbox.c:
18     Do not use LD_PRELOAD if it contains libtsocks.so, as it breaks sandbox
19     for some odd reason, bug #91541.
20    
21 azarah 77 09 May 2005; Martin Schlemmer <azarah@gentoo.org> sandbox.c:
22     Fix typo (sizeof -> strlen).
23    
24 ferringb 76 08 May 2005; Brian Harring <ferringb@gentoo.org> libsandbox.c:
25     rewrote the sbcontext caching code so it accounts for env changes since lib
26     initialization.
27    
28 azarah 75 05 May 2005; Martin Schlemmer <azarah@gentoo.org> configure.in, libctest.c:
29     We create libctest.c via configure, so no need to keep it around. Do some
30     cleanup related to libctest.c and libctest during configure.
31    
32 azarah 74 04 May 2005; Martin Schlemmer <azarah@gentoo.org> libsandbox.c:
33     Add rename support of symlinks pointing to protected files/directories.
34    
35 azarah 72 * sandbox-1.2.5 (2005/05/04)
36    
37 azarah 71 04 May 2005; Martin Schlemmer <azarah@gentoo.org> libsandbox.c, sandbox.c,
38     sandbox.bashrc:
39     Do not reset already set LD_PRELOAD when starting sandbox. If LD_PRELOAD is
40     already set, init of the env vars fails for some reason, so do this later on,
41     and do not warn (bug #91431).
42    
43 azarah 70 03 May 2005; Martin Schlemmer <azarah@gentoo.org> sandbox.c, sandbox.h,
44     sandbox.bashrc:
45     Fixup sandbox and sandbox.bashrc to call bash with the proper .bashrc.
46    
47 azarah 68 * sandbox-1.2.4 (2005/05/03)
48    
49 azarah 66 03 May 2005; Martin Schlemmer <azarah@gentoo.org> libsandbox.c:
50     Do not init the env entries with each call, as it creates too many calls to
51 azarah 67 lstat, etc. Should speedup things a bit, bug #91040.
52 azarah 66
53 azarah 65 03 May 2005; Martin Schlemmer <azarah@gentoo.org> sandbox.c:
54     Add /dev/pty to default write list. Noticed by Morfic.
55    
56 vapier 62 02 May 2005; Mike Frysinger <vapier@gentoo.org> configure.in, localdecls.h,
57     sandbox.h:
58     uClibc doesn't support dlvsym() so add a configure check to make sure it doesn't
59     exist. Also update localdecls.h so BROKEN_RTLD_NEXT isn't defined in uClibc.
60    
61 azarah 59 * sandbox-1.2.3 (2005/04/29)
62    
63 azarah 56 29 Apr 2005; Martin Schlemmer <azarah@gentoo.org> configure.in:
64     Do not check for (*&#$(* CXX or F77.
65    
66 azarah 54 29 Apr 2005; Martin Schlemmer <azarah@gentoo.org> libsandbox.c:
67     Do not append '/' to pathname in filter_path() if it already ends with it.
68    
69 vapier 53 28 Apr 2005; Mike Frysinger <vapier@gentoo.org> Makefile.am, configure.in:
70     With az's help, clean up autotools to work with cross-compiling.
71    
72 azarah 59 * sandbox-1.2.2 (2005/04/28)
73 azarah 48
74 azarah 47 28 Apr 2005; Martin Schlemmer <azarah@gentoo.org> libsandbox.c:
75     Only check for /dev/{null,zero} for unlink hack, else ricers using /dev/shm
76     have issues; bug #90592.
77    
78 azarah 59 * sandbox-1.2.1 (2005/04/23)
79 azarah 44
80 azarah 43 23 Apr 2005; Martin Schlemmer <azarah@gentoo.org> Makefile.am, canonicalize.c,
81     getcwd.c, libsandbox.c, localdecls.h, sandbox.h, sandbox_futils.c:
82     Make sure all functions used in libsandbox.c is declared static. Define
83     SB_STATIC in localdecls.h for this. Include sandbox_futils.c rather than
84     linking with its object. Hopefully this will fix bug #90153.
85    
86 azarah 59 * sandbox-1.2 (2005/04/23)
87 azarah 46
88 azarah 40 22 Mar 2005; Martin Schlemmer <azarah@gentoo.org> libsandbox.c:
89     Allow lchown a symlink in write-allowed path pointing to write-denied
90     target.
91    
92 genone 39 21 Mar 2005; Marius Mauch <genone@gentoo.org> libsandbox.c:
93     Also show resolved symlink names in the log.
94    
95 azarah 37 14 Mar 2005; Martin Schlemmer <azarah@gentoo.org> Makefile.am, libsandbox.c:
96     Seems -nostdlib was the problem with the constructor/destructor - remove it
97     from Makefile.am, and change the constructor/destructor names again.
98    
99 azarah 36 14 Mar 2005; Martin Schlemmer <azarah@gentoo.org> libsandbox.c:
100     Also rename the _init() and _fini() declarations.
101    
102 azarah 35 14 Mar 2005; Martin Schlemmer <azarah@gentoo.org> libsandbox.c, sandbox.c:
103     Fixup the constructor/destructor function names again (they should be _init()
104     and _fini() it seems, and not being called caused sandbox_lib_path to be
105     unset, and thus breaking the execve() wrapper's LD_PRELOAD protection).
106     Add both the path in given SANDBOX_x variable, as well as its symlink
107     resolved path in init_env_entries(). Modify filter_path() to be able to
108     resolve paths without resolving symlinks, as well as to be able to resolve
109     symlinks. Fix a possible segfault in check_access(). Add symlink resolving
110     to check_access() resolving bug #31019. Add 'hack' for unlink, as the fix
111     for bug #31019 cause access violations if we try to remove a symlink that is
112     not in protected path, but points to a protected path. Fix a memory leak in
113     sandbox.c (sandbox_pids_file in main()). Fix the realpath() calls in main()
114     (sandbox.c) being unchecked. Fix the debug logname not having the pid in it
115     (pid_string was uninitialized). General syntax cleanups.
116    
117 ferringb 34 09 Mar 2005; Brian Harring <ferringb@gentoo.org> sandbox.c: Fixed the
118     infamous "pids file is not a regular file" w/out newline bug.
119    
120 ferringb 33 09 Mar 2005; Brian Harring <ferringb@gentoo.org> Makefile.am, configure.in:
121     Correct libc_version path detection, since it was screwing up if libdir !=
122     "/lib/".
123    
124     02 Mar 2005; Martin Schlemmer <azarah@gentoo.org> libsandbox.c:
125 azarah 32 Hack to make sure sandboxed process cannot remove a device node, bug #79836.
126    
127 ferringb 33 02 Mar 2005; Martin Schlemmer <azarah@gentoo.org> Makefile.am:
128 azarah 31 Fix symbols.in not added to dist.
129    
130 ferringb 33 02 Mar 2005; Martin Schlemmer <azarah@gentoo.org> Makefile.am, canonicalize.c,
131 azarah 30 getcwd.c, libsandbox.c, sandbox.c, sandbox.h, sandbox_futils.c:
132     White space fixes.
133    
134 ferringb 33 02 Mar 2005; Martin Schlemmer <azarah@gentoo.org> Makefile.am, canonicalize.c,
135 azarah 30 configure.in, getcwd.c, libsandbox.c, symbols.in:
136 azarah 29 Fix inverse test logic in canonicalize.c, use a strncpy. Fix gcc warning in
137     getcwd.c. Add symbols.in and logic to Makefile.am to generate symbol versions
138     for glibc and other libc's that use this. Update libsandbox.c to use these
139     symbol versions if available. Fix exec wrapper to re-export LD_PRELOAD if the
140     process unset it.
141    
142 ferringb 33 01 Mar 2005; Brian Harring <ferringb@gentoo.org> libsandbox.c:
143 ferringb 28 killed off _init and _fini in favor of
144     void __attribute__ ((constructor)) init_func and
145     void __attribute__ ((destructor)) closing_func. _(init|func) were deprecated.
146    
147 ferringb 26 06 Dec 2004; Brian Harring <ferringb@gentoo.org> Makefile.am, libsandbox.c,
148     canonicalize.c, getcwd.c: Fixed compilation *again*. Hopefully cvs is done
149     having the hick-ups.
150    
151 ferringb 24 04 Dec 2004; Brian Harring <ferringb@gentoo.org> libsandbox.c, getcwd.c,
152     Makefile.am: Fixed compilation.
153    
154 ferringb 18 01 Dec 2004; Brian Harring <ferringb@gentoo.org> aclocal.m4:
155     Gutted the bugger so it stops checking for a c++ and fortran compiler.
156     Do *not* regenerate aclocal.m4 for making a release until a better
157     solution is created.
158    
159 ferringb 16 20 Nov 2004; Brian Harring <ferringb@gentoo.org> Makefile.am, sandbox_futils.c:
160     Removal of more hardcoded paths.
161    
162 ferringb 13 20 Nov 2004; Brian Harring <ferringb@gentoo.org> Makefile.am, configure.in,
163     sandbox_futils.c: tweaks to install sandbox.bashrc, and use it.
164    
165     19 Nov 2004; Brian Harring <ferringb@gentoo.org>:
166 ferringb 6 Sandbox is now autotooled, create-localdecls needs to be killed and the code
167     shifted into configure.in. Currently builds *one* libsandbox.so- if multiple
168     are desired (-m64 and -m32 for amd64), the ebuild should do it (imo).
169     To get to a point of testing, automake && autoconf; created requisite files w/
170     a(utomake|clocal)-1.8, and autoconf 2.59. Installs to /usr/, instead of
171     /lib and /usr/lib/portage/bin.
172    
173 ferringb 2 14 Nov 2004; Brian Harring <ferringb@gentoo.org> libsandbox.c, sandbox.c:
174     closing out bug #70225, potential overflow of the sandbox_pids_file var.
175    
176     07 Nov 2004; Brian Harring <ferringb@gentoo.org> libsandbox.c: c99 standard,
177     (think it was at least) allows intermixing of code and data segments. bug #70351
178     should be fixed by this.
179    
180     03 Nov 2004; Brian Harring <ferringb@gentoo.org> libsandbox.c, sandbox_futils.c:
181     futils fix from bug #65201 via solar, and libsandbox log path checks via #69137
182    
183     02 Aug 2004; Nicholas Jones <carpaski@gentoo.org> libsandbox.c: Code from
184     Seth Robertson that tracked down all adjuct flags for read operations that
185     do not invoke a write operation.
186    
187     04 Apr 2004; Nicholas Jones <carpaski@gentoo.org> libsandbox.c, sandbox.c:
188     Another fix from jstubbs regarding a free() on a stack variable for the
189     environment -- tracking now prevents extraneous free()'s segfault.
190    
191     04 Apr 2004; Nicholas Jones <carpaski@gentoo.org> libsandbox.c, sandbox.c:
192     J. Stubbs tracked down a new bug where mkdir was failing to the patch on
193     the lstat in mkdir... it now only returns 0 or -1 as documented for mkdir.
194     Also remove the errno = ESUCCESS settings as documentation points out that
195     a library isn't allowed to do that.
196    
197     04 Apr 2004; Nicholas Jones <carpaski@gentoo.org> libsandbox.c: Added a
198     file_security_check() function to check random potential exploits on files
199     that sandbox is to load and read -- Normally sandboxpids.tmp. This fixes
200     the 'system-crippling' exploits (bug 21923) and catches a few other
201     potential problems.
202    
203     20 Mar 2004; Nicholas Jones <carpaski@gentoo.org> Makefile: Updates for
204     32/64 bit sandbox. Made CC and LD '?=' values to allow passed in CC to work.
205    
206     20 Mar 2004; Nicholas Jones <carpaski@gentoo.org> libsandbox.c:
207     bug 42048 -- Fixed the lstat/errno conditions for mkdir <caleb@g.o>.
208     Added the 64/32 bit sandbox patch for AMD64 bug 32963 <brad/azarah>.
209    
210     29 Feb 2004; Martin Schlemmer <azarah@gentoo.org> sandbox.c, sandbox_futils.c :
211     Fix permissions and group of pids file and logs. Permissions should be 0664
212     and group should be 'portage'. Bug #34260.
213    
214     28 Feb 2004; Martin Schlemmer <azarah@gentoo.org> libsandbox.c :
215     Besides a small cleanup, redo how we replace LD_PRELOAD in the environ passed
216     to the real execve (in our execve wrapper). Seems that on some arches (sparc
217     among others) do not allow us to tamper with the readonly copy passed to
218     execve, so pass our own copy of the environment. Bug #42290.
219    
220     11 Jan 2004; Nicholas Jones <carpaski@gentoo.org> create-decls:
221     Changed tail to head and added a notice about duration of glibc check.
222    
223     21 Dec 2003; Nicholas Jones <carpaski@gentoo.org> create-decls:
224     Changed the glibc subversion check to use /usr/bin/* instead of /bin/sh
225     as there isn't a guarentee that it is dynamic.
226    
227     02 Nov 2003; Martin Schlemmer <azarah@gentoo.org> libsandbox.c :
228     If 'file' passed to before_syscall(const char *func, const char *file) is
229     invalid, we should set errno to ENOENT, and not EINVAL. This should
230     close bug #32238.
231    
232     14 Oct 2003; Martin Schlemmer <azarah@gentoo.org> libsandbox.c :
233     Fix a bug that occurs mainly on 64bit arch, where the file passed to
234     the functions we wrap, is invalid, and then cause canonicalize to pass
235     garbage to before_syscall(), thanks to great detective work from
236     Andrea Luzzardi <al@sig11.org> (bug #29846).
237    
238     13 Oct 2003; Martin Schlemmer <azarah@gentoo.org> create-localdecls :
239     Add a uClibc detection patch from Peter S. Mazinger <ps.m@gmx.net>.
240    
241     13 Oct 2003; Martin Schlemmer <azarah@gentoo.org> libsandbox.c :
242     Fix a bug in libsandbox.c 's checking in the rename wrapper - it basically
243     only checked the destination patch, and not the source, so we could move
244     a protected file to a unprotected directory, and then delete/modify it.
245     Thanks to Andrea Luzzardi (scox) <al@sig11.org>, bug #30992, for this fix.
246    
247     12 Oct 2003; Nicholas Jones <carpaski@gentoo.org> sandbox.c :
248     Added python2.3 to the predict section/variable.
249    
250     28 Sep 2003; Martin Schlemmer <azarah@gentoo.org> libsandbox.c, sandbox.c,
251     sandbox.h, sandbox_futils.c :
252     Add support to set the pids file via SANDBOX_PIDS_FILE at startup. If
253     it is not set, it will revert to its old value.
254    
255     27 Sep 2003; Martin Schlemmer <azarah@gentoo.org> libsandbox.c :
256     Fix our mkdir wrapper to check if the dir exist, and return EEXIST if so,
257     rather than failing with a violation, bug #29748.
258    
259     27 Jul 2003; Martin Schlemmer <azarah@gentoo.org> libsandbox.c :
260     Fix canonicalize() to ignore calls with path = "".
261    
262     27 Jul 2003; Martin Schlemmer <azarah@gentoo.org> getcwd.c, libsandbox.c,
263     sandbox_futils.c, canonicalize.c :
264     Once again coreutils fails, as my systems had 2.5 kernel, the getcwd system
265     call handled strings larger than PATH_MAX (bug #21766). It however does not
266     work the same on 2.4 kernels.
267    
268     To fix, I added the posix implementation of getcwd() (from glibc cvs) that
269     do not need the system call. We use the default getcwd() function via a
270     wrapper (egetcwd), and then lstat the returned path. If lstat fails, it
271     means the current directory was removed, OR that the the system call for
272     getcwd failed (curious is that it do not fail and return NULL or set
273     errno, but rather just truncate the retured directory - usually from the
274     start), and if so, we use the generic getcwd() function (__egetcwd). Note
275     that we do not use the generic version all the time, as it calls lstat()
276     a great number of times, and performance degrade much.
277    
278     29 Jun 2003; Martin Schlemmer <azarah@gentoo.org> create-localdecls,
279     libsandbox.c :
280     Make sure SB_PATH_MAX will not wrap. Fix two possible memory leaks.
281    
282     22 Jun 2003; Martin Schlemmer <azarah@gentoo.org> libsandbox.c, canonicalize.c
283     create-localdecls :
284     When checking path names of files accessed, we need to canonicalize it, else
285     it may be a symlink in a 'write allowed' directory pointing to a file in a
286     directory we should not have write access to.
287    
288     With something like coreutils-5.0, we have two problems:
289     1) One of the tests checks if getcwd() can return a path longer than
290     PATH_MAX. This test then tries to create a dir which even while
291     created local (mkdir("conftest2")), it ends up being resolved with
292     a name that is much larger than PATH_MAX. The problem now is that
293     canonicalize() have undefined behaviour when the path was too long
294     (returned wrongly truncated paths, etc), and pass the wrong path to
295     before_syscall() (causing the bogus sandbox violations).
296     2) The ecanonicalize() function we used, along with the canonicalize()
297     function did not support longer than PATH_MAX. This is partly a
298     cause for 1), but the error checking (rather lack of it) of calls
299     to erealpath() in canonicalize() was the prime reason for 1).
300    
301     As we do not use this canonicalized name to call the function, we resolve this
302     by fixing canonicalize() to do better error checking, and ecanonicalize() as
303     well as all functions in libsandbox.c to use a PATH_MAX of 'PATH_MAX * 2'.
304     While they will resolve paths properly now, and can check if a write/read is
305     allowed, the functions called from the sandboxed environment will still work
306     as expected.
307    
308     This should resolve bug #21766.
309    
310     06 Apr 2003; Martin Schlemmer <azarah@gentoo.org> libsandbox.c :
311     For some reason sandbox fails with a 'open_wr' if you run 'locale -a' under
312     it (bug #16298).
313    
314     Problem is that for some reason locale fopen's locale.alias with mode "rm".
315    
316     -------------------------------------------------------
317     nosferatu root # grep fopen locale.log
318     fopen("/usr/share/locale/locale.alias", "rm"ACCESS DENIED open_wr: /usr/share/locale/locale.alias
319     nosferatu root #
320     --------------------------------------------------------
321    
322     I checked the source of locale, but it have fopen with mode 'r', so
323     not sure where the "rm" mode comes from. Anyhow, changed the check in
324     before_syscall_open_char() to also see mode "rm" as readonly.
325    
326     23 Feb 2003; Martin Schlemmer <azarah@gentoo.org> create-localdecls :
327    
328     Add glibc-2.3 support.
329    
330     22 Feb 2003; Martin Schlemmer <azarah@gentoo.org> sandbox.c :
331    
332     Some /etc/ld.so.preload fixes. Just changed the #if defines to cover all
333     operations releated to preload, as well as only try to modify ld.so.preload
334     if we can. Also modify to write the pid to /tmp/sandboxpids.tmp even when
335     not using ld.so.preload. Fix to not write this instance of sandbox's pid
336     to /tmp/sandboxpids.tmp on exit if this is not the last sandbox running.
337    
338     22 Feb 2003; Nicholas Jones <carpaski@gentoo.org> Makefile :
339    
340     Changed the LD to CC for hppa.
341    
342     22 Feb 2003; Nicholas Jones <carpaski@gentoo.org> create-localdecls :
343    
344     Killed the previous changes I made.
345    
346     17 Feb 2003; Nicholas Jones <carpaski@gentoo.org> create-localdecls :
347    
348     Added parisc to BROKEN_RTLD_ARCHLIST to see if it we can fix the relocation probs.
349    
350     09 Jan 2003; J Robert Ray <jrray@gentoo.org> sandbox.c :
351    
352     Don't segfault if $HOME isn't set, set $HOME to "/" instead. Fixes bug 10868.
353    
354     16 Dec 2002; Martin Schlemmer <azarah@gentoo.org> create-localdecls :
355    
356     Fix memory leak for mips, bug #12236. Thanks to Torgeir Hansen <torgeir@trenger.ro>
357     for this fix.
358    
359     4 Dec 2002; J Robert Ray <jrray@gentoo.org> sandbox.h sandbox_futils.c :
360    
361     sandbox_futils defined a dirname() function that was masking the same
362     function in glibc and was broken (e.g.: SANDBOX_DIR was being set to
363     '/usr/lib/portage/bi/'). Fixed function to return expected results and
364     renamed it to sb_dirname() to no longer mask the glibc function. Closes bug
365     11231.
366    
367     4 Dec 2002; Martin Schlemmer <azarah@gentoo.org> :
368    
369     Fix a segfault in libsandbox.c if canonicalize() was called with
370     first parameter = NULL.
371    
372     1 Sep 2002; Martin Schlemmer <azarah@gentoo.org> :
373    
374     Fix my braindead 'return 1;' in a void function. Updated sandbox.c,
375     cleanup() for this.
376    
377     Change cleanup() in sandbox.c not to exit with fail status if
378     the pidsfile is missing. We really should still display sandbox
379     violations if they occured.
380    
381     31 Aug 2002; Martin Schlemmer <azarah@gentoo.org> :
382    
383     Update cleanup() in sandbox.c to remove the PIDSFILE if this is
384     the last sandbox running.
385    
386     25 Aug 2002; Martin Schlemmer <azarah@gentoo.org> :
387    
388     Major cleanups to mainly libsandbox.c again.
389    
390     22 Aug 2002; Martin Schlemmer <azarah@gentoo.org> :
391    
392     Add copyrights to sandbox.h and sandbox_futils.h. If wrong, the
393     parties involved should please contact me so that we can fix it.
394    
395     Add opendir wrapper to libsandbox.c.
396    
397     21 Aug 2002; Martin Schlemmer <azarah@gentoo.org> :
398    
399     Do some more cleanups to ecanonicalize(), as it dropped filenames in
400     rare cases (after my symlink cleanups), and caused glibc to bork.
401     These fixes went into canonicalize.c.
402    
403     20 Aug 2002; Martin Schlemmer <azarah@gentoo.org> :
404    
405     Fix spawn_shell() and main() in sandbox.c to properly return fail
406     status.
407    
408     19 Aug 2002; Martin Schlemmer <azarah@gentoo.org> :
409    
410     The new canonicalize() function in libsandbox.c also resolved symlinks,
411     which caused on cleaning sandbox errors if the symlink pointed to a
412     file in the live root. Ripped out canonicalize() and realpath() from
413     glibc; removed the symlink stuff, and changed them to ecanonicalize()
414     and erealpath().
415    
416     18 Aug 2002; Martin Schlemmer <azarah@gentoo.org> :
417    
418     Ripped out all the wrappers, and implemented those of InstallWatch.
419     Losts of cleanups and bugfixes. Implement a execve that forces
420     $LIBSANDBOX in $LD_PRELOAD. We can now thus do away with the feared
421     /etc/ld.so.preload (*g*) ... Made the needed changes to sandbox.c,
422     sandbox.h and sandbox_futils.c. Rewrote the Makefile for most
423     parts; it now have an install target.
424    
425     Reformat the whole thing to look somewhat like the reworked sandbox.c
426     and new sandbox.h and sandbox_futils.c from:
427    
428     Brad House <brad@mainstreetsoftworks.com>.
429    
430     Additional Copyrights now due to the InstallWatch code:
431    
432     Copyright (C) 1998-9 Pancrazio `Ezio' de Mauro <p@demauro.net>

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