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Revision 82 - (hide annotations) (download)
Tue May 10 07:38:49 2005 UTC (9 years, 2 months ago) by azarah
Original Path: trunk/ChangeLog
File size: 19711 byte(s)
Fix typo in code that checks if we got valid group information, causing a
segmentation fault, bug #91637.

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

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