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Revision 78 - (hide annotations) (download)
Tue May 10 07:08:21 2005 UTC (9 years, 7 months ago) by azarah
Original Path: trunk/ChangeLog
File size: 19500 byte(s)
Do not use LD_PRELOAD if it contains libtsocks.so, as it breaks sandbox
for some odd reason, bug #91541.

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

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