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Tue May 10 07:09:21 2005 UTC (9 years, 5 months ago) by azarah
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* sandbox-1.2.6

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

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