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Wed May 4 15:01:12 2005 UTC (9 years, 7 months ago) by azarah
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* sandbox-1.2.5

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

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