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Fri Apr 29 13:37:57 2005 UTC (9 years, 4 months ago) by azarah
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sandbox-1.2.3

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

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