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Tue May 3 11:07:38 2005 UTC (9 years, 4 months ago) by azarah
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* sandbox-1.2.4

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

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