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Revision 56 - (hide annotations) (download)
Thu Apr 28 23:43:32 2005 UTC (9 years, 7 months ago) by azarah
File size: 17548 byte(s)
Do not check for (*&#$(* CXX or F77.

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

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