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Revision 79 - (show annotations) (download)
Tue May 10 07:09:21 2005 UTC (8 years, 11 months ago) by azarah
File size: 19530 byte(s)
* sandbox-1.2.6

1 # ChangeLog for Path Sandbox
2 # Copyright 1999-2005 Gentoo Foundation; Distributed under the GPL v2
3 # $Header$
4
5 * sandbox-1.2.6 (2005/05/10)
6
7 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 09 May 2005; Martin Schlemmer <azarah@gentoo.org> sandbox.c:
12 Fix typo (sizeof -> strlen).
13
14 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 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 04 May 2005; Martin Schlemmer <azarah@gentoo.org> libsandbox.c:
23 Add rename support of symlinks pointing to protected files/directories.
24
25 * sandbox-1.2.5 (2005/05/04)
26
27 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 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 * sandbox-1.2.4 (2005/05/03)
38
39 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 lstat, etc. Should speedup things a bit, bug #91040.
42
43 03 May 2005; Martin Schlemmer <azarah@gentoo.org> sandbox.c:
44 Add /dev/pty to default write list. Noticed by Morfic.
45
46 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 * sandbox-1.2.3 (2005/04/29)
52
53 29 Apr 2005; Martin Schlemmer <azarah@gentoo.org> configure.in:
54 Do not check for (*&#$(* CXX or F77.
55
56 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 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 * sandbox-1.2.2 (2005/04/28)
63
64 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 * sandbox-1.2.1 (2005/04/23)
69
70 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 * sandbox-1.2 (2005/04/23)
77
78 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 21 Mar 2005; Marius Mauch <genone@gentoo.org> libsandbox.c:
83 Also show resolved symlink names in the log.
84
85 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 14 Mar 2005; Martin Schlemmer <azarah@gentoo.org> libsandbox.c:
90 Also rename the _init() and _fini() declarations.
91
92 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 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 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 Hack to make sure sandboxed process cannot remove a device node, bug #79836.
116
117 02 Mar 2005; Martin Schlemmer <azarah@gentoo.org> Makefile.am:
118 Fix symbols.in not added to dist.
119
120 02 Mar 2005; Martin Schlemmer <azarah@gentoo.org> Makefile.am, canonicalize.c,
121 getcwd.c, libsandbox.c, sandbox.c, sandbox.h, sandbox_futils.c:
122 White space fixes.
123
124 02 Mar 2005; Martin Schlemmer <azarah@gentoo.org> Makefile.am, canonicalize.c,
125 configure.in, getcwd.c, libsandbox.c, symbols.in:
126 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 01 Mar 2005; Brian Harring <ferringb@gentoo.org> libsandbox.c:
133 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 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 04 Dec 2004; Brian Harring <ferringb@gentoo.org> libsandbox.c, getcwd.c,
142 Makefile.am: Fixed compilation.
143
144 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 20 Nov 2004; Brian Harring <ferringb@gentoo.org> Makefile.am, sandbox_futils.c:
150 Removal of more hardcoded paths.
151
152 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 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 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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