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Revision 76 - (show annotations) (download)
Sun May 8 11:27:37 2005 UTC (9 years, 3 months ago) by ferringb
File size: 19232 byte(s)
rewrote sbcontext caching so it accounts for env changes since lib initialization.

1 # ChangeLog for Path Sandbox
2 # Copyright 1999-2005 Gentoo Foundation; Distributed under the GPL v2
3 # $Header$
4
5 08 May 2005; Brian Harring <ferringb@gentoo.org> libsandbox.c:
6 rewrote the sbcontext caching code so it accounts for env changes since lib
7 initialization.
8
9 05 May 2005; Martin Schlemmer <azarah@gentoo.org> configure.in, libctest.c:
10 We create libctest.c via configure, so no need to keep it around. Do some
11 cleanup related to libctest.c and libctest during configure.
12
13 04 May 2005; Martin Schlemmer <azarah@gentoo.org> libsandbox.c:
14 Add rename support of symlinks pointing to protected files/directories.
15
16 * sandbox-1.2.5 (2005/05/04)
17
18 04 May 2005; Martin Schlemmer <azarah@gentoo.org> libsandbox.c, sandbox.c,
19 sandbox.bashrc:
20 Do not reset already set LD_PRELOAD when starting sandbox. If LD_PRELOAD is
21 already set, init of the env vars fails for some reason, so do this later on,
22 and do not warn (bug #91431).
23
24 03 May 2005; Martin Schlemmer <azarah@gentoo.org> sandbox.c, sandbox.h,
25 sandbox.bashrc:
26 Fixup sandbox and sandbox.bashrc to call bash with the proper .bashrc.
27
28 * sandbox-1.2.4 (2005/05/03)
29
30 03 May 2005; Martin Schlemmer <azarah@gentoo.org> libsandbox.c:
31 Do not init the env entries with each call, as it creates too many calls to
32 lstat, etc. Should speedup things a bit, bug #91040.
33
34 03 May 2005; Martin Schlemmer <azarah@gentoo.org> sandbox.c:
35 Add /dev/pty to default write list. Noticed by Morfic.
36
37 02 May 2005; Mike Frysinger <vapier@gentoo.org> configure.in, localdecls.h,
38 sandbox.h:
39 uClibc doesn't support dlvsym() so add a configure check to make sure it doesn't
40 exist. Also update localdecls.h so BROKEN_RTLD_NEXT isn't defined in uClibc.
41
42 * sandbox-1.2.3 (2005/04/29)
43
44 29 Apr 2005; Martin Schlemmer <azarah@gentoo.org> configure.in:
45 Do not check for (*&#$(* CXX or F77.
46
47 29 Apr 2005; Martin Schlemmer <azarah@gentoo.org> libsandbox.c:
48 Do not append '/' to pathname in filter_path() if it already ends with it.
49
50 28 Apr 2005; Mike Frysinger <vapier@gentoo.org> Makefile.am, configure.in:
51 With az's help, clean up autotools to work with cross-compiling.
52
53 * sandbox-1.2.2 (2005/04/28)
54
55 28 Apr 2005; Martin Schlemmer <azarah@gentoo.org> libsandbox.c:
56 Only check for /dev/{null,zero} for unlink hack, else ricers using /dev/shm
57 have issues; bug #90592.
58
59 * sandbox-1.2.1 (2005/04/23)
60
61 23 Apr 2005; Martin Schlemmer <azarah@gentoo.org> Makefile.am, canonicalize.c,
62 getcwd.c, libsandbox.c, localdecls.h, sandbox.h, sandbox_futils.c:
63 Make sure all functions used in libsandbox.c is declared static. Define
64 SB_STATIC in localdecls.h for this. Include sandbox_futils.c rather than
65 linking with its object. Hopefully this will fix bug #90153.
66
67 * sandbox-1.2 (2005/04/23)
68
69 22 Mar 2005; Martin Schlemmer <azarah@gentoo.org> libsandbox.c:
70 Allow lchown a symlink in write-allowed path pointing to write-denied
71 target.
72
73 21 Mar 2005; Marius Mauch <genone@gentoo.org> libsandbox.c:
74 Also show resolved symlink names in the log.
75
76 14 Mar 2005; Martin Schlemmer <azarah@gentoo.org> Makefile.am, libsandbox.c:
77 Seems -nostdlib was the problem with the constructor/destructor - remove it
78 from Makefile.am, and change the constructor/destructor names again.
79
80 14 Mar 2005; Martin Schlemmer <azarah@gentoo.org> libsandbox.c:
81 Also rename the _init() and _fini() declarations.
82
83 14 Mar 2005; Martin Schlemmer <azarah@gentoo.org> libsandbox.c, sandbox.c:
84 Fixup the constructor/destructor function names again (they should be _init()
85 and _fini() it seems, and not being called caused sandbox_lib_path to be
86 unset, and thus breaking the execve() wrapper's LD_PRELOAD protection).
87 Add both the path in given SANDBOX_x variable, as well as its symlink
88 resolved path in init_env_entries(). Modify filter_path() to be able to
89 resolve paths without resolving symlinks, as well as to be able to resolve
90 symlinks. Fix a possible segfault in check_access(). Add symlink resolving
91 to check_access() resolving bug #31019. Add 'hack' for unlink, as the fix
92 for bug #31019 cause access violations if we try to remove a symlink that is
93 not in protected path, but points to a protected path. Fix a memory leak in
94 sandbox.c (sandbox_pids_file in main()). Fix the realpath() calls in main()
95 (sandbox.c) being unchecked. Fix the debug logname not having the pid in it
96 (pid_string was uninitialized). General syntax cleanups.
97
98 09 Mar 2005; Brian Harring <ferringb@gentoo.org> sandbox.c: Fixed the
99 infamous "pids file is not a regular file" w/out newline bug.
100
101 09 Mar 2005; Brian Harring <ferringb@gentoo.org> Makefile.am, configure.in:
102 Correct libc_version path detection, since it was screwing up if libdir !=
103 "/lib/".
104
105 02 Mar 2005; Martin Schlemmer <azarah@gentoo.org> libsandbox.c:
106 Hack to make sure sandboxed process cannot remove a device node, bug #79836.
107
108 02 Mar 2005; Martin Schlemmer <azarah@gentoo.org> Makefile.am:
109 Fix symbols.in not added to dist.
110
111 02 Mar 2005; Martin Schlemmer <azarah@gentoo.org> Makefile.am, canonicalize.c,
112 getcwd.c, libsandbox.c, sandbox.c, sandbox.h, sandbox_futils.c:
113 White space fixes.
114
115 02 Mar 2005; Martin Schlemmer <azarah@gentoo.org> Makefile.am, canonicalize.c,
116 configure.in, getcwd.c, libsandbox.c, symbols.in:
117 Fix inverse test logic in canonicalize.c, use a strncpy. Fix gcc warning in
118 getcwd.c. Add symbols.in and logic to Makefile.am to generate symbol versions
119 for glibc and other libc's that use this. Update libsandbox.c to use these
120 symbol versions if available. Fix exec wrapper to re-export LD_PRELOAD if the
121 process unset it.
122
123 01 Mar 2005; Brian Harring <ferringb@gentoo.org> libsandbox.c:
124 killed off _init and _fini in favor of
125 void __attribute__ ((constructor)) init_func and
126 void __attribute__ ((destructor)) closing_func. _(init|func) were deprecated.
127
128 06 Dec 2004; Brian Harring <ferringb@gentoo.org> Makefile.am, libsandbox.c,
129 canonicalize.c, getcwd.c: Fixed compilation *again*. Hopefully cvs is done
130 having the hick-ups.
131
132 04 Dec 2004; Brian Harring <ferringb@gentoo.org> libsandbox.c, getcwd.c,
133 Makefile.am: Fixed compilation.
134
135 01 Dec 2004; Brian Harring <ferringb@gentoo.org> aclocal.m4:
136 Gutted the bugger so it stops checking for a c++ and fortran compiler.
137 Do *not* regenerate aclocal.m4 for making a release until a better
138 solution is created.
139
140 20 Nov 2004; Brian Harring <ferringb@gentoo.org> Makefile.am, sandbox_futils.c:
141 Removal of more hardcoded paths.
142
143 20 Nov 2004; Brian Harring <ferringb@gentoo.org> Makefile.am, configure.in,
144 sandbox_futils.c: tweaks to install sandbox.bashrc, and use it.
145
146 19 Nov 2004; Brian Harring <ferringb@gentoo.org>:
147 Sandbox is now autotooled, create-localdecls needs to be killed and the code
148 shifted into configure.in. Currently builds *one* libsandbox.so- if multiple
149 are desired (-m64 and -m32 for amd64), the ebuild should do it (imo).
150 To get to a point of testing, automake && autoconf; created requisite files w/
151 a(utomake|clocal)-1.8, and autoconf 2.59. Installs to /usr/, instead of
152 /lib and /usr/lib/portage/bin.
153
154 14 Nov 2004; Brian Harring <ferringb@gentoo.org> libsandbox.c, sandbox.c:
155 closing out bug #70225, potential overflow of the sandbox_pids_file var.
156
157 07 Nov 2004; Brian Harring <ferringb@gentoo.org> libsandbox.c: c99 standard,
158 (think it was at least) allows intermixing of code and data segments. bug #70351
159 should be fixed by this.
160
161 03 Nov 2004; Brian Harring <ferringb@gentoo.org> libsandbox.c, sandbox_futils.c:
162 futils fix from bug #65201 via solar, and libsandbox log path checks via #69137
163
164 02 Aug 2004; Nicholas Jones <carpaski@gentoo.org> libsandbox.c: Code from
165 Seth Robertson that tracked down all adjuct flags for read operations that
166 do not invoke a write operation.
167
168 04 Apr 2004; Nicholas Jones <carpaski@gentoo.org> libsandbox.c, sandbox.c:
169 Another fix from jstubbs regarding a free() on a stack variable for the
170 environment -- tracking now prevents extraneous free()'s segfault.
171
172 04 Apr 2004; Nicholas Jones <carpaski@gentoo.org> libsandbox.c, sandbox.c:
173 J. Stubbs tracked down a new bug where mkdir was failing to the patch on
174 the lstat in mkdir... it now only returns 0 or -1 as documented for mkdir.
175 Also remove the errno = ESUCCESS settings as documentation points out that
176 a library isn't allowed to do that.
177
178 04 Apr 2004; Nicholas Jones <carpaski@gentoo.org> libsandbox.c: Added a
179 file_security_check() function to check random potential exploits on files
180 that sandbox is to load and read -- Normally sandboxpids.tmp. This fixes
181 the 'system-crippling' exploits (bug 21923) and catches a few other
182 potential problems.
183
184 20 Mar 2004; Nicholas Jones <carpaski@gentoo.org> Makefile: Updates for
185 32/64 bit sandbox. Made CC and LD '?=' values to allow passed in CC to work.
186
187 20 Mar 2004; Nicholas Jones <carpaski@gentoo.org> libsandbox.c:
188 bug 42048 -- Fixed the lstat/errno conditions for mkdir <caleb@g.o>.
189 Added the 64/32 bit sandbox patch for AMD64 bug 32963 <brad/azarah>.
190
191 29 Feb 2004; Martin Schlemmer <azarah@gentoo.org> sandbox.c, sandbox_futils.c :
192 Fix permissions and group of pids file and logs. Permissions should be 0664
193 and group should be 'portage'. Bug #34260.
194
195 28 Feb 2004; Martin Schlemmer <azarah@gentoo.org> libsandbox.c :
196 Besides a small cleanup, redo how we replace LD_PRELOAD in the environ passed
197 to the real execve (in our execve wrapper). Seems that on some arches (sparc
198 among others) do not allow us to tamper with the readonly copy passed to
199 execve, so pass our own copy of the environment. Bug #42290.
200
201 11 Jan 2004; Nicholas Jones <carpaski@gentoo.org> create-decls:
202 Changed tail to head and added a notice about duration of glibc check.
203
204 21 Dec 2003; Nicholas Jones <carpaski@gentoo.org> create-decls:
205 Changed the glibc subversion check to use /usr/bin/* instead of /bin/sh
206 as there isn't a guarentee that it is dynamic.
207
208 02 Nov 2003; Martin Schlemmer <azarah@gentoo.org> libsandbox.c :
209 If 'file' passed to before_syscall(const char *func, const char *file) is
210 invalid, we should set errno to ENOENT, and not EINVAL. This should
211 close bug #32238.
212
213 14 Oct 2003; Martin Schlemmer <azarah@gentoo.org> libsandbox.c :
214 Fix a bug that occurs mainly on 64bit arch, where the file passed to
215 the functions we wrap, is invalid, and then cause canonicalize to pass
216 garbage to before_syscall(), thanks to great detective work from
217 Andrea Luzzardi <al@sig11.org> (bug #29846).
218
219 13 Oct 2003; Martin Schlemmer <azarah@gentoo.org> create-localdecls :
220 Add a uClibc detection patch from Peter S. Mazinger <ps.m@gmx.net>.
221
222 13 Oct 2003; Martin Schlemmer <azarah@gentoo.org> libsandbox.c :
223 Fix a bug in libsandbox.c 's checking in the rename wrapper - it basically
224 only checked the destination patch, and not the source, so we could move
225 a protected file to a unprotected directory, and then delete/modify it.
226 Thanks to Andrea Luzzardi (scox) <al@sig11.org>, bug #30992, for this fix.
227
228 12 Oct 2003; Nicholas Jones <carpaski@gentoo.org> sandbox.c :
229 Added python2.3 to the predict section/variable.
230
231 28 Sep 2003; Martin Schlemmer <azarah@gentoo.org> libsandbox.c, sandbox.c,
232 sandbox.h, sandbox_futils.c :
233 Add support to set the pids file via SANDBOX_PIDS_FILE at startup. If
234 it is not set, it will revert to its old value.
235
236 27 Sep 2003; Martin Schlemmer <azarah@gentoo.org> libsandbox.c :
237 Fix our mkdir wrapper to check if the dir exist, and return EEXIST if so,
238 rather than failing with a violation, bug #29748.
239
240 27 Jul 2003; Martin Schlemmer <azarah@gentoo.org> libsandbox.c :
241 Fix canonicalize() to ignore calls with path = "".
242
243 27 Jul 2003; Martin Schlemmer <azarah@gentoo.org> getcwd.c, libsandbox.c,
244 sandbox_futils.c, canonicalize.c :
245 Once again coreutils fails, as my systems had 2.5 kernel, the getcwd system
246 call handled strings larger than PATH_MAX (bug #21766). It however does not
247 work the same on 2.4 kernels.
248
249 To fix, I added the posix implementation of getcwd() (from glibc cvs) that
250 do not need the system call. We use the default getcwd() function via a
251 wrapper (egetcwd), and then lstat the returned path. If lstat fails, it
252 means the current directory was removed, OR that the the system call for
253 getcwd failed (curious is that it do not fail and return NULL or set
254 errno, but rather just truncate the retured directory - usually from the
255 start), and if so, we use the generic getcwd() function (__egetcwd). Note
256 that we do not use the generic version all the time, as it calls lstat()
257 a great number of times, and performance degrade much.
258
259 29 Jun 2003; Martin Schlemmer <azarah@gentoo.org> create-localdecls,
260 libsandbox.c :
261 Make sure SB_PATH_MAX will not wrap. Fix two possible memory leaks.
262
263 22 Jun 2003; Martin Schlemmer <azarah@gentoo.org> libsandbox.c, canonicalize.c
264 create-localdecls :
265 When checking path names of files accessed, we need to canonicalize it, else
266 it may be a symlink in a 'write allowed' directory pointing to a file in a
267 directory we should not have write access to.
268
269 With something like coreutils-5.0, we have two problems:
270 1) One of the tests checks if getcwd() can return a path longer than
271 PATH_MAX. This test then tries to create a dir which even while
272 created local (mkdir("conftest2")), it ends up being resolved with
273 a name that is much larger than PATH_MAX. The problem now is that
274 canonicalize() have undefined behaviour when the path was too long
275 (returned wrongly truncated paths, etc), and pass the wrong path to
276 before_syscall() (causing the bogus sandbox violations).
277 2) The ecanonicalize() function we used, along with the canonicalize()
278 function did not support longer than PATH_MAX. This is partly a
279 cause for 1), but the error checking (rather lack of it) of calls
280 to erealpath() in canonicalize() was the prime reason for 1).
281
282 As we do not use this canonicalized name to call the function, we resolve this
283 by fixing canonicalize() to do better error checking, and ecanonicalize() as
284 well as all functions in libsandbox.c to use a PATH_MAX of 'PATH_MAX * 2'.
285 While they will resolve paths properly now, and can check if a write/read is
286 allowed, the functions called from the sandboxed environment will still work
287 as expected.
288
289 This should resolve bug #21766.
290
291 06 Apr 2003; Martin Schlemmer <azarah@gentoo.org> libsandbox.c :
292 For some reason sandbox fails with a 'open_wr' if you run 'locale -a' under
293 it (bug #16298).
294
295 Problem is that for some reason locale fopen's locale.alias with mode "rm".
296
297 -------------------------------------------------------
298 nosferatu root # grep fopen locale.log
299 fopen("/usr/share/locale/locale.alias", "rm"ACCESS DENIED open_wr: /usr/share/locale/locale.alias
300 nosferatu root #
301 --------------------------------------------------------
302
303 I checked the source of locale, but it have fopen with mode 'r', so
304 not sure where the "rm" mode comes from. Anyhow, changed the check in
305 before_syscall_open_char() to also see mode "rm" as readonly.
306
307 23 Feb 2003; Martin Schlemmer <azarah@gentoo.org> create-localdecls :
308
309 Add glibc-2.3 support.
310
311 22 Feb 2003; Martin Schlemmer <azarah@gentoo.org> sandbox.c :
312
313 Some /etc/ld.so.preload fixes. Just changed the #if defines to cover all
314 operations releated to preload, as well as only try to modify ld.so.preload
315 if we can. Also modify to write the pid to /tmp/sandboxpids.tmp even when
316 not using ld.so.preload. Fix to not write this instance of sandbox's pid
317 to /tmp/sandboxpids.tmp on exit if this is not the last sandbox running.
318
319 22 Feb 2003; Nicholas Jones <carpaski@gentoo.org> Makefile :
320
321 Changed the LD to CC for hppa.
322
323 22 Feb 2003; Nicholas Jones <carpaski@gentoo.org> create-localdecls :
324
325 Killed the previous changes I made.
326
327 17 Feb 2003; Nicholas Jones <carpaski@gentoo.org> create-localdecls :
328
329 Added parisc to BROKEN_RTLD_ARCHLIST to see if it we can fix the relocation probs.
330
331 09 Jan 2003; J Robert Ray <jrray@gentoo.org> sandbox.c :
332
333 Don't segfault if $HOME isn't set, set $HOME to "/" instead. Fixes bug 10868.
334
335 16 Dec 2002; Martin Schlemmer <azarah@gentoo.org> create-localdecls :
336
337 Fix memory leak for mips, bug #12236. Thanks to Torgeir Hansen <torgeir@trenger.ro>
338 for this fix.
339
340 4 Dec 2002; J Robert Ray <jrray@gentoo.org> sandbox.h sandbox_futils.c :
341
342 sandbox_futils defined a dirname() function that was masking the same
343 function in glibc and was broken (e.g.: SANDBOX_DIR was being set to
344 '/usr/lib/portage/bi/'). Fixed function to return expected results and
345 renamed it to sb_dirname() to no longer mask the glibc function. Closes bug
346 11231.
347
348 4 Dec 2002; Martin Schlemmer <azarah@gentoo.org> :
349
350 Fix a segfault in libsandbox.c if canonicalize() was called with
351 first parameter = NULL.
352
353 1 Sep 2002; Martin Schlemmer <azarah@gentoo.org> :
354
355 Fix my braindead 'return 1;' in a void function. Updated sandbox.c,
356 cleanup() for this.
357
358 Change cleanup() in sandbox.c not to exit with fail status if
359 the pidsfile is missing. We really should still display sandbox
360 violations if they occured.
361
362 31 Aug 2002; Martin Schlemmer <azarah@gentoo.org> :
363
364 Update cleanup() in sandbox.c to remove the PIDSFILE if this is
365 the last sandbox running.
366
367 25 Aug 2002; Martin Schlemmer <azarah@gentoo.org> :
368
369 Major cleanups to mainly libsandbox.c again.
370
371 22 Aug 2002; Martin Schlemmer <azarah@gentoo.org> :
372
373 Add copyrights to sandbox.h and sandbox_futils.h. If wrong, the
374 parties involved should please contact me so that we can fix it.
375
376 Add opendir wrapper to libsandbox.c.
377
378 21 Aug 2002; Martin Schlemmer <azarah@gentoo.org> :
379
380 Do some more cleanups to ecanonicalize(), as it dropped filenames in
381 rare cases (after my symlink cleanups), and caused glibc to bork.
382 These fixes went into canonicalize.c.
383
384 20 Aug 2002; Martin Schlemmer <azarah@gentoo.org> :
385
386 Fix spawn_shell() and main() in sandbox.c to properly return fail
387 status.
388
389 19 Aug 2002; Martin Schlemmer <azarah@gentoo.org> :
390
391 The new canonicalize() function in libsandbox.c also resolved symlinks,
392 which caused on cleaning sandbox errors if the symlink pointed to a
393 file in the live root. Ripped out canonicalize() and realpath() from
394 glibc; removed the symlink stuff, and changed them to ecanonicalize()
395 and erealpath().
396
397 18 Aug 2002; Martin Schlemmer <azarah@gentoo.org> :
398
399 Ripped out all the wrappers, and implemented those of InstallWatch.
400 Losts of cleanups and bugfixes. Implement a execve that forces
401 $LIBSANDBOX in $LD_PRELOAD. We can now thus do away with the feared
402 /etc/ld.so.preload (*g*) ... Made the needed changes to sandbox.c,
403 sandbox.h and sandbox_futils.c. Rewrote the Makefile for most
404 parts; it now have an install target.
405
406 Reformat the whole thing to look somewhat like the reworked sandbox.c
407 and new sandbox.h and sandbox_futils.c from:
408
409 Brad House <brad@mainstreetsoftworks.com>.
410
411 Additional Copyrights now due to the InstallWatch code:
412
413 Copyright (C) 1998-9 Pancrazio `Ezio' de Mauro <p@demauro.net>

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