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Revision 87 - (show annotations) (download)
Wed May 11 15:48:18 2005 UTC (9 years, 3 months ago) by azarah
File size: 20263 byte(s)
Remove load_preload_libs(), as its not used anymore.

1 # ChangeLog for Path Sandbox
2 # Copyright 1999-2005 Gentoo Foundation; Distributed under the GPL v2
3 # $Header$
4
5 11 May 2005; Martin Schlemmer <azarah@gentoo.org> sandbox.c:
6 Remove load_preload_libs(), as its not used anymore.
7
8 11 May 2005; Martin Schlemmer <azarah@gentoo.org> sandbox.c, sandbox.h:
9 Remove NO_FORK stuff, as its not used, and 'strace -f' works just fine.
10
11 11 May 2005; Martin Schlemmer <azarah@gentoo.org> sandbox.c, sandbox.h:
12 Remove USE_SYSTEM_SHELL stuff, as it is not secure, and not in use.
13
14 11 May 2005; Martin Schlemmer <azarah@gentoo.org> sandbox.c, sandbox.h:
15 Remove ld.so.preload crap - we are not going to use it again.
16
17 10 May 2005; Martin Schlemmer <azarah@gentoo.org> sandbox_futils.c:
18 Fix typo in code that checks if we got valid group information, causing a
19 segmentation fault, bug #91637.
20
21 * sandbox-1.2.6 (2005/05/10)
22
23 10 May 2005; Martin Schlemmer <azarah@gentoo.org> sandbox.c:
24 Do not use LD_PRELOAD if it contains libtsocks.so, as it breaks sandbox
25 for some odd reason, bug #91541.
26
27 09 May 2005; Martin Schlemmer <azarah@gentoo.org> sandbox.c:
28 Fix typo (sizeof -> strlen).
29
30 08 May 2005; Brian Harring <ferringb@gentoo.org> libsandbox.c:
31 rewrote the sbcontext caching code so it accounts for env changes since lib
32 initialization.
33
34 05 May 2005; Martin Schlemmer <azarah@gentoo.org> configure.in, libctest.c:
35 We create libctest.c via configure, so no need to keep it around. Do some
36 cleanup related to libctest.c and libctest during configure.
37
38 04 May 2005; Martin Schlemmer <azarah@gentoo.org> libsandbox.c:
39 Add rename support of symlinks pointing to protected files/directories.
40
41 * sandbox-1.2.5 (2005/05/04)
42
43 04 May 2005; Martin Schlemmer <azarah@gentoo.org> libsandbox.c, sandbox.c,
44 sandbox.bashrc:
45 Do not reset already set LD_PRELOAD when starting sandbox. If LD_PRELOAD is
46 already set, init of the env vars fails for some reason, so do this later on,
47 and do not warn (bug #91431).
48
49 03 May 2005; Martin Schlemmer <azarah@gentoo.org> sandbox.c, sandbox.h,
50 sandbox.bashrc:
51 Fixup sandbox and sandbox.bashrc to call bash with the proper .bashrc.
52
53 * sandbox-1.2.4 (2005/05/03)
54
55 03 May 2005; Martin Schlemmer <azarah@gentoo.org> libsandbox.c:
56 Do not init the env entries with each call, as it creates too many calls to
57 lstat, etc. Should speedup things a bit, bug #91040.
58
59 03 May 2005; Martin Schlemmer <azarah@gentoo.org> sandbox.c:
60 Add /dev/pty to default write list. Noticed by Morfic.
61
62 02 May 2005; Mike Frysinger <vapier@gentoo.org> configure.in, localdecls.h,
63 sandbox.h:
64 uClibc doesn't support dlvsym() so add a configure check to make sure it doesn't
65 exist. Also update localdecls.h so BROKEN_RTLD_NEXT isn't defined in uClibc.
66
67 * sandbox-1.2.3 (2005/04/29)
68
69 29 Apr 2005; Martin Schlemmer <azarah@gentoo.org> configure.in:
70 Do not check for (*&#$(* CXX or F77.
71
72 29 Apr 2005; Martin Schlemmer <azarah@gentoo.org> libsandbox.c:
73 Do not append '/' to pathname in filter_path() if it already ends with it.
74
75 28 Apr 2005; Mike Frysinger <vapier@gentoo.org> Makefile.am, configure.in:
76 With az's help, clean up autotools to work with cross-compiling.
77
78 * sandbox-1.2.2 (2005/04/28)
79
80 28 Apr 2005; Martin Schlemmer <azarah@gentoo.org> libsandbox.c:
81 Only check for /dev/{null,zero} for unlink hack, else ricers using /dev/shm
82 have issues; bug #90592.
83
84 * sandbox-1.2.1 (2005/04/23)
85
86 23 Apr 2005; Martin Schlemmer <azarah@gentoo.org> Makefile.am, canonicalize.c,
87 getcwd.c, libsandbox.c, localdecls.h, sandbox.h, sandbox_futils.c:
88 Make sure all functions used in libsandbox.c is declared static. Define
89 SB_STATIC in localdecls.h for this. Include sandbox_futils.c rather than
90 linking with its object. Hopefully this will fix bug #90153.
91
92 * sandbox-1.2 (2005/04/23)
93
94 22 Mar 2005; Martin Schlemmer <azarah@gentoo.org> libsandbox.c:
95 Allow lchown a symlink in write-allowed path pointing to write-denied
96 target.
97
98 21 Mar 2005; Marius Mauch <genone@gentoo.org> libsandbox.c:
99 Also show resolved symlink names in the log.
100
101 14 Mar 2005; Martin Schlemmer <azarah@gentoo.org> Makefile.am, libsandbox.c:
102 Seems -nostdlib was the problem with the constructor/destructor - remove it
103 from Makefile.am, and change the constructor/destructor names again.
104
105 14 Mar 2005; Martin Schlemmer <azarah@gentoo.org> libsandbox.c:
106 Also rename the _init() and _fini() declarations.
107
108 14 Mar 2005; Martin Schlemmer <azarah@gentoo.org> libsandbox.c, sandbox.c:
109 Fixup the constructor/destructor function names again (they should be _init()
110 and _fini() it seems, and not being called caused sandbox_lib_path to be
111 unset, and thus breaking the execve() wrapper's LD_PRELOAD protection).
112 Add both the path in given SANDBOX_x variable, as well as its symlink
113 resolved path in init_env_entries(). Modify filter_path() to be able to
114 resolve paths without resolving symlinks, as well as to be able to resolve
115 symlinks. Fix a possible segfault in check_access(). Add symlink resolving
116 to check_access() resolving bug #31019. Add 'hack' for unlink, as the fix
117 for bug #31019 cause access violations if we try to remove a symlink that is
118 not in protected path, but points to a protected path. Fix a memory leak in
119 sandbox.c (sandbox_pids_file in main()). Fix the realpath() calls in main()
120 (sandbox.c) being unchecked. Fix the debug logname not having the pid in it
121 (pid_string was uninitialized). General syntax cleanups.
122
123 09 Mar 2005; Brian Harring <ferringb@gentoo.org> sandbox.c: Fixed the
124 infamous "pids file is not a regular file" w/out newline bug.
125
126 09 Mar 2005; Brian Harring <ferringb@gentoo.org> Makefile.am, configure.in:
127 Correct libc_version path detection, since it was screwing up if libdir !=
128 "/lib/".
129
130 02 Mar 2005; Martin Schlemmer <azarah@gentoo.org> libsandbox.c:
131 Hack to make sure sandboxed process cannot remove a device node, bug #79836.
132
133 02 Mar 2005; Martin Schlemmer <azarah@gentoo.org> Makefile.am:
134 Fix symbols.in not added to dist.
135
136 02 Mar 2005; Martin Schlemmer <azarah@gentoo.org> Makefile.am, canonicalize.c,
137 getcwd.c, libsandbox.c, sandbox.c, sandbox.h, sandbox_futils.c:
138 White space fixes.
139
140 02 Mar 2005; Martin Schlemmer <azarah@gentoo.org> Makefile.am, canonicalize.c,
141 configure.in, getcwd.c, libsandbox.c, symbols.in:
142 Fix inverse test logic in canonicalize.c, use a strncpy. Fix gcc warning in
143 getcwd.c. Add symbols.in and logic to Makefile.am to generate symbol versions
144 for glibc and other libc's that use this. Update libsandbox.c to use these
145 symbol versions if available. Fix exec wrapper to re-export LD_PRELOAD if the
146 process unset it.
147
148 01 Mar 2005; Brian Harring <ferringb@gentoo.org> libsandbox.c:
149 killed off _init and _fini in favor of
150 void __attribute__ ((constructor)) init_func and
151 void __attribute__ ((destructor)) closing_func. _(init|func) were deprecated.
152
153 06 Dec 2004; Brian Harring <ferringb@gentoo.org> Makefile.am, libsandbox.c,
154 canonicalize.c, getcwd.c: Fixed compilation *again*. Hopefully cvs is done
155 having the hick-ups.
156
157 04 Dec 2004; Brian Harring <ferringb@gentoo.org> libsandbox.c, getcwd.c,
158 Makefile.am: Fixed compilation.
159
160 01 Dec 2004; Brian Harring <ferringb@gentoo.org> aclocal.m4:
161 Gutted the bugger so it stops checking for a c++ and fortran compiler.
162 Do *not* regenerate aclocal.m4 for making a release until a better
163 solution is created.
164
165 20 Nov 2004; Brian Harring <ferringb@gentoo.org> Makefile.am, sandbox_futils.c:
166 Removal of more hardcoded paths.
167
168 20 Nov 2004; Brian Harring <ferringb@gentoo.org> Makefile.am, configure.in,
169 sandbox_futils.c: tweaks to install sandbox.bashrc, and use it.
170
171 19 Nov 2004; Brian Harring <ferringb@gentoo.org>:
172 Sandbox is now autotooled, create-localdecls needs to be killed and the code
173 shifted into configure.in. Currently builds *one* libsandbox.so- if multiple
174 are desired (-m64 and -m32 for amd64), the ebuild should do it (imo).
175 To get to a point of testing, automake && autoconf; created requisite files w/
176 a(utomake|clocal)-1.8, and autoconf 2.59. Installs to /usr/, instead of
177 /lib and /usr/lib/portage/bin.
178
179 14 Nov 2004; Brian Harring <ferringb@gentoo.org> libsandbox.c, sandbox.c:
180 closing out bug #70225, potential overflow of the sandbox_pids_file var.
181
182 07 Nov 2004; Brian Harring <ferringb@gentoo.org> libsandbox.c: c99 standard,
183 (think it was at least) allows intermixing of code and data segments. bug #70351
184 should be fixed by this.
185
186 03 Nov 2004; Brian Harring <ferringb@gentoo.org> libsandbox.c, sandbox_futils.c:
187 futils fix from bug #65201 via solar, and libsandbox log path checks via #69137
188
189 02 Aug 2004; Nicholas Jones <carpaski@gentoo.org> libsandbox.c: Code from
190 Seth Robertson that tracked down all adjuct flags for read operations that
191 do not invoke a write operation.
192
193 04 Apr 2004; Nicholas Jones <carpaski@gentoo.org> libsandbox.c, sandbox.c:
194 Another fix from jstubbs regarding a free() on a stack variable for the
195 environment -- tracking now prevents extraneous free()'s segfault.
196
197 04 Apr 2004; Nicholas Jones <carpaski@gentoo.org> libsandbox.c, sandbox.c:
198 J. Stubbs tracked down a new bug where mkdir was failing to the patch on
199 the lstat in mkdir... it now only returns 0 or -1 as documented for mkdir.
200 Also remove the errno = ESUCCESS settings as documentation points out that
201 a library isn't allowed to do that.
202
203 04 Apr 2004; Nicholas Jones <carpaski@gentoo.org> libsandbox.c: Added a
204 file_security_check() function to check random potential exploits on files
205 that sandbox is to load and read -- Normally sandboxpids.tmp. This fixes
206 the 'system-crippling' exploits (bug 21923) and catches a few other
207 potential problems.
208
209 20 Mar 2004; Nicholas Jones <carpaski@gentoo.org> Makefile: Updates for
210 32/64 bit sandbox. Made CC and LD '?=' values to allow passed in CC to work.
211
212 20 Mar 2004; Nicholas Jones <carpaski@gentoo.org> libsandbox.c:
213 bug 42048 -- Fixed the lstat/errno conditions for mkdir <caleb@g.o>.
214 Added the 64/32 bit sandbox patch for AMD64 bug 32963 <brad/azarah>.
215
216 29 Feb 2004; Martin Schlemmer <azarah@gentoo.org> sandbox.c, sandbox_futils.c :
217 Fix permissions and group of pids file and logs. Permissions should be 0664
218 and group should be 'portage'. Bug #34260.
219
220 28 Feb 2004; Martin Schlemmer <azarah@gentoo.org> libsandbox.c :
221 Besides a small cleanup, redo how we replace LD_PRELOAD in the environ passed
222 to the real execve (in our execve wrapper). Seems that on some arches (sparc
223 among others) do not allow us to tamper with the readonly copy passed to
224 execve, so pass our own copy of the environment. Bug #42290.
225
226 11 Jan 2004; Nicholas Jones <carpaski@gentoo.org> create-decls:
227 Changed tail to head and added a notice about duration of glibc check.
228
229 21 Dec 2003; Nicholas Jones <carpaski@gentoo.org> create-decls:
230 Changed the glibc subversion check to use /usr/bin/* instead of /bin/sh
231 as there isn't a guarentee that it is dynamic.
232
233 02 Nov 2003; Martin Schlemmer <azarah@gentoo.org> libsandbox.c :
234 If 'file' passed to before_syscall(const char *func, const char *file) is
235 invalid, we should set errno to ENOENT, and not EINVAL. This should
236 close bug #32238.
237
238 14 Oct 2003; Martin Schlemmer <azarah@gentoo.org> libsandbox.c :
239 Fix a bug that occurs mainly on 64bit arch, where the file passed to
240 the functions we wrap, is invalid, and then cause canonicalize to pass
241 garbage to before_syscall(), thanks to great detective work from
242 Andrea Luzzardi <al@sig11.org> (bug #29846).
243
244 13 Oct 2003; Martin Schlemmer <azarah@gentoo.org> create-localdecls :
245 Add a uClibc detection patch from Peter S. Mazinger <ps.m@gmx.net>.
246
247 13 Oct 2003; Martin Schlemmer <azarah@gentoo.org> libsandbox.c :
248 Fix a bug in libsandbox.c 's checking in the rename wrapper - it basically
249 only checked the destination patch, and not the source, so we could move
250 a protected file to a unprotected directory, and then delete/modify it.
251 Thanks to Andrea Luzzardi (scox) <al@sig11.org>, bug #30992, for this fix.
252
253 12 Oct 2003; Nicholas Jones <carpaski@gentoo.org> sandbox.c :
254 Added python2.3 to the predict section/variable.
255
256 28 Sep 2003; Martin Schlemmer <azarah@gentoo.org> libsandbox.c, sandbox.c,
257 sandbox.h, sandbox_futils.c :
258 Add support to set the pids file via SANDBOX_PIDS_FILE at startup. If
259 it is not set, it will revert to its old value.
260
261 27 Sep 2003; Martin Schlemmer <azarah@gentoo.org> libsandbox.c :
262 Fix our mkdir wrapper to check if the dir exist, and return EEXIST if so,
263 rather than failing with a violation, bug #29748.
264
265 27 Jul 2003; Martin Schlemmer <azarah@gentoo.org> libsandbox.c :
266 Fix canonicalize() to ignore calls with path = "".
267
268 27 Jul 2003; Martin Schlemmer <azarah@gentoo.org> getcwd.c, libsandbox.c,
269 sandbox_futils.c, canonicalize.c :
270 Once again coreutils fails, as my systems had 2.5 kernel, the getcwd system
271 call handled strings larger than PATH_MAX (bug #21766). It however does not
272 work the same on 2.4 kernels.
273
274 To fix, I added the posix implementation of getcwd() (from glibc cvs) that
275 do not need the system call. We use the default getcwd() function via a
276 wrapper (egetcwd), and then lstat the returned path. If lstat fails, it
277 means the current directory was removed, OR that the the system call for
278 getcwd failed (curious is that it do not fail and return NULL or set
279 errno, but rather just truncate the retured directory - usually from the
280 start), and if so, we use the generic getcwd() function (__egetcwd). Note
281 that we do not use the generic version all the time, as it calls lstat()
282 a great number of times, and performance degrade much.
283
284 29 Jun 2003; Martin Schlemmer <azarah@gentoo.org> create-localdecls,
285 libsandbox.c :
286 Make sure SB_PATH_MAX will not wrap. Fix two possible memory leaks.
287
288 22 Jun 2003; Martin Schlemmer <azarah@gentoo.org> libsandbox.c, canonicalize.c
289 create-localdecls :
290 When checking path names of files accessed, we need to canonicalize it, else
291 it may be a symlink in a 'write allowed' directory pointing to a file in a
292 directory we should not have write access to.
293
294 With something like coreutils-5.0, we have two problems:
295 1) One of the tests checks if getcwd() can return a path longer than
296 PATH_MAX. This test then tries to create a dir which even while
297 created local (mkdir("conftest2")), it ends up being resolved with
298 a name that is much larger than PATH_MAX. The problem now is that
299 canonicalize() have undefined behaviour when the path was too long
300 (returned wrongly truncated paths, etc), and pass the wrong path to
301 before_syscall() (causing the bogus sandbox violations).
302 2) The ecanonicalize() function we used, along with the canonicalize()
303 function did not support longer than PATH_MAX. This is partly a
304 cause for 1), but the error checking (rather lack of it) of calls
305 to erealpath() in canonicalize() was the prime reason for 1).
306
307 As we do not use this canonicalized name to call the function, we resolve this
308 by fixing canonicalize() to do better error checking, and ecanonicalize() as
309 well as all functions in libsandbox.c to use a PATH_MAX of 'PATH_MAX * 2'.
310 While they will resolve paths properly now, and can check if a write/read is
311 allowed, the functions called from the sandboxed environment will still work
312 as expected.
313
314 This should resolve bug #21766.
315
316 06 Apr 2003; Martin Schlemmer <azarah@gentoo.org> libsandbox.c :
317 For some reason sandbox fails with a 'open_wr' if you run 'locale -a' under
318 it (bug #16298).
319
320 Problem is that for some reason locale fopen's locale.alias with mode "rm".
321
322 -------------------------------------------------------
323 nosferatu root # grep fopen locale.log
324 fopen("/usr/share/locale/locale.alias", "rm"ACCESS DENIED open_wr: /usr/share/locale/locale.alias
325 nosferatu root #
326 --------------------------------------------------------
327
328 I checked the source of locale, but it have fopen with mode 'r', so
329 not sure where the "rm" mode comes from. Anyhow, changed the check in
330 before_syscall_open_char() to also see mode "rm" as readonly.
331
332 23 Feb 2003; Martin Schlemmer <azarah@gentoo.org> create-localdecls :
333
334 Add glibc-2.3 support.
335
336 22 Feb 2003; Martin Schlemmer <azarah@gentoo.org> sandbox.c :
337
338 Some /etc/ld.so.preload fixes. Just changed the #if defines to cover all
339 operations releated to preload, as well as only try to modify ld.so.preload
340 if we can. Also modify to write the pid to /tmp/sandboxpids.tmp even when
341 not using ld.so.preload. Fix to not write this instance of sandbox's pid
342 to /tmp/sandboxpids.tmp on exit if this is not the last sandbox running.
343
344 22 Feb 2003; Nicholas Jones <carpaski@gentoo.org> Makefile :
345
346 Changed the LD to CC for hppa.
347
348 22 Feb 2003; Nicholas Jones <carpaski@gentoo.org> create-localdecls :
349
350 Killed the previous changes I made.
351
352 17 Feb 2003; Nicholas Jones <carpaski@gentoo.org> create-localdecls :
353
354 Added parisc to BROKEN_RTLD_ARCHLIST to see if it we can fix the relocation probs.
355
356 09 Jan 2003; J Robert Ray <jrray@gentoo.org> sandbox.c :
357
358 Don't segfault if $HOME isn't set, set $HOME to "/" instead. Fixes bug 10868.
359
360 16 Dec 2002; Martin Schlemmer <azarah@gentoo.org> create-localdecls :
361
362 Fix memory leak for mips, bug #12236. Thanks to Torgeir Hansen <torgeir@trenger.ro>
363 for this fix.
364
365 4 Dec 2002; J Robert Ray <jrray@gentoo.org> sandbox.h sandbox_futils.c :
366
367 sandbox_futils defined a dirname() function that was masking the same
368 function in glibc and was broken (e.g.: SANDBOX_DIR was being set to
369 '/usr/lib/portage/bi/'). Fixed function to return expected results and
370 renamed it to sb_dirname() to no longer mask the glibc function. Closes bug
371 11231.
372
373 4 Dec 2002; Martin Schlemmer <azarah@gentoo.org> :
374
375 Fix a segfault in libsandbox.c if canonicalize() was called with
376 first parameter = NULL.
377
378 1 Sep 2002; Martin Schlemmer <azarah@gentoo.org> :
379
380 Fix my braindead 'return 1;' in a void function. Updated sandbox.c,
381 cleanup() for this.
382
383 Change cleanup() in sandbox.c not to exit with fail status if
384 the pidsfile is missing. We really should still display sandbox
385 violations if they occured.
386
387 31 Aug 2002; Martin Schlemmer <azarah@gentoo.org> :
388
389 Update cleanup() in sandbox.c to remove the PIDSFILE if this is
390 the last sandbox running.
391
392 25 Aug 2002; Martin Schlemmer <azarah@gentoo.org> :
393
394 Major cleanups to mainly libsandbox.c again.
395
396 22 Aug 2002; Martin Schlemmer <azarah@gentoo.org> :
397
398 Add copyrights to sandbox.h and sandbox_futils.h. If wrong, the
399 parties involved should please contact me so that we can fix it.
400
401 Add opendir wrapper to libsandbox.c.
402
403 21 Aug 2002; Martin Schlemmer <azarah@gentoo.org> :
404
405 Do some more cleanups to ecanonicalize(), as it dropped filenames in
406 rare cases (after my symlink cleanups), and caused glibc to bork.
407 These fixes went into canonicalize.c.
408
409 20 Aug 2002; Martin Schlemmer <azarah@gentoo.org> :
410
411 Fix spawn_shell() and main() in sandbox.c to properly return fail
412 status.
413
414 19 Aug 2002; Martin Schlemmer <azarah@gentoo.org> :
415
416 The new canonicalize() function in libsandbox.c also resolved symlinks,
417 which caused on cleaning sandbox errors if the symlink pointed to a
418 file in the live root. Ripped out canonicalize() and realpath() from
419 glibc; removed the symlink stuff, and changed them to ecanonicalize()
420 and erealpath().
421
422 18 Aug 2002; Martin Schlemmer <azarah@gentoo.org> :
423
424 Ripped out all the wrappers, and implemented those of InstallWatch.
425 Losts of cleanups and bugfixes. Implement a execve that forces
426 $LIBSANDBOX in $LD_PRELOAD. We can now thus do away with the feared
427 /etc/ld.so.preload (*g*) ... Made the needed changes to sandbox.c,
428 sandbox.h and sandbox_futils.c. Rewrote the Makefile for most
429 parts; it now have an install target.
430
431 Reformat the whole thing to look somewhat like the reworked sandbox.c
432 and new sandbox.h and sandbox_futils.c from:
433
434 Brad House <brad@mainstreetsoftworks.com>.
435
436 Additional Copyrights now due to the InstallWatch code:
437
438 Copyright (C) 1998-9 Pancrazio `Ezio' de Mauro <p@demauro.net>

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