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Revision 88 - (show annotations) (download)
Wed May 11 15:52:08 2005 UTC (9 years, 3 months ago) by azarah
File size: 20380 byte(s)
Move print_sandbox_log() up to make things neater.

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 Move print_sandbox_log() up to make things neater.
7
8 11 May 2005; Martin Schlemmer <azarah@gentoo.org> sandbox.c:
9 Remove load_preload_libs(), as its not used anymore.
10
11 11 May 2005; Martin Schlemmer <azarah@gentoo.org> sandbox.c, sandbox.h:
12 Remove NO_FORK stuff, as its not used, and 'strace -f' works just fine.
13
14 11 May 2005; Martin Schlemmer <azarah@gentoo.org> sandbox.c, sandbox.h:
15 Remove USE_SYSTEM_SHELL stuff, as it is not secure, and not in use.
16
17 11 May 2005; Martin Schlemmer <azarah@gentoo.org> sandbox.c, sandbox.h:
18 Remove ld.so.preload crap - we are not going to use it again.
19
20 10 May 2005; Martin Schlemmer <azarah@gentoo.org> sandbox_futils.c:
21 Fix typo in code that checks if we got valid group information, causing a
22 segmentation fault, bug #91637.
23
24 * sandbox-1.2.6 (2005/05/10)
25
26 10 May 2005; Martin Schlemmer <azarah@gentoo.org> sandbox.c:
27 Do not use LD_PRELOAD if it contains libtsocks.so, as it breaks sandbox
28 for some odd reason, bug #91541.
29
30 09 May 2005; Martin Schlemmer <azarah@gentoo.org> sandbox.c:
31 Fix typo (sizeof -> strlen).
32
33 08 May 2005; Brian Harring <ferringb@gentoo.org> libsandbox.c:
34 rewrote the sbcontext caching code so it accounts for env changes since lib
35 initialization.
36
37 05 May 2005; Martin Schlemmer <azarah@gentoo.org> configure.in, libctest.c:
38 We create libctest.c via configure, so no need to keep it around. Do some
39 cleanup related to libctest.c and libctest during configure.
40
41 04 May 2005; Martin Schlemmer <azarah@gentoo.org> libsandbox.c:
42 Add rename support of symlinks pointing to protected files/directories.
43
44 * sandbox-1.2.5 (2005/05/04)
45
46 04 May 2005; Martin Schlemmer <azarah@gentoo.org> libsandbox.c, sandbox.c,
47 sandbox.bashrc:
48 Do not reset already set LD_PRELOAD when starting sandbox. If LD_PRELOAD is
49 already set, init of the env vars fails for some reason, so do this later on,
50 and do not warn (bug #91431).
51
52 03 May 2005; Martin Schlemmer <azarah@gentoo.org> sandbox.c, sandbox.h,
53 sandbox.bashrc:
54 Fixup sandbox and sandbox.bashrc to call bash with the proper .bashrc.
55
56 * sandbox-1.2.4 (2005/05/03)
57
58 03 May 2005; Martin Schlemmer <azarah@gentoo.org> libsandbox.c:
59 Do not init the env entries with each call, as it creates too many calls to
60 lstat, etc. Should speedup things a bit, bug #91040.
61
62 03 May 2005; Martin Schlemmer <azarah@gentoo.org> sandbox.c:
63 Add /dev/pty to default write list. Noticed by Morfic.
64
65 02 May 2005; Mike Frysinger <vapier@gentoo.org> configure.in, localdecls.h,
66 sandbox.h:
67 uClibc doesn't support dlvsym() so add a configure check to make sure it doesn't
68 exist. Also update localdecls.h so BROKEN_RTLD_NEXT isn't defined in uClibc.
69
70 * sandbox-1.2.3 (2005/04/29)
71
72 29 Apr 2005; Martin Schlemmer <azarah@gentoo.org> configure.in:
73 Do not check for (*&#$(* CXX or F77.
74
75 29 Apr 2005; Martin Schlemmer <azarah@gentoo.org> libsandbox.c:
76 Do not append '/' to pathname in filter_path() if it already ends with it.
77
78 28 Apr 2005; Mike Frysinger <vapier@gentoo.org> Makefile.am, configure.in:
79 With az's help, clean up autotools to work with cross-compiling.
80
81 * sandbox-1.2.2 (2005/04/28)
82
83 28 Apr 2005; Martin Schlemmer <azarah@gentoo.org> libsandbox.c:
84 Only check for /dev/{null,zero} for unlink hack, else ricers using /dev/shm
85 have issues; bug #90592.
86
87 * sandbox-1.2.1 (2005/04/23)
88
89 23 Apr 2005; Martin Schlemmer <azarah@gentoo.org> Makefile.am, canonicalize.c,
90 getcwd.c, libsandbox.c, localdecls.h, sandbox.h, sandbox_futils.c:
91 Make sure all functions used in libsandbox.c is declared static. Define
92 SB_STATIC in localdecls.h for this. Include sandbox_futils.c rather than
93 linking with its object. Hopefully this will fix bug #90153.
94
95 * sandbox-1.2 (2005/04/23)
96
97 22 Mar 2005; Martin Schlemmer <azarah@gentoo.org> libsandbox.c:
98 Allow lchown a symlink in write-allowed path pointing to write-denied
99 target.
100
101 21 Mar 2005; Marius Mauch <genone@gentoo.org> libsandbox.c:
102 Also show resolved symlink names in the log.
103
104 14 Mar 2005; Martin Schlemmer <azarah@gentoo.org> Makefile.am, libsandbox.c:
105 Seems -nostdlib was the problem with the constructor/destructor - remove it
106 from Makefile.am, and change the constructor/destructor names again.
107
108 14 Mar 2005; Martin Schlemmer <azarah@gentoo.org> libsandbox.c:
109 Also rename the _init() and _fini() declarations.
110
111 14 Mar 2005; Martin Schlemmer <azarah@gentoo.org> libsandbox.c, sandbox.c:
112 Fixup the constructor/destructor function names again (they should be _init()
113 and _fini() it seems, and not being called caused sandbox_lib_path to be
114 unset, and thus breaking the execve() wrapper's LD_PRELOAD protection).
115 Add both the path in given SANDBOX_x variable, as well as its symlink
116 resolved path in init_env_entries(). Modify filter_path() to be able to
117 resolve paths without resolving symlinks, as well as to be able to resolve
118 symlinks. Fix a possible segfault in check_access(). Add symlink resolving
119 to check_access() resolving bug #31019. Add 'hack' for unlink, as the fix
120 for bug #31019 cause access violations if we try to remove a symlink that is
121 not in protected path, but points to a protected path. Fix a memory leak in
122 sandbox.c (sandbox_pids_file in main()). Fix the realpath() calls in main()
123 (sandbox.c) being unchecked. Fix the debug logname not having the pid in it
124 (pid_string was uninitialized). General syntax cleanups.
125
126 09 Mar 2005; Brian Harring <ferringb@gentoo.org> sandbox.c: Fixed the
127 infamous "pids file is not a regular file" w/out newline bug.
128
129 09 Mar 2005; Brian Harring <ferringb@gentoo.org> Makefile.am, configure.in:
130 Correct libc_version path detection, since it was screwing up if libdir !=
131 "/lib/".
132
133 02 Mar 2005; Martin Schlemmer <azarah@gentoo.org> libsandbox.c:
134 Hack to make sure sandboxed process cannot remove a device node, bug #79836.
135
136 02 Mar 2005; Martin Schlemmer <azarah@gentoo.org> Makefile.am:
137 Fix symbols.in not added to dist.
138
139 02 Mar 2005; Martin Schlemmer <azarah@gentoo.org> Makefile.am, canonicalize.c,
140 getcwd.c, libsandbox.c, sandbox.c, sandbox.h, sandbox_futils.c:
141 White space fixes.
142
143 02 Mar 2005; Martin Schlemmer <azarah@gentoo.org> Makefile.am, canonicalize.c,
144 configure.in, getcwd.c, libsandbox.c, symbols.in:
145 Fix inverse test logic in canonicalize.c, use a strncpy. Fix gcc warning in
146 getcwd.c. Add symbols.in and logic to Makefile.am to generate symbol versions
147 for glibc and other libc's that use this. Update libsandbox.c to use these
148 symbol versions if available. Fix exec wrapper to re-export LD_PRELOAD if the
149 process unset it.
150
151 01 Mar 2005; Brian Harring <ferringb@gentoo.org> libsandbox.c:
152 killed off _init and _fini in favor of
153 void __attribute__ ((constructor)) init_func and
154 void __attribute__ ((destructor)) closing_func. _(init|func) were deprecated.
155
156 06 Dec 2004; Brian Harring <ferringb@gentoo.org> Makefile.am, libsandbox.c,
157 canonicalize.c, getcwd.c: Fixed compilation *again*. Hopefully cvs is done
158 having the hick-ups.
159
160 04 Dec 2004; Brian Harring <ferringb@gentoo.org> libsandbox.c, getcwd.c,
161 Makefile.am: Fixed compilation.
162
163 01 Dec 2004; Brian Harring <ferringb@gentoo.org> aclocal.m4:
164 Gutted the bugger so it stops checking for a c++ and fortran compiler.
165 Do *not* regenerate aclocal.m4 for making a release until a better
166 solution is created.
167
168 20 Nov 2004; Brian Harring <ferringb@gentoo.org> Makefile.am, sandbox_futils.c:
169 Removal of more hardcoded paths.
170
171 20 Nov 2004; Brian Harring <ferringb@gentoo.org> Makefile.am, configure.in,
172 sandbox_futils.c: tweaks to install sandbox.bashrc, and use it.
173
174 19 Nov 2004; Brian Harring <ferringb@gentoo.org>:
175 Sandbox is now autotooled, create-localdecls needs to be killed and the code
176 shifted into configure.in. Currently builds *one* libsandbox.so- if multiple
177 are desired (-m64 and -m32 for amd64), the ebuild should do it (imo).
178 To get to a point of testing, automake && autoconf; created requisite files w/
179 a(utomake|clocal)-1.8, and autoconf 2.59. Installs to /usr/, instead of
180 /lib and /usr/lib/portage/bin.
181
182 14 Nov 2004; Brian Harring <ferringb@gentoo.org> libsandbox.c, sandbox.c:
183 closing out bug #70225, potential overflow of the sandbox_pids_file var.
184
185 07 Nov 2004; Brian Harring <ferringb@gentoo.org> libsandbox.c: c99 standard,
186 (think it was at least) allows intermixing of code and data segments. bug #70351
187 should be fixed by this.
188
189 03 Nov 2004; Brian Harring <ferringb@gentoo.org> libsandbox.c, sandbox_futils.c:
190 futils fix from bug #65201 via solar, and libsandbox log path checks via #69137
191
192 02 Aug 2004; Nicholas Jones <carpaski@gentoo.org> libsandbox.c: Code from
193 Seth Robertson that tracked down all adjuct flags for read operations that
194 do not invoke a write operation.
195
196 04 Apr 2004; Nicholas Jones <carpaski@gentoo.org> libsandbox.c, sandbox.c:
197 Another fix from jstubbs regarding a free() on a stack variable for the
198 environment -- tracking now prevents extraneous free()'s segfault.
199
200 04 Apr 2004; Nicholas Jones <carpaski@gentoo.org> libsandbox.c, sandbox.c:
201 J. Stubbs tracked down a new bug where mkdir was failing to the patch on
202 the lstat in mkdir... it now only returns 0 or -1 as documented for mkdir.
203 Also remove the errno = ESUCCESS settings as documentation points out that
204 a library isn't allowed to do that.
205
206 04 Apr 2004; Nicholas Jones <carpaski@gentoo.org> libsandbox.c: Added a
207 file_security_check() function to check random potential exploits on files
208 that sandbox is to load and read -- Normally sandboxpids.tmp. This fixes
209 the 'system-crippling' exploits (bug 21923) and catches a few other
210 potential problems.
211
212 20 Mar 2004; Nicholas Jones <carpaski@gentoo.org> Makefile: Updates for
213 32/64 bit sandbox. Made CC and LD '?=' values to allow passed in CC to work.
214
215 20 Mar 2004; Nicholas Jones <carpaski@gentoo.org> libsandbox.c:
216 bug 42048 -- Fixed the lstat/errno conditions for mkdir <caleb@g.o>.
217 Added the 64/32 bit sandbox patch for AMD64 bug 32963 <brad/azarah>.
218
219 29 Feb 2004; Martin Schlemmer <azarah@gentoo.org> sandbox.c, sandbox_futils.c :
220 Fix permissions and group of pids file and logs. Permissions should be 0664
221 and group should be 'portage'. Bug #34260.
222
223 28 Feb 2004; Martin Schlemmer <azarah@gentoo.org> libsandbox.c :
224 Besides a small cleanup, redo how we replace LD_PRELOAD in the environ passed
225 to the real execve (in our execve wrapper). Seems that on some arches (sparc
226 among others) do not allow us to tamper with the readonly copy passed to
227 execve, so pass our own copy of the environment. Bug #42290.
228
229 11 Jan 2004; Nicholas Jones <carpaski@gentoo.org> create-decls:
230 Changed tail to head and added a notice about duration of glibc check.
231
232 21 Dec 2003; Nicholas Jones <carpaski@gentoo.org> create-decls:
233 Changed the glibc subversion check to use /usr/bin/* instead of /bin/sh
234 as there isn't a guarentee that it is dynamic.
235
236 02 Nov 2003; Martin Schlemmer <azarah@gentoo.org> libsandbox.c :
237 If 'file' passed to before_syscall(const char *func, const char *file) is
238 invalid, we should set errno to ENOENT, and not EINVAL. This should
239 close bug #32238.
240
241 14 Oct 2003; Martin Schlemmer <azarah@gentoo.org> libsandbox.c :
242 Fix a bug that occurs mainly on 64bit arch, where the file passed to
243 the functions we wrap, is invalid, and then cause canonicalize to pass
244 garbage to before_syscall(), thanks to great detective work from
245 Andrea Luzzardi <al@sig11.org> (bug #29846).
246
247 13 Oct 2003; Martin Schlemmer <azarah@gentoo.org> create-localdecls :
248 Add a uClibc detection patch from Peter S. Mazinger <ps.m@gmx.net>.
249
250 13 Oct 2003; Martin Schlemmer <azarah@gentoo.org> libsandbox.c :
251 Fix a bug in libsandbox.c 's checking in the rename wrapper - it basically
252 only checked the destination patch, and not the source, so we could move
253 a protected file to a unprotected directory, and then delete/modify it.
254 Thanks to Andrea Luzzardi (scox) <al@sig11.org>, bug #30992, for this fix.
255
256 12 Oct 2003; Nicholas Jones <carpaski@gentoo.org> sandbox.c :
257 Added python2.3 to the predict section/variable.
258
259 28 Sep 2003; Martin Schlemmer <azarah@gentoo.org> libsandbox.c, sandbox.c,
260 sandbox.h, sandbox_futils.c :
261 Add support to set the pids file via SANDBOX_PIDS_FILE at startup. If
262 it is not set, it will revert to its old value.
263
264 27 Sep 2003; Martin Schlemmer <azarah@gentoo.org> libsandbox.c :
265 Fix our mkdir wrapper to check if the dir exist, and return EEXIST if so,
266 rather than failing with a violation, bug #29748.
267
268 27 Jul 2003; Martin Schlemmer <azarah@gentoo.org> libsandbox.c :
269 Fix canonicalize() to ignore calls with path = "".
270
271 27 Jul 2003; Martin Schlemmer <azarah@gentoo.org> getcwd.c, libsandbox.c,
272 sandbox_futils.c, canonicalize.c :
273 Once again coreutils fails, as my systems had 2.5 kernel, the getcwd system
274 call handled strings larger than PATH_MAX (bug #21766). It however does not
275 work the same on 2.4 kernels.
276
277 To fix, I added the posix implementation of getcwd() (from glibc cvs) that
278 do not need the system call. We use the default getcwd() function via a
279 wrapper (egetcwd), and then lstat the returned path. If lstat fails, it
280 means the current directory was removed, OR that the the system call for
281 getcwd failed (curious is that it do not fail and return NULL or set
282 errno, but rather just truncate the retured directory - usually from the
283 start), and if so, we use the generic getcwd() function (__egetcwd). Note
284 that we do not use the generic version all the time, as it calls lstat()
285 a great number of times, and performance degrade much.
286
287 29 Jun 2003; Martin Schlemmer <azarah@gentoo.org> create-localdecls,
288 libsandbox.c :
289 Make sure SB_PATH_MAX will not wrap. Fix two possible memory leaks.
290
291 22 Jun 2003; Martin Schlemmer <azarah@gentoo.org> libsandbox.c, canonicalize.c
292 create-localdecls :
293 When checking path names of files accessed, we need to canonicalize it, else
294 it may be a symlink in a 'write allowed' directory pointing to a file in a
295 directory we should not have write access to.
296
297 With something like coreutils-5.0, we have two problems:
298 1) One of the tests checks if getcwd() can return a path longer than
299 PATH_MAX. This test then tries to create a dir which even while
300 created local (mkdir("conftest2")), it ends up being resolved with
301 a name that is much larger than PATH_MAX. The problem now is that
302 canonicalize() have undefined behaviour when the path was too long
303 (returned wrongly truncated paths, etc), and pass the wrong path to
304 before_syscall() (causing the bogus sandbox violations).
305 2) The ecanonicalize() function we used, along with the canonicalize()
306 function did not support longer than PATH_MAX. This is partly a
307 cause for 1), but the error checking (rather lack of it) of calls
308 to erealpath() in canonicalize() was the prime reason for 1).
309
310 As we do not use this canonicalized name to call the function, we resolve this
311 by fixing canonicalize() to do better error checking, and ecanonicalize() as
312 well as all functions in libsandbox.c to use a PATH_MAX of 'PATH_MAX * 2'.
313 While they will resolve paths properly now, and can check if a write/read is
314 allowed, the functions called from the sandboxed environment will still work
315 as expected.
316
317 This should resolve bug #21766.
318
319 06 Apr 2003; Martin Schlemmer <azarah@gentoo.org> libsandbox.c :
320 For some reason sandbox fails with a 'open_wr' if you run 'locale -a' under
321 it (bug #16298).
322
323 Problem is that for some reason locale fopen's locale.alias with mode "rm".
324
325 -------------------------------------------------------
326 nosferatu root # grep fopen locale.log
327 fopen("/usr/share/locale/locale.alias", "rm"ACCESS DENIED open_wr: /usr/share/locale/locale.alias
328 nosferatu root #
329 --------------------------------------------------------
330
331 I checked the source of locale, but it have fopen with mode 'r', so
332 not sure where the "rm" mode comes from. Anyhow, changed the check in
333 before_syscall_open_char() to also see mode "rm" as readonly.
334
335 23 Feb 2003; Martin Schlemmer <azarah@gentoo.org> create-localdecls :
336
337 Add glibc-2.3 support.
338
339 22 Feb 2003; Martin Schlemmer <azarah@gentoo.org> sandbox.c :
340
341 Some /etc/ld.so.preload fixes. Just changed the #if defines to cover all
342 operations releated to preload, as well as only try to modify ld.so.preload
343 if we can. Also modify to write the pid to /tmp/sandboxpids.tmp even when
344 not using ld.so.preload. Fix to not write this instance of sandbox's pid
345 to /tmp/sandboxpids.tmp on exit if this is not the last sandbox running.
346
347 22 Feb 2003; Nicholas Jones <carpaski@gentoo.org> Makefile :
348
349 Changed the LD to CC for hppa.
350
351 22 Feb 2003; Nicholas Jones <carpaski@gentoo.org> create-localdecls :
352
353 Killed the previous changes I made.
354
355 17 Feb 2003; Nicholas Jones <carpaski@gentoo.org> create-localdecls :
356
357 Added parisc to BROKEN_RTLD_ARCHLIST to see if it we can fix the relocation probs.
358
359 09 Jan 2003; J Robert Ray <jrray@gentoo.org> sandbox.c :
360
361 Don't segfault if $HOME isn't set, set $HOME to "/" instead. Fixes bug 10868.
362
363 16 Dec 2002; Martin Schlemmer <azarah@gentoo.org> create-localdecls :
364
365 Fix memory leak for mips, bug #12236. Thanks to Torgeir Hansen <torgeir@trenger.ro>
366 for this fix.
367
368 4 Dec 2002; J Robert Ray <jrray@gentoo.org> sandbox.h sandbox_futils.c :
369
370 sandbox_futils defined a dirname() function that was masking the same
371 function in glibc and was broken (e.g.: SANDBOX_DIR was being set to
372 '/usr/lib/portage/bi/'). Fixed function to return expected results and
373 renamed it to sb_dirname() to no longer mask the glibc function. Closes bug
374 11231.
375
376 4 Dec 2002; Martin Schlemmer <azarah@gentoo.org> :
377
378 Fix a segfault in libsandbox.c if canonicalize() was called with
379 first parameter = NULL.
380
381 1 Sep 2002; Martin Schlemmer <azarah@gentoo.org> :
382
383 Fix my braindead 'return 1;' in a void function. Updated sandbox.c,
384 cleanup() for this.
385
386 Change cleanup() in sandbox.c not to exit with fail status if
387 the pidsfile is missing. We really should still display sandbox
388 violations if they occured.
389
390 31 Aug 2002; Martin Schlemmer <azarah@gentoo.org> :
391
392 Update cleanup() in sandbox.c to remove the PIDSFILE if this is
393 the last sandbox running.
394
395 25 Aug 2002; Martin Schlemmer <azarah@gentoo.org> :
396
397 Major cleanups to mainly libsandbox.c again.
398
399 22 Aug 2002; Martin Schlemmer <azarah@gentoo.org> :
400
401 Add copyrights to sandbox.h and sandbox_futils.h. If wrong, the
402 parties involved should please contact me so that we can fix it.
403
404 Add opendir wrapper to libsandbox.c.
405
406 21 Aug 2002; Martin Schlemmer <azarah@gentoo.org> :
407
408 Do some more cleanups to ecanonicalize(), as it dropped filenames in
409 rare cases (after my symlink cleanups), and caused glibc to bork.
410 These fixes went into canonicalize.c.
411
412 20 Aug 2002; Martin Schlemmer <azarah@gentoo.org> :
413
414 Fix spawn_shell() and main() in sandbox.c to properly return fail
415 status.
416
417 19 Aug 2002; Martin Schlemmer <azarah@gentoo.org> :
418
419 The new canonicalize() function in libsandbox.c also resolved symlinks,
420 which caused on cleaning sandbox errors if the symlink pointed to a
421 file in the live root. Ripped out canonicalize() and realpath() from
422 glibc; removed the symlink stuff, and changed them to ecanonicalize()
423 and erealpath().
424
425 18 Aug 2002; Martin Schlemmer <azarah@gentoo.org> :
426
427 Ripped out all the wrappers, and implemented those of InstallWatch.
428 Losts of cleanups and bugfixes. Implement a execve that forces
429 $LIBSANDBOX in $LD_PRELOAD. We can now thus do away with the feared
430 /etc/ld.so.preload (*g*) ... Made the needed changes to sandbox.c,
431 sandbox.h and sandbox_futils.c. Rewrote the Makefile for most
432 parts; it now have an install target.
433
434 Reformat the whole thing to look somewhat like the reworked sandbox.c
435 and new sandbox.h and sandbox_futils.c from:
436
437 Brad House <brad@mainstreetsoftworks.com>.
438
439 Additional Copyrights now due to the InstallWatch code:
440
441 Copyright (C) 1998-9 Pancrazio `Ezio' de Mauro <p@demauro.net>

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