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Wed Mar 2 09:04:45 2005 UTC (9 years, 9 months ago) by azarah
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White space fixes.

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

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