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53 Commits

Author SHA1 Message Date
Nick Mathewson
6e689aed75 Fix a memory leak in tor-resolve 
Resolves bug 14050
 2014-12-30 12:35:01 -05:00
Nick Mathewson
fcdcb377a4 Add another year to our copyright dates. 
Because in 95 years, we or our successors will surely care about
enforcing the BSD license terms on this code.  Right?
 2014-10-28 15:30:16 -04:00
Nick Mathewson
2e607ff519 Merge remote-tracking branch 'origin/maint-0.2.5' 2014-09-29 13:02:50 -04:00
Nick Mathewson
09951bea7f Don't use the getaddrinfo sandbox cache from tor-resolve 
Fixes bug 13295; bugfix on 0.2.5.3-alpha.

The alternative here is to call crypto_global_init() from tor-resolve,
but let's avoid linking openssl into tor-resolve for as long as we
can.
 2014-09-29 12:57:07 -04:00
Nick Mathewson
7c1143e11f Terser ways to sandbox-allow related filenames 
Using the *_array() functions here confused coverity, and was actually
a bit longer than we needed.  Now we just use macros for the repeated
bits, so that we can mention a file and a suffix-appended version in
one line.
 2014-08-24 13:30:55 -04:00
Nick Mathewson
35b2e11755 Store sandbox params as char *, since that's what they are. 
This allows coverity to infer that we aren't leaking them.

[Fixes a lot of CIDs]
 2014-08-21 11:22:42 -04:00
Nick Mathewson
6f20dd7bfc Merge remote-tracking branch 'public/bug11970' 2014-06-11 11:01:52 -04:00
Nick Mathewson
b0c1c70011 Make sandbox.c compile on arm 
This is a minimal set of changes for compilation; I need a more
recent kernel to test this stuff.
 2014-05-27 17:34:52 -04:00
Nick Mathewson
e425fc7804 sandbox: revamp sandbox_getaddrinfo cacheing 
The old cache had problems:
     * It needed to be manually preloaded. (It didn't remember any
       address you didn't tell it to remember)
     * It was AF_INET only.
     * It looked at its cache even if the sandbox wasn't turned on.
     * It couldn't remember errors.
     * It had some memory management problems. (You can't use memcpy
       to copy an addrinfo safely; it has pointers in.)

This patch fixes those issues, and moves to a hash table.

Fixes bug 11970; bugfix on 0.2.5.1-alpha.
 2014-05-22 17:39:36 -04:00
Nick Mathewson
465982012c sandbox: Disallow options which would make us call exec() 
None of the things we might exec() can possibly run under the
sanbox, so rather than crash later, we have to refuse to accept the
configuration nice and early.

The longer-term solution is to have an exec() helper, but wow is
that risky.

fixes 12043; bugfix on 0.2.5.1-alpha
 2014-05-20 12:21:31 -04:00
Nick Mathewson
6194970765 Don't allow change to ConnLimit while sandbox is active 2014-04-16 22:03:18 -04:00
Nick Mathewson
f268101a61 Clean up sandbox structures a bit 
Drop pindex,pindex2 as unused.

Admit a type to avoid using a void*
 2014-04-16 22:03:08 -04:00
Nick Mathewson
71eaebd971 Drop 'fr' parameter from sandbox code. 
Appearently, the majority of the filenames we pass to
sandbox_cfg_allow() functions are "freeable right after". So, consider
_all_ of them safe-to-steal, and add a tor_strdup() in the few cases
that aren't.

(Maybe buggy; revise when I can test.)
 2014-04-16 22:03:08 -04:00
Nick Mathewson
cbfb8e703e Add 'rename' to the sandboxed syscalls 
(If we don't restrict rename, there's not much point in restricting
open, since an attacker could always use rename to make us open
whatever they want.)
 2014-04-16 22:03:08 -04:00
Nick Mathewson
fbc20294aa Merge branch 'backtrace_squashed' 
Conflicts:
	src/common/sandbox.c
	src/common/sandbox.h
	src/common/util.c
	src/or/main.c
	src/test/include.am
	src/test/test.c
 2013-11-18 11:00:16 -05:00
Nick Mathewson
bd8ad674b9 Add a sighandler-safe logging mechanism 
We had accidentially grown two fake ones: one for backtrace.c, and one
for sandbox.c.  Let's do this properly instead.

Now, when we configure logs, we keep track of fds that should get told
about bad stuff happening from signal handlers.  There's another entry
point for these that avoids using non-signal-handler-safe functions.
 2013-11-18 10:43:15 -05:00
Nick Mathewson
6a11b6f97d Fix osx compilation again, hopefully better this time. 2013-09-11 13:53:33 -04:00
Cristian Toader
3802cae959 fixed compilation error on i386 linux by moving sandbox_cfg_t definition 2013-09-10 00:04:43 +03:00
Nick Mathewson
d91c776f61 Fix check-spaces 2013-09-09 16:00:40 -04:00
Nick Mathewson
49f9c4924e Fix compilation on OSX 2013-09-09 15:59:41 -04:00
Nick Mathewson
cc35d8be84 Fix most of the --enable-gcc-warnings warnings in the sandbox code 2013-09-09 15:14:50 -04:00
Nick Mathewson
00fd0cc5f9 Basic compilation fixes. 2013-09-09 14:55:47 -04:00
Cristian Toader
6a22b29641 passing hints as a const pointer to sandbox_getaddrinfo(), also one tor_free macro fails to compile.. 2013-09-06 12:39:56 +03:00
Cristian Toader
55d8b8e578 fixed bug where sandbox_getaddrinfo() would fail when -Sandbox is 0 2013-09-03 16:37:12 +03:00
Cristian Toader
b4b0eddd29 switched to a more generic way of handling the sandbox configuration 2013-09-02 13:54:43 +03:00
Cristian Toader
1ef0b2e1a3 changed how sb getaddrinfo works such that it supports storing multiple results 2013-09-02 11:44:04 +03:00
Cristian Toader
f93ba9a2ef documentation update for _array functions 2013-08-29 15:44:01 +03:00
Cristian Toader
d5f43b5254 _array filter functions now rely on final NULL parameter 2013-08-29 15:42:30 +03:00
Cristian Toader
ce04d2a622 replaced boolean char with int 2013-08-29 15:19:49 +03:00
Cristian Toader
8e2b9d2844 small fixes in documentation and sandbox_getaddrinfo() 2013-08-29 12:41:17 +03:00
Cristian Toader
6cae5d706c Added doxygen struct doc and replaced func() with funct(void) 2013-08-28 20:01:52 +03:00
Cristian Toader
8b8f87a06a removed PARAM_LEN 2013-08-28 19:56:42 +03:00
Cristian Toader
36aeca0ecf fix for getaddrinfo open syscall 2013-08-19 13:56:50 +03:00
Cristian Toader
372e0f91fd added comments for sandbox.h 2013-08-15 00:09:07 +03:00
Cristian Toader
8a85a48b9d attempt to add stat64 filename filters; failed due to getaddrinfo.. 2013-08-12 21:14:43 +03:00
Cristian Toader
44a4464cf6 fixed memory leak, added array filter support 2013-08-10 18:04:48 +03:00
Cristian Toader
a960e56c68 multi-configuration support using sandbox_t struct 2013-08-05 16:01:31 +03:00
Cristian Toader
356b646976 added execve and multi-configuration support 2013-08-05 15:40:23 +03:00
Cristian Toader
442f256f25 switched to a design using filters as function pointer arrays 2013-07-30 21:23:30 +03:00
Cristian Toader
871e5b35a8 small filter changes; openat as separate function 2013-07-30 19:25:56 +03:00
Cristian Toader
8022def6f0 added openat parameter filter 2013-07-29 16:30:39 +03:00
Cristian Toader
6d5b0367f6 Changes as suggested by nickm 
- char* to const char* and name refactoring
- workaround for accept4 syscall
 2013-07-29 14:46:47 +03:00
Cristian Toader
626a2b23de integrated context for dynamic filters 2013-07-25 14:08:02 +03:00
Cristian Toader
3dfe1c0639 initia stages of runtime dynamic filters 2013-07-25 13:25:20 +03:00
Cristian Toader
abe082e7d0 dynamic parameter filter bug fixes 2013-07-24 17:15:57 +03:00
Cristian Toader
962d814e52 dynamic parameter filter (prototype, not tested) 2013-07-24 17:06:06 +03:00
Cristian Toader
e1410f20d7 added support for multiple parameters 2013-07-23 14:22:31 +03:00
Cristian Toader
c15d09293b added experimental support for open syscall path param 2013-07-23 14:01:53 +03:00
Cristian Toader
8b12170f23 added support for numeric parameters, tested with rt_sigaction 2013-07-23 10:49:56 +03:00
Cristian Toader
7cf1dbfd51 changed paramfilter type to intptr_t 2013-07-23 10:14:25 +03:00