Openwall GNU/*/Linux - a small security-enhanced Linux distro for servers
[<prev] [next>] [<thread-prev] [day] [month] [year] [list]
Date: Fri, 22 Oct 2010 10:38:52 -0400 (EDT)
From: Josh Bressers <bressers@...hat.com>
To: oss-security@...ts.openwall.com
Cc: coley <coley@...re.org>
Subject: Re: CVE request: kernel: heap overflow in TIPC

Please use CVE-2010-3859

Thanks.

-- 
    JB


----- "Dan Rosenberg" <dan.j.rosenberg@...il.com> wrote:

> The tipc_msg_build() function in net/tipc/msg.c contains an
> exploitable kernel heap overflow that would allow a local user to
> escalate privileges to root by issuing maliciously crafted sendmsg()
> calls via TIPC sockets.
> 
> Fortunately, none of the distributions I tested actually define a
> module alias for TIPC even though it is compiled as a module on
> nearly
> all of them (I suspect this is a lucky accident).  Since in these
> situations, the TIPC module will not be loaded automatically on
> creation of a TIPC socket, an administrator would have had to
> explicitly load the TIPC kernel module in order for a system to be
> vulnerable.
> 
> I checked Ubuntu, Debian, and Fedora, none of which define an alias.
> Any distributions that define a module alias for TIPC (i.e. "alias
> net-pf-30 tipc") should treat this as a serious vulnerability.  Even
> if your distribution does not, I highly recommend backporting the fix
> for this, since it's a bit of defensive programming in the core
> networking code that handles verifying user-supplied iovecs, which
> likely resolves other undiscovered (or undisclosed) security issues
> elsewhere.  I'll post a link to the fix when it's finalized and
> committed.
> 
> Reference:
> http://marc.info/?l=linux-netdev&m=128770476511716&w=2
> 
> -Dan

Powered by blists - more mailing lists

Your e-mail address:

Please check out the Open Source Software Security Wiki, which is counterpart to this mailing list.

Confused about mailing lists and their use? Read about mailing lists on Wikipedia and check out these guidelines on proper formatting of your messages.