oss-security - Re: CVE request: kernel: SCTP memory corruption in HMAC handling

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Date: Mon, 4 Oct 2010 15:18:49 -0400 (EDT)
From: Josh Bressers <bressers@...hat.com>
To: oss-security@...ts.openwall.com
Cc: Eugene Teo <eugeneteo@...nel.sg>, coley <coley@...re.org>
Subject: Re: CVE request: kernel: SCTP memory corruption in
 HMAC handling

Please use CVE-2010-3705

Thanks.

-- 
    JB


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

> Reference:
> http://marc.info/?l=linux-kernel&m=128596992418814&w=2
> 
> When parsing a peer's supported HMAC authentication options in the
> sctp_auth_asoc_get_hmac() function, a malicious peer can craft their
> HMAC array in such a way as to cause memory corruption (out-of-bounds
> read followed by use of retrieved out-of-bounds data), which at the
> very least could cause a denial of service via kernel panic, and
> possibly worse.  It appears this could be triggered remotely when
> connecting to a malicious peer, or locally by a user acting as both
> endpoints.  In both cases, the "auth_enable" sysctl must be set in
> order to trigger the bug.
> 
> -Dan

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