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Date: Thu, 17 Sep 2009 10:28:23 +0200
From: Marcus Meissner <meissner@...e.de>
To: oss-security@...ts.openwall.com
Cc: "Steven M. Christey" <coley@...us.mitre.org>
Subject: Re: CVE request: kernel: perf_counter: Fix buffer overflow in perf_copy_attr()

On Wed, Sep 16, 2009 at 09:32:26PM -0400, Steven M. Christey wrote:
> 
> ======================================================
> Name: CVE-2009-3234
> Status: Candidate
> URL: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-3234
> Reference: MLIST:[linux-kernel] 20090916 [patch 15/45] perf_counter: Fix buffer overflow in perf_copy_attr()
> Reference: URL:http://article.gmane.org/gmane.linux.kernel/890654
> Reference: MLIST:[oss-security] 20090916 CVE request: kernel: perf_counter: Fix buffer overflow in perf_copy_attr()
> Reference: URL:http://www.openwall.com/lists/oss-security/2009/09/16/1
> Reference: BID:36423
> Reference: URL:http://www.securityfocus.com/bid/36423
> 
> Buffer overflow in the perf_copy_attr function in
> kernel/perf_counter.c in the Linux kernel 2.6.31-rc1 allows local
> users to cause a denial of service (crash) via a "big size data" to
> the perf_counter_open system call.

I think Brad Spengler has succeeded in exploiting this for code execution,
see his twitter timeline from yesterday http://twitter.com/spendergrsec

Ciao, Marcus

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