Re: CVE request: kernel: perf_counter: Fix buffer overflow in perf_copy_attr()

[Marcus Meissner <meissner () suse de>]

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