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TITLE:
NetBSD "azalia" and "hdaudio" Drivers Array Indexing Vulnerabilities

SECUNIA ADVISORY ID:
SA38284

VERIFY ADVISORY:
http://secunia.com/advisories/38284/

DESCRIPTION:
NetBSD has acknowledged some vulnerabilities in the azalia(4) and
hdaudio(4) drivers, which can be exploited by malicious, local users
to cause a DoS (Denial of Service).

The vulnerabilities are caused due to an array indexing error within
the "azalia_query_devinfo()" function in src/sys/dev/pci/azalia.c and
the "hdaudio_afg_query_devinfo()" function in
src/sys/dev/pci/hdaudio/hdaudio_afg.c, which can be exploited to e.g.
cause a kernel crash.

Successful exploitation requires that at least one azalia(4) or
hdaudio(4) device is available and configured.

SOLUTION:
Fixed in the CVS repository. See vendor's advisory for details.

PROVIDED AND/OR DISCOVERED BY:
The vendor credits Pierre Pronchery.

ORIGINAL ADVISORY:
NetBSD-SA2010-003:
http://ftp.netbsd.org/pub/NetBSD/security/advisories/NetBSD-SA2010-003.txt.asc

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