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