[Full-disclosure] TPTI-10-16: VMWare VMnc Codec Frame Decompression Remote Code Execution Vulnerability
zdi-disclosures at tippingpoint.com
Fri Dec 3 18:08:47 GMT 2010
TPTI-10-16: VMWare VMnc Codec Frame Decompression Remote Code Execution Vulnerability
December 3, 2010
-- CVE ID:
-- Affected Vendors:
-- Affected Products:
VMWare, Inc. VMWare Workstation
VMWare, Inc. VMWare Server
VMWare, Inc. VMWare Player
VMWare, Inc. VMWare ACE
-- Vulnerability Details:
This vulnerability allows remote attackers to execute arbitrary code on
vulnerable installations of multiple VMWare products. User interaction
is required in that a user must visit a malicious web page or open a
malicious video file.
Upon installation VMWare Workstation, Server, Player, and ACE register
vmnc.dll as a video codec driver to handle compression and decompression
of the fourCC type 'VMnc'. This format is used primarily by Workstation
to capture remote framebuffer recordings of sessions within a virtual
machine. The resulting video is stored within an AVI container file.
While playing back such files the function responsible for handling
ICM_DECOMPRESS driver messages implicitly trusts a size value while
decompressing a frame. An attacker can utilize this to miscalculate a
destination pointer. This leads to the corruption of a heap buffer on a
later call to memcpy with user-controlled source data. This can be
leveraged to execute arbitrary code on the host system under the context
of the current user.
-- Vendor Response:
VMWare, Inc. has issued an update to correct this vulnerability. More
details can be found at:
-- Disclosure Timeline:
2010-06-16 - Vulnerability reported to vendor
2010-12-03 - Coordinated public release of advisory
This vulnerability was discovered by:
* Aaron Portnoy, TippingPoint DVLabs
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