87079 : Google WebP Image File Handling Integer Overflow Out-of-bounds Read Information Disclosure
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Disclosure Date
Time to Patch
16 days


Google WebP contains an integer overflow flaw in the 'ParseOptionalChunks' function in libwebp/dec/webp.c that is triggered when handling chunk sizes. With a specially crafted web page containing a WebP image, a context-dependent attacker can crash the browser or disclose memory contents. This flaw has been demonstrated as used in the Google Chrome web browser.


Location: Context Dependent
Attack Type: Input Manipulation
Impact: Loss of Integrity
Solution: Upgrade, Third-Party Solution
Exploit: Exploit Public
Disclosure: Vendor Verified, Coordinated Disclosure
OSVDB: Web Related


It has been reported that this issue has been fixed. Upgrade to version 0.2.1, or higher, to address this vulnerability.

Upgrade to Google Chrome version 23.0.1271.64 or higher, as it has been reported to fix this vulnerability. An upgrade is required as there are no known workarounds.


Google, Inc.
WebP (libwebp)



CVSSv2 Score

CVSSv2 Base Score = 7.5
Source: nvd.nist.gov | Generated: 2012-11-07 | Disagree? | There are 1 more: View All

Access_vector_2 Access_complexity_2 Authentication_2 Confidentiality_impact_1 Integrity_impact_1 Availability_impact_1


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