84375 : Google Chrome PDF Viewer Corrupt Object '0' Reference Use-after-free Issue
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Views This Week	Views All Time	Added to OSVDB	Last Modified	Modified (since 2008)	Percent Complete
9	393	10 months ago	16 days ago	3 times	100%

Timeline

Disclosure Date
2012-07-31

Time to Patch
34 days

Description

Google Chrome contains a use-after-free error in the PDF viewer when handling corrupted references to object '0'. With a specially crafted PDF file, a context-dependent attacker can dereference already freed memory and potentially execute arbitrary code.

Classification

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

Solution

Upgrade to version 21.0.1180.57 or higher for Mac and Linux or 21.0.1180.60 or higher for Windows and Chrome Frame, as they have been reported to fix this vulnerability. An upgrade is required as there are no known workarounds.

Products

Google, Inc.

Chrome

20.0.1132.57

References

CVE ID: 2012-2855 (see also: NVD)
Secunia Advisory ID: 50105 50337
Bugtraq ID: 54749
Related OSVDB ID: 84366 84367 84368 84369 84370 84371 84372 84373 84374 84376 84377 84378 84379 84380
Vendor Specific News/Changelog Entry: http://googlechromereleases.blogspot.com/2012/07/stable-channel-release.html
Vendor Specific Advisory URL: http://www.srware.net/forum/viewtopic.php?f=18&t=4269
https://code.google.com/p/chromium/issues/detail?id=134888

Credit

CVSSv2 Score

CVSSv2 Base Score = 6.8
Source: nvd.nist.gov | Generated: 2012-08-07 | Disagree?

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