84377 : WebKit ProcessingInstruction::removedFrom Use-after-free Issue
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Timeline

Disclosure Date
2012-07-19

Description

WebKit contains a use-after-free error in the 'ProcessingInstruction::removedFrom' function [WebCore/dom/ProcessingInstruction.cpp]. The issue is triggered when a ProcessingInstruction is removed from the document as the owner is removed, but the style resolver may not be updated. With a specially crafted web page, 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: PoC Public
Disclosure: Vendor Verified, Coordinated Disclosure
OSVDB: Web Related

Solution

It has been reported that this issue has been fixed. Upgrade to version 1.10.0, or higher, to address this vulnerability. An upgrade is required as there are no known workarounds.

Upgrade to Google Chrome 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.

Products

Google, Inc.
Chrome
20.0.1132.57
The WebKitGTK+ Team
WebKitGTK+
1.8.2
Apple Inc.
Safari
6.0.2
6.0.3 (not affected)
iTunes
11.0.2
11.0.3 (not affected)
10.0.2

References

Credit

CVSSv2 Score

CVSSv2 Base Score = 6.8
Source: nvd.nist.gov | Generated: 2012-08-07 | Disagree? | There are 1 more: View All

Access_vector_2 Access_complexity_1 Authentication_2 Confidentiality_impact_1 Integrity_impact_1 Availability_impact_1

Comments

No Comments.

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