81952 : WebKit Worker Thread Bridge Object Handling Race Condition Use-after-free Issue
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Timeline

Disclosure Date
2012-04-03
Time to Patch
4 days

Description

WebKit contains a use-after-free error in the 'WorkerThreadableWebSocketChannel::Bridge' function when handling cases where inter-thread callbacks are not called due to worker run loop termination. 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: Race Condition
Impact: Loss of Integrity
Solution: Upgrade
Exploit: PoC Public
Disclosure: Vendor Verified, Coordinated Disclosure
OSVDB: Web Related

Solution

The vendor has released a patch to address this vulnerability. There are no known workarounds or upgrades to correct this issue. Check the vendor advisory, changelog, or solution in the references section for details.

Upgrade to Google Chrome version 19.0.1084.46 or higher, as it has been reported to fix this vulnerability. An upgrade is required as there are no known workarounds.

Products

Google, Inc.
Chrome
18.0.1025.168
The WebKitGTK+ Team
WebKitGTK+
Unspecified

References

Credit

CVSSv2 Score

CVSSv2 Base Score = 7.6
Source: nvd.nist.gov | Generated: 2012-05-16 | Disagree?

Access_vector_2 Access_complexity_0 Authentication_2 Confidentiality_impact_2 Integrity_impact_2 Availability_impact_2

Comments

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