62949 : WebKit Image form.property Syntax Handling Use-after-free Arbitrary Code Execution
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Timeline

Disclosure Date
2010-01-25

Description

WebKit contains a use-after-free error in WebCore/html/HTMLImageElement.cpp, as an image may remain accessible via form.property syntax after having been removed. 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 1.2.0, or higher, to address this vulnerability.

Upgrade to Apple Safari version 4.0.5 or higher, as it has been reported to fix this vulnerability. Google Chrome version 4.0.249.89 also seems to silently address the vulnerability. An upgrade is required as there are no known workarounds.

Products

Apple Inc.
Safari
4
4 Beta
4.0.1
4.0.2
4.0.3
4.0.4

References

Tools & Filters

45045

Credit

CVSSv2 Score

CVSSv2 Base Score = 9.3
Source: nvd.nist.gov | Generated: 2010-03-15 | Disagree?

Access_vector_2 Access_complexity_1 Authentication_2 Confidentiality_impact_2 Integrity_impact_2 Availability_impact_2

Comments

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