A vulnerability was found in WebkitGTK+ 2.2.3 (Web Browser) and classified as critical. Affected by this issue is the function RenderScrollbar::updateScrollbarPart of the file rendering/RenderScrollbar.cpp of the component Scrollbar Handler. The manipulation with an unknown input leads to a memory corruption vulnerability. Using CWE to declare the problem leads to CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. Impacted is confidentiality, integrity, and availability.

The weakness was released 12/15/2013 as 125702 (Website). The advisory is shared for download at bugs.webkit.org. The exploitation is known to be difficult. The attack may be launched remotely. No form of authentication is required for exploitation. Technical details as well as a public exploit are known.

It is declared as proof-of-concept.

Applying a patch is able to eliminate this problem. The bugfix is ready for download at trac.webkit.org. A possible mitigation has been published immediately after the disclosure of the vulnerability. The advisory contains the following remark:

Simplify the logic for needRenderer a bit. Use initializeStyle rather than setStyle when first creating the RenderScrollbarPart. Also use add and take properly so we don't do extra hash lookups the old code did with get/set and get/remove.

Productinfo

Type

• Web Browser

Name

• WebkitGTK+

Version

• 2.2.3

License

• open-source

CPE 2.3info

• 🔍

CPE 2.2info

• 🔍

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