CVE-2013-6663 in iOS
Summary
by MITRE
Use-after-free vulnerability in the SVGImage::setContainerSize function in core/svg/graphics/SVGImage.cpp in the SVG implementation in Blink, as used in Google Chrome before 33.0.1750.146, allows remote attackers to cause a denial of service or possibly have unspecified other impact via vectors related to the resizing of a view.
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Analysis
by VulDB Data Team • 02/20/2022
The CVE-2013-6663 vulnerability represents a critical use-after-free flaw within the Blink rendering engine's SVG image handling component. This vulnerability specifically affects the SVGImage::setContainerSize function located in core/svg/graphics/SVGImage.cpp, which is part of Google Chrome's web rendering architecture. The flaw manifests when the browser processes SVG images during view resizing operations, creating a scenario where memory that has been freed is subsequently accessed, leading to unpredictable behavior and potential system compromise.
The technical nature of this vulnerability stems from improper memory management within the SVG rendering pipeline. When an SVG image undergoes container size changes, the setContainerSize function fails to properly handle reference counting or memory deallocation sequences. This memory management failure creates a window where freed memory locations can be accessed by subsequent operations, resulting in a use-after-free condition. The vulnerability is particularly concerning because it can be triggered through crafted SVG content delivered via web pages, making it exploitable in remote attack scenarios without requiring user interaction beyond visiting a malicious website.
From an operational perspective, this vulnerability presents significant risks to browser security and system stability. The potential impact ranges from denial of service conditions where the browser crashes or becomes unresponsive to more severe consequences including arbitrary code execution. Attackers can leverage this flaw by embedding malicious SVG content in web pages that, when rendered, trigger the vulnerable code path during view resizing operations. The vulnerability affects versions of Google Chrome prior to 33.0.1750.146, representing a substantial attack surface given Chrome's widespread adoption across various platforms and user bases. This use-after-free condition aligns with CWE-416, which specifically addresses the use of freed memory, and demonstrates how improper memory management in graphics rendering components can create exploitable conditions.
The remediation strategy for CVE-2013-6663 primarily involves updating to Google Chrome version 33.0.1750.146 or later, which includes the necessary patches to address the memory management issues in the SVG implementation. Organizations should prioritize immediate deployment of this security update across all affected systems to mitigate the risk of exploitation. Additionally, browser vendors should implement additional memory safety checks and validation mechanisms within their rendering engines to prevent similar vulnerabilities from emerging in future implementations. The vulnerability highlights the importance of proper memory management practices in complex graphics rendering systems and underscores the need for comprehensive security testing of browser components that handle user-supplied content. This case study reinforces the principles outlined in the ATT&CK framework for browser exploitation techniques, particularly those involving memory corruption vulnerabilities in graphics rendering components that can be leveraged for privilege escalation or persistent access to affected systems.