CVE-2012-2888 in Chrome
Summary
by MITRE
Use-after-free vulnerability in Google Chrome before 22.0.1229.79 allows remote attackers to cause a denial of service or possibly have unspecified other impact via vectors involving SVG text references.
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Analysis
by VulDB Data Team • 12/14/2021
The CVE-2012-2888 vulnerability represents a critical use-after-free flaw in Google Chrome versions prior to 22.0.1229.79 that specifically targets the browser's handling of Scalable Vector Graphics text references. This vulnerability falls under the CWE-416 category of Use After Free, which occurs when a program continues to reference memory after it has been freed, potentially leading to unpredictable behavior and exploitation opportunities. The flaw manifests in Chrome's rendering engine when processing SVG elements that contain text references, creating a scenario where memory allocated for text rendering operations becomes accessible after deletion.
The technical exploitation of this vulnerability involves crafting malicious SVG content that triggers improper memory management during text reference processing. When Chrome encounters such malformed SVG text references, the browser's memory management system frees certain memory regions while still maintaining references to them. Attackers can leverage this condition to manipulate the freed memory through carefully constructed payloads that may cause the browser to execute arbitrary code or trigger denial of service conditions. The vulnerability's remote exploitation capability means attackers can deliver malicious SVG content through web pages, email attachments, or other network-delivered content without requiring user interaction beyond visiting a compromised website.
The operational impact of CVE-2012-2888 extends beyond simple denial of service scenarios to potentially enable arbitrary code execution within the context of the affected browser process. This represents a significant security risk as successful exploitation could allow attackers to bypass security boundaries and execute malicious code on vulnerable systems. The vulnerability affects the core rendering functionality of Chrome, making it particularly dangerous since it can be triggered through normal web browsing activities. The use-after-free condition creates opportunities for attackers to perform memory corruption attacks that align with techniques described in the attack pattern taxonomy under ATT&CK framework's T1059.007 for command and scripting interpreter and T1068 for exploit for privilege escalation.
Mitigation strategies for CVE-2012-2888 primarily focus on immediate browser updates to versions 22.0.1229.79 and later, which contain the necessary patches to address the memory management issues in SVG text reference handling. Organizations should implement comprehensive patch management processes to ensure all affected Chrome installations are updated promptly. Additionally, network administrators can deploy content filtering solutions to block potentially malicious SVG content and implement web application firewalls that can detect and prevent exploitation attempts. The vulnerability demonstrates the importance of proper memory management in browser engines and highlights the need for regular security assessments of rendering components. Security teams should also consider implementing browser hardening measures such as sandboxing and privilege separation to limit the potential impact of successful exploitation attempts. This vulnerability serves as a reminder of the critical nature of memory safety in browser security and the necessity of continuous security monitoring and patch deployment for web browsers.