CVE-2012-2824 in WebKitGTK+
Summary
by MITRE
Use-after-free vulnerability in Google Chrome before 20.0.1132.43 allows remote attackers to cause a denial of service or possibly have unspecified other impact via vectors related to SVG painting.
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Analysis
by VulDB Data Team • 05/11/2021
The vulnerability identified as CVE-2012-2824 represents a critical use-after-free flaw in Google Chrome versions prior to 20.0.1132.43, specifically impacting the browser's handling of Scalable Vector Graphics content during rendering operations. This vulnerability falls under the CWE-416 category, which encompasses use-after-free conditions where memory is accessed after it has been freed, creating potential exploitation vectors for remote attackers. The flaw manifests within Chrome's SVG painting subsystem, where improper memory management during graphics rendering processes creates opportunities for malicious actors to manipulate memory states and potentially execute arbitrary code.
The technical exploitation of this vulnerability occurs when Chrome processes SVG elements that trigger specific painting operations, leading to a scenario where memory allocated for SVG rendering components becomes freed while still being referenced by subsequent operations. This memory corruption can be leveraged by remote attackers through crafted malicious web content that contains specially constructed SVG elements designed to trigger the vulnerable code path. The attack vector typically involves delivering malicious SVG content through web pages that, when rendered by the affected browser version, cause the browser to free memory associated with SVG objects while maintaining references to that memory, resulting in unpredictable behavior.
The operational impact of this vulnerability extends beyond simple denial of service conditions to potentially enable more severe consequences including arbitrary code execution and complete browser compromise. When exploited successfully, attackers can manipulate the browser's memory management system to redirect execution flow or inject malicious code into the browser process, effectively compromising the user's system. The vulnerability's remote nature means that attackers need only convince victims to visit malicious websites or view compromised content through email attachments, making it particularly dangerous in real-world scenarios. The unspecified other impacts mentioned in the CVE description suggest potential for privilege escalation or information disclosure, though the primary concern remains the potential for remote code execution.
Mitigation strategies for CVE-2012-2824 primarily focus on immediate browser updates to versions 20.0.1132.43 or later, which contain patches addressing the underlying memory management issues in the SVG rendering engine. Organizations should implement comprehensive patch management procedures to ensure all affected systems receive updates promptly, as the vulnerability affects a widely used browser with significant attack surface. Additional defensive measures include implementing web content filtering solutions that can identify and block suspicious SVG content, deploying browser security extensions that provide additional sandboxing protections, and establishing monitoring procedures to detect potential exploitation attempts. Security teams should also consider implementing network-based intrusion detection systems that can identify traffic patterns associated with known exploitation techniques for this vulnerability, aligning with ATT&CK framework techniques related to defense evasion and privilege escalation through browser-based attacks.