CVE-2011-1201 in Chrome
Summary
by MITRE
The context implementation in WebKit, as used in Google Chrome before 10.0.648.127, allows remote attackers to cause a denial of service or possibly have unspecified other impact via unknown vectors that lead to a "stale pointer."
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Analysis
by VulDB Data Team • 01/14/2025
The vulnerability identified as CVE-2011-1201 represents a critical memory safety issue within the WebKit rendering engine that powers Google Chrome browser. This flaw manifests in the context implementation component where improper memory management leads to the creation of stale pointers that can be exploited by remote attackers. The vulnerability affects Chrome versions prior to 10.0.648.127, making it a significant concern for users running older browser versions. The issue stems from how WebKit handles memory contexts and pointer references during dynamic content rendering, creating opportunities for malicious actors to manipulate memory states through carefully crafted web content. Such vulnerabilities are particularly dangerous because they can be triggered through standard web browsing activities without requiring any special privileges or user interaction beyond visiting a malicious website.
The technical nature of this vulnerability places it squarely within the realm of memory corruption flaws, specifically related to pointer management and context handling within the browser's rendering engine. A stale pointer occurs when a program continues to reference memory that has been freed or reallocated, leading to unpredictable behavior that can manifest as crashes, data corruption, or potentially arbitrary code execution. This type of vulnerability is classified under CWE-466 as "Use of Out-of-Range Pointer Index" and falls within the broader category of memory safety issues that have been extensively documented in cybersecurity literature. The exploitation of stale pointers in browser contexts often follows patterns described in the attack techniques catalogued under ATT&CK tactic TA0005 - Defense Evasion and TA0004 - Privilege Escalation, where attackers leverage memory corruption to bypass security mechanisms or escalate privileges. The impact extends beyond simple denial of service to potentially enable more sophisticated attacks depending on the specific memory layout and exploitation conditions.
The operational impact of CVE-2011-1201 creates significant risk for organizations and individual users who may be running outdated browser versions. Remote attackers can leverage this vulnerability to cause browsers to crash or behave unpredictably, effectively creating denial of service conditions that disrupt user productivity and access to web services. However, the unspecified other impacts mentioned in the vulnerability description suggest that the potential for more serious consequences cannot be ruled out, including information disclosure or privilege escalation opportunities that could allow attackers to execute arbitrary code on affected systems. The vulnerability's exploitation potential aligns with ATT&CK technique T1059 - Command and Scripting Interpreter and T1070 - Indicator Removal on Host, as attackers might use such memory corruption vulnerabilities to establish persistent access or hide their activities within compromised systems. Organizations running affected Chrome versions face increased risk of targeted attacks and should consider immediate remediation actions.
Mitigation strategies for CVE-2011-1201 center on immediate browser updates to versions that contain the necessary security patches. The most effective defense involves updating to Chrome 10.0.648.127 or later, which includes fixes addressing the stale pointer handling in WebKit's context implementation. System administrators should implement automated update mechanisms to ensure all browser instances are promptly patched, as this vulnerability could be exploited in targeted attacks against specific user populations. Additional protective measures include deploying web application firewalls, implementing strict content security policies, and using sandboxing technologies that limit the potential impact of successful exploitation attempts. The vulnerability demonstrates the importance of keeping browser software updated and highlights the need for organizations to maintain comprehensive patch management processes. Security monitoring should include detection of attempts to exploit memory corruption vulnerabilities through network traffic analysis and system log review to identify potential exploitation attempts before they can cause significant damage.