CVE-2011-2996 in Firefox
Summary
by MITRE
Unspecified vulnerability in the plugin API in Mozilla Firefox 3.6.x before 3.6.23 allows remote attackers to cause a denial of service (memory corruption and application crash) or possibly execute arbitrary code via unknown vectors.
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Analysis
by VulDB Data Team • 11/20/2021
The vulnerability identified as CVE-2011-2996 represents a critical security flaw within the plugin application programming interface of Mozilla Firefox version 3.6.x prior to 3.6.23. This issue resides in the browser's handling of plugin interactions and demonstrates the inherent risks associated with complex software components that interface with external code. The unspecified nature of the vulnerability vectors suggests that multiple attack surfaces within the plugin API could be exploited, making it particularly challenging for security teams to implement comprehensive protections without detailed analysis of the underlying mechanisms.
The technical flaw manifests through memory corruption issues that occur when Firefox processes plugin requests through its API. This type of vulnerability typically arises from inadequate input validation, improper memory management, or buffer overflow conditions within the plugin handling code. When exploited, these conditions can lead to unpredictable behavior including application crashes, memory corruption, and in more severe cases, arbitrary code execution capabilities. The memory corruption aspect specifically indicates that attackers can manipulate the browser's memory layout to execute malicious instructions, potentially allowing for privilege escalation or complete system compromise.
From an operational impact perspective, this vulnerability presents significant risks to organizations relying on Firefox 3.6.x browsers, particularly those that frequently use plugins or have users who might encounter malicious content. The denial of service component can disrupt business operations through browser crashes, while the potential for arbitrary code execution creates opportunities for persistent threats that could establish backdoors or exfiltrate sensitive data. Attackers leveraging this vulnerability could potentially gain control of user sessions, access confidential information, or deploy additional malware through the compromised browser environment. The widespread adoption of Firefox 3.6.x at the time of this vulnerability meant that many organizations were exposed to potential exploitation.
Organizations should prioritize immediate patch deployment to address this vulnerability, as the plugin API in Firefox 3.6.x through 3.6.22 contained multiple potential attack vectors that could be exploited by remote adversaries. Security teams should also implement network monitoring to detect potential exploitation attempts and consider temporary browser restrictions or plugin disablement as interim measures. The vulnerability aligns with CWE-119, which addresses "Improper Access to Memory" and represents a classic example of memory safety issues that have been the focus of numerous security standards and best practices. Mitigation strategies should include regular browser updates, application whitelisting, and enhanced user education regarding safe browsing practices to minimize exposure to such vulnerabilities.