CVE-2011-2376 in Firefox
Summary
by MITRE
Multiple unspecified vulnerabilities in the browser engine in Mozilla Firefox before 3.6.18 and Thunderbird before 3.1.11 allow 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 • 11/13/2021
The vulnerability identified as CVE-2011-2376 represents a critical security flaw affecting Mozilla Firefox versions prior to 3.6.18 and Thunderbird versions prior to 3.1.11. This issue resides within the browser engine component of these applications, specifically targeting the underlying rendering and processing mechanisms that handle web content. The vulnerability manifests through unspecified attack vectors that can be exploited by remote threat actors to compromise system integrity and user security. The affected software components operate at a foundational level within the browser architecture, making this flaw particularly dangerous as it can potentially lead to complete system compromise.
The technical nature of this vulnerability involves memory corruption issues that occur during the processing of malformed or malicious web content. These memory corruption flaws typically arise from inadequate input validation and memory management within the browser engine's codebase. When exploited, these vulnerabilities can cause unpredictable behavior including application crashes, memory leaks, or in more severe cases, arbitrary code execution capabilities. The unspecified nature of the attack vectors suggests that multiple distinct code paths within the browser engine could be compromised, making the vulnerability surface area particularly broad and difficult to fully characterize without detailed forensic analysis.
The operational impact of CVE-2011-2376 extends beyond simple denial of service conditions to potentially enable remote code execution, which represents a severe security risk for affected users. When successful, exploitation of this vulnerability can allow attackers to execute malicious code with the privileges of the affected application, potentially leading to complete system compromise. The memory corruption aspects of this vulnerability can result in unpredictable application behavior, making it difficult for users to determine when their systems may be compromised. These issues directly violate fundamental security principles and can be leveraged to establish persistent access to affected systems, particularly in environments where users frequently browse the internet or receive email communications.
Organizations and users affected by this vulnerability should prioritize immediate remediation through official software updates from Mozilla. The patching process should include updating both Firefox and Thunderbird applications to versions 3.6.18 and 3.1.11 respectively, which contain the necessary fixes for the identified memory corruption issues. Security teams should implement comprehensive monitoring to detect potential exploitation attempts and consider deploying additional defensive measures such as network segmentation and web filtering solutions. The vulnerability aligns with CWE-119 which addresses "Improper Restriction of Operations within the Bounds of a Memory Buffer" and represents a classic example of memory safety issues that fall under the ATT&CK technique T1059.007 for Command and Scripting Interpreter, as exploitation often involves crafting malicious web content to trigger the vulnerable code paths. Given the severity of potential remote code execution capabilities, organizations should also consider implementing temporary mitigations such as disabling potentially dangerous browser features or restricting access to untrusted web content until full patches are deployed across all affected systems.