CVE-2011-3652 in Firefox
Summary
by MITRE
The browser engine in Mozilla Firefox before 8.0 and Thunderbird before 8.0 does not properly allocate memory, which allows remote attackers to cause a denial of service (memory corruption and application crash) or possibly execute arbitrary code via unspecified vectors.
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Analysis
by VulDB Data Team • 11/26/2021
The vulnerability identified as CVE-2011-3652 represents a critical memory allocation flaw within the browser engine of Mozilla Firefox versions prior to 8.0 and Thunderbird versions prior to 8.0. This issue stems from improper memory management practices that create conditions where malicious actors can manipulate the application's memory handling mechanisms to trigger unintended behavior. The flaw exists in the core rendering and processing components of these email and web browsers, making it particularly dangerous given their widespread use and the potential for exploitation through various attack vectors.
The technical nature of this vulnerability manifests through memory corruption that occurs during normal browser operations when processing specially crafted content. Attackers can exploit this weakness by delivering malicious web content or email messages that trigger specific memory allocation patterns, leading to memory corruption that can result in application crashes or more severe consequences including arbitrary code execution. The vulnerability's classification as a memory corruption issue aligns with CWE-122, which describes improper restriction of operations within the bounds of a memory buffer, and potentially CWE-787, which covers out-of-bounds write operations. The memory allocation flaw creates opportunities for attackers to manipulate heap memory structures through techniques such as buffer overflows or use-after-free conditions that are commonly leveraged in advanced persistent threats.
From an operational perspective, this vulnerability poses significant risks to organizations and individual users who rely on these browsers for daily operations. The potential for remote code execution means that attackers could gain full control of affected systems, making this a critical concern for enterprise security. The denial of service aspect alone could disrupt business operations through application crashes, while the arbitrary code execution capability provides a pathway for more sophisticated attacks including data exfiltration, system compromise, and lateral movement within network environments. The vulnerability's impact extends beyond individual users to enterprise environments where these browsers are commonly used for email processing and web browsing activities, creating potential attack vectors for targeted campaigns.
The exploitation of CVE-2011-3652 aligns with various tactics described in the MITRE ATT&CK framework, particularly those related to privilege escalation and execution through browser-based attacks. The vulnerability's characteristics make it suitable for initial access vectors through phishing campaigns or compromised websites, where attackers can deliver malicious content that triggers the memory corruption. Security professionals should note that this vulnerability represents a classic example of how memory safety issues can create persistent security risks, particularly in complex software environments like web browsers. The remediation approach involves immediate patching of affected versions to address the underlying memory allocation implementation flaws, with additional network-level protections including web application firewalls and content filtering systems to provide defense-in-depth measures against exploitation attempts.
Organizations should prioritize updating to Firefox 8.0 and Thunderbird 8.0 versions that contain the necessary memory management fixes to address this vulnerability. The patching process should include comprehensive testing to ensure compatibility with existing applications and workflows while maintaining security posture. Security monitoring should focus on detecting potential exploitation attempts through network traffic analysis and application behavior monitoring to identify any malicious activity targeting this vulnerability. The vulnerability serves as a reminder of the critical importance of maintaining up-to-date software and implementing robust security practices to prevent exploitation of memory corruption vulnerabilities that can lead to complete system compromise.