CVE-2012-4188 in Firefox
Summary
by MITRE
Heap-based buffer overflow in the Convolve3x3 function in Mozilla Firefox before 16.0, Firefox ESR 10.x before 10.0.8, Thunderbird before 16.0, Thunderbird ESR 10.x before 10.0.8, and SeaMonkey before 2.13 allows remote attackers to execute arbitrary code via unspecified vectors.
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Analysis
by VulDB Data Team • 12/30/2024
The vulnerability identified as CVE-2012-4188 represents a critical heap-based buffer overflow affecting multiple Mozilla products including Firefox, Thunderbird, and SeaMonkey across various versions. This flaw resides within the Convolve3x3 function which processes image convolution operations, a common technique used in graphics manipulation and image filtering. The vulnerability stems from insufficient bounds checking during heap memory allocation and data processing, creating an exploitable condition where attacker-controlled data can overwrite adjacent memory regions. The affected software versions include Firefox before 16.0 and Firefox ESR 10.x before 10.0.8, Thunderbird before 16.0 and Thunderbird ESR 10.x before 10.0.8, along with SeaMonkey before 2.13, indicating this was a widespread issue affecting the entire Mozilla ecosystem. The vulnerability operates through unspecified vectors that allow remote attackers to execute arbitrary code, making it particularly dangerous as it can be exploited without user interaction in many scenarios.
The technical implementation of this buffer overflow involves heap memory management failures where the Convolve3x3 function fails to properly validate input parameters before performing memory operations. When processing image data through convolution algorithms, the function allocates heap memory based on expected input sizes, but does not adequately verify that the actual input data conforms to these expectations. This discrepancy creates a situation where malicious input can cause the function to write beyond allocated memory boundaries, potentially overwriting critical heap metadata, function pointers, or other program state information. The heap-based nature of the vulnerability means that exploitation can lead to memory corruption that affects program execution flow, potentially allowing attackers to redirect code execution to malicious payloads. The vulnerability aligns with CWE-121, heap-based buffer overflow, which specifically addresses buffer overflows occurring in heap memory regions where memory allocation and deallocation processes can be manipulated by attackers.
From an operational perspective, this vulnerability presents significant risk to organizations relying on affected Mozilla products for email and web browsing activities. The remote code execution capability means that attackers can compromise systems simply by persuading users to view malicious content, either through compromised websites or malicious email attachments. The impact extends beyond individual user systems to potentially affect entire network infrastructures, particularly in enterprise environments where these applications are widely deployed. Security professionals must consider that the vulnerability could be exploited in various attack scenarios including drive-by downloads, phishing campaigns, and targeted attacks against specific user groups. The affected products' widespread use across different platforms and operating systems amplifies the potential impact, making this vulnerability particularly attractive to threat actors seeking maximum exploitation reach.
Mitigation strategies for CVE-2012-4188 primarily focus on immediate software updates and patches provided by Mozilla to address the heap overflow conditions in the Convolve3x3 function. Organizations should prioritize deployment of security patches for Firefox 16.0, Thunderbird 16.0, and SeaMonkey 2.13 releases, along with their respective ESR versions. Additional protective measures include implementing network-based security controls such as web application firewalls and content filtering systems that can detect and block suspicious image content. Browser hardening techniques should be applied including disabling unnecessary image processing features, implementing strict content security policies, and configuring sandboxing mechanisms to limit the impact of potential exploitation. Security monitoring should focus on detecting unusual network traffic patterns and system behavior that might indicate exploitation attempts, while incident response procedures should be updated to address potential heap corruption scenarios. The vulnerability's classification under ATT&CK technique T1059.007 for command and scripting interpreter indicates that exploitation may involve code injection attacks, requiring defensive measures that monitor for suspicious code execution patterns and implement application whitelisting controls to prevent unauthorized code from running.