CVE-2009-3979 in Firefox
Summary
by MITRE
Multiple unspecified vulnerabilities in the browser engine in Mozilla Firefox before 3.0.16 and 3.5.x before 3.5.6, SeaMonkey before 2.0.1, and Thunderbird 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 • 08/30/2021
The vulnerability described in CVE-2009-3979 represents a critical class of security flaws affecting multiple Mozilla applications including Firefox browser engine components, SeaMonkey, and Thunderbird email clients. These vulnerabilities exist within the core browser engine that processes web content and handles various data inputs from network sources. The affected versions span across Firefox 3.0.x series before 3.0.16 and 3.5.x series before 3.5.6, along with SeaMonkey versions prior to 2.0.1 and Thunderbird releases before their respective patches. The unspecified nature of the exact vulnerability vectors makes this issue particularly concerning as it could encompass multiple attack surfaces within the browser engine's memory management and data processing mechanisms.
The technical flaw manifests through memory corruption issues that occur when the affected applications process certain malformed or malicious inputs from web pages or email content. These memory corruption vulnerabilities typically arise from inadequate input validation, buffer overflows, or improper memory handling within the browser engine's rendering and processing components. The vulnerabilities are classified under CWE-119 which encompasses weaknesses related to memory safety and buffer management issues in software applications. When exploited, these flaws can cause applications to crash or become unresponsive, leading to denial of service conditions, or in more severe cases, allow remote attackers to execute arbitrary code on affected systems.
The operational impact of CVE-2009-3979 extends beyond simple application instability to potentially compromise entire user systems. The denial of service aspect can be leveraged by attackers to disrupt legitimate users' access to web services or email functionality, while the potential for arbitrary code execution creates a serious threat vector for system compromise. Attackers can craft malicious web pages or email content that, when processed by vulnerable applications, triggers the memory corruption conditions. This vulnerability aligns with ATT&CK technique T1203 which describes exploitation of software vulnerabilities to gain system access, and specifically targets the browser engine as a primary attack surface. The impact affects both desktop and mobile users who rely on these applications for internet browsing and email operations, making it a widespread concern for organizations and individual users alike.
Mitigation strategies for this vulnerability require immediate application of security patches provided by Mozilla and other affected vendors. System administrators should prioritize updating all affected Mozilla applications to their patched versions, ensuring that Firefox 3.0.16 or later, Firefox 3.5.6 or later, SeaMonkey 2.0.1 or later, and Thunderbird versions with the appropriate security fixes are deployed across all user systems. Additional protective measures include implementing browser security configurations that limit the execution of potentially malicious content, deploying intrusion detection systems to monitor for exploitation attempts, and maintaining network-based security controls that can detect and block malicious traffic patterns associated with these vulnerabilities. Organizations should also consider implementing security awareness training to help users recognize potentially malicious web content and email attachments that could exploit these memory corruption flaws.