CVE-2007-3735 in Firefox
Summary
by MITRE
Multiple unspecified vulnerabilities in the JavaScript engine in Mozilla Firefox before 2.0.0.5 and Thunderbird before 2.0.0.5 allow remote attackers to cause a denial of service (crash) via unspecified vectors that trigger memory corruption.
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Analysis
by VulDB Data Team • 07/22/2019
The vulnerability identified as CVE-2007-3735 represents a critical memory corruption issue within the JavaScript engine of Mozilla Firefox and Thunderbird products. This flaw exists in versions prior to 2.0.0.5 and affects the underlying JavaScript engine implementation that processes web content and email messages. The vulnerability manifests through unspecified attack vectors that can trigger memory corruption conditions, leading to application instability and potential system crashes.
The technical nature of this vulnerability falls under memory corruption patterns that are commonly categorized as CWE-122, which deals with heap-based buffer overflows, or CWE-125, which addresses out-of-bounds reads. These types of vulnerabilities occur when the JavaScript engine fails to properly validate memory access during script execution, allowing attackers to manipulate memory structures through crafted malicious content. The JavaScript engine's handling of dynamic memory allocation and deallocation becomes compromised, creating opportunities for attackers to inject malicious code or cause unintended memory behavior.
From an operational perspective, this vulnerability creates significant risk for end users who rely on Firefox and Thunderbird for daily operations. The remote attack vector means that malicious actors can exploit this weakness simply by crafting specially formatted web pages or email content that triggers the JavaScript engine's flawed memory handling. When exploited, the vulnerability results in denial of service conditions where the applications crash and become unavailable to users, effectively preventing normal communication and browsing activities. This type of attack aligns with ATT&CK technique T1499.004, which covers network denial of service attacks through application-level exploitation.
The impact extends beyond simple application crashes as these vulnerabilities can potentially be escalated to more severe exploits. Attackers may leverage the memory corruption to execute arbitrary code on vulnerable systems, particularly when combined with other exploitation techniques. The vulnerability's presence in both Firefox and Thunderbird indicates a fundamental flaw in the shared JavaScript engine component, suggesting that organizations using either application are at risk. Organizations should note that this vulnerability affects not only individual user systems but also enterprise environments where these applications are widely deployed for email and web browsing functions.
Mitigation strategies for CVE-2007-3735 primarily focus on immediate patch application and system hardening measures. The most effective solution involves upgrading to Firefox 2.0.0.5 or later versions and Thunderbird 2.0.0.5 or later, which contain the necessary fixes for the JavaScript engine memory corruption issues. Organizations should implement comprehensive patch management procedures to ensure all systems receive updates promptly. Additionally, network administrators can deploy intrusion prevention systems that monitor for known malicious patterns and consider implementing content filtering solutions that can detect and block potentially harmful JavaScript content. The vulnerability's nature also suggests that implementing sandboxing mechanisms and restricting JavaScript execution in high-risk environments could provide additional protective layers against exploitation attempts.