CVE-2015-0815 in Firefox
Summary
by MITRE
Multiple unspecified vulnerabilities in the browser engine in Mozilla Firefox before 37.0, Firefox ESR 31.x before 31.6, and Thunderbird before 31.6 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 • 11/25/2025
The vulnerability identified as CVE-2015-0815 represents a critical security flaw affecting Mozilla Firefox and Thunderbird email clients across multiple versions. This issue resides within the browser engine component of these applications, specifically impacting versions prior to Firefox 37.0 and Firefox ESR 31.x before 31.6, as well as Thunderbird versions before 31.6. The vulnerability category encompasses multiple unspecified flaws that collectively create significant risks for users of affected software versions. These unspecified vectors indicate that attackers could exploit various entry points within the browser engine to compromise system integrity, making the attack surface particularly broad and difficult to predict.
The technical nature of this vulnerability manifests through memory corruption issues that can lead to application crashes or potentially enable arbitrary code execution. Memory corruption vulnerabilities typically occur when software improperly handles memory allocation and deallocation, allowing attackers to manipulate memory contents in ways that can alter program execution flow. Such flaws often arise from buffer overflows, use-after-free conditions, or other memory management errors within the browser engine's core components. The unspecified nature of the attack vectors suggests that multiple distinct code paths within the browser engine could be exploited, making comprehensive patching essential regardless of specific exploitation methods.
The operational impact of CVE-2015-0815 extends beyond simple denial of service scenarios to potentially enable remote code execution capabilities. When exploited successfully, these vulnerabilities could allow attackers to execute malicious code on affected systems, potentially leading to complete system compromise. The memory corruption aspects of the vulnerability create instability that could be leveraged to escalate privileges or bypass security controls. Organizations using affected versions face significant risks including data breaches, system infiltration, and potential lateral movement within network environments. The remote nature of these attacks means that exploitation could occur without user interaction, making the threat particularly dangerous for enterprise environments.
Security professionals should note that this vulnerability aligns with common attack patterns documented in the attack mitigation framework, particularly those involving browser-based exploitation techniques. The presence of multiple unspecified vectors suggests that this vulnerability may have been discovered through various testing methodologies including fuzzing, code review, or penetration testing. Organizations should prioritize immediate patching of affected systems to prevent exploitation. The vulnerability demonstrates the importance of maintaining current software versions and implementing robust patch management processes. According to industry standards, such memory corruption vulnerabilities typically fall under CWE categories related to memory safety issues and could be classified under ATT&CK techniques involving privilege escalation and code injection. Mitigation strategies should include not only patching but also network monitoring for suspicious activities and user education regarding the risks of visiting untrusted websites or opening malicious email attachments.