CVE-2014-1518 in Firefox
Summary
by MITRE
Multiple unspecified vulnerabilities in the browser engine in Mozilla Firefox before 29.0, Firefox ESR 24.x before 24.5, Thunderbird before 24.5, and SeaMonkey before 2.26 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-2014-1518 represents a critical security flaw affecting multiple Mozilla products including Firefox, Thunderbird, and SeaMonkey browsers. This issue resides within the browser engine's core components and affects versions prior to 29.0 for Firefox and Firefox ESR 24.x before 24.5, Thunderbird before 24.5, and SeaMonkey before 2.26. The vulnerability's classification as unspecified indicates that the exact technical details of the flaw were not publicly disclosed at the time of reporting, which is common for zero-day exploits that may be actively exploited in the wild. Such vulnerabilities typically arise from memory corruption issues that can be leveraged by malicious actors to gain unauthorized system access or disrupt normal application functionality.
The technical nature of this vulnerability manifests through memory corruption flaws that can trigger application crashes or potentially enable arbitrary code execution. Memory corruption vulnerabilities occur when an application writes data to memory locations it should not access or modifies memory in unexpected ways. These types of flaws often result from insufficient input validation, buffer overflows, or use-after-free conditions within the browser's rendering engine. The unspecified nature of the vectors suggests that attackers could exploit multiple distinct pathways within the browser engine, potentially including issues related to JavaScript execution, HTML parsing, or interaction with web content. The vulnerability's potential for remote code execution places it at the higher end of severity, as it could allow attackers to take complete control of affected systems without requiring user interaction beyond visiting a malicious website.
The operational impact of CVE-2014-1518 extends beyond simple denial of service scenarios to encompass potential full system compromise. When attackers can cause memory corruption leading to arbitrary code execution, they gain the ability to install malware, steal sensitive data, or establish persistent access to compromised systems. The vulnerability affects multiple Mozilla products simultaneously, amplifying its potential impact across different user bases and environments. Organizations running affected versions of these browsers face significant risk, particularly in enterprise environments where users may encounter malicious content through web browsing, email attachments, or compromised websites. The vulnerability's presence in both regular Firefox releases and Extended Support Release versions indicates that even organizations using long-term support versions are at risk, as these releases often maintain older codebases that may not receive immediate security updates.
Mitigation strategies for CVE-2014-1518 primarily focus on immediate software updates and patch management. Organizations should prioritize upgrading to affected Mozilla products to versions 29.0 or later for Firefox, 24.5 or later for Thunderbird, and 2.26 or later for SeaMonkey. The patching process should include thorough testing in controlled environments before deployment to ensure compatibility with existing applications and workflows. Additional defensive measures include implementing browser security enhancements such as sandboxing, content filtering, and web application firewalls to limit exposure to malicious content. Network administrators should consider deploying intrusion detection systems that can identify attempts to exploit known vulnerabilities, while security teams should monitor for indicators of compromise related to these specific vulnerability vectors. According to CWE classification, this vulnerability likely maps to CWE-119 Improper Access to Memory and CWE-787 Out-of-bounds Write, both of which are common in browser engine exploits. The ATT&CK framework would categorize this as a privilege escalation or code execution technique, potentially involving the use of exploit development frameworks and advanced persistent threat tactics to leverage the memory corruption for unauthorized system access.