CVE-2015-4513 in Firefox
Summary
by MITRE
Multiple unspecified vulnerabilities in the browser engine in Mozilla Firefox before 42.0 and Firefox ESR 38.x before 38.4 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 • 10/23/2024
The vulnerability identified as CVE-2015-4513 represents a critical security flaw within the browser engine of Mozilla Firefox versions prior to 42.0 and Firefox ESR 38.x versions prior to 38.4. This issue falls under the category of unspecified vulnerabilities, indicating that the specific technical details of the flaw were not fully disclosed in the initial reporting. The vulnerability exists within the core rendering and processing components of the Firefox browser engine, which is responsible for interpreting and displaying web content. These components are particularly sensitive because they handle untrusted input from web pages, making them prime targets for exploitation by malicious actors seeking to compromise user systems. The affected browser engine components include the JavaScript engine, layout engine, and various parsing modules that process HTML, CSS, and JavaScript content.
The technical nature of this vulnerability manifests through memory corruption issues that can lead to application crashes or potentially allow for arbitrary code execution. Memory corruption vulnerabilities typically occur when software writes data to memory locations outside of the intended boundaries, causing unpredictable behavior in the application. In the context of web browsers, these issues often arise from improper handling of user-supplied data during parsing operations, buffer overflows, or use-after-free conditions within the browser engine's memory management systems. The unspecified nature of the exact vectors suggests that multiple distinct code paths within the browser engine could be exploited, making the vulnerability particularly dangerous as it may be triggerable through various web page constructs. This type of vulnerability is commonly classified under CWE-121, which deals with stack-based buffer overflow conditions, or CWE-122, which covers heap-based buffer overflow conditions, both of which are prevalent in browser engine implementations.
The operational impact of CVE-2015-4513 extends beyond simple denial of service scenarios, as the potential for arbitrary code execution presents significant risks to user security and system integrity. Attackers could leverage this vulnerability to execute malicious code on targeted systems, potentially leading to full system compromise, data exfiltration, or the installation of persistent malware. The memory corruption aspects of this vulnerability make it particularly challenging to detect and prevent, as the exploitation may not always result in immediate crashes but could manifest through subtle memory manipulation that allows for more sophisticated attack vectors. The vulnerability affects both regular Firefox releases and the Extended Support Release (ESR) versions, indicating it impacts a broad user base including enterprise environments that rely on ESR versions for stability and security. This widespread impact makes the vulnerability particularly concerning from a threat landscape perspective, as it could be exploited in targeted attacks against organizations using these vulnerable browser versions, potentially leading to significant security breaches and data loss incidents.
Mitigation strategies for CVE-2015-4513 primarily focus on immediate browser version updates to the patched releases of Firefox 42.0 and Firefox ESR 38.4. Organizations should implement comprehensive patch management procedures to ensure all affected systems are updated promptly, as the vulnerability's potential for remote code execution makes it critical to address immediately. Browser vendors recommend enabling automatic updates where possible to prevent exploitation through outdated software versions. Additional defensive measures include implementing web content filtering solutions, employing sandboxing technologies, and utilizing security extensions that can help detect and block malicious web content. From an operational security standpoint, organizations should conduct vulnerability assessments to identify all systems running affected Firefox versions and prioritize remediation efforts accordingly. The vulnerability's classification under the ATT&CK framework would likely map to techniques such as T1059.007 for script-based attacks and T1203 for exploitation of software vulnerabilities, highlighting the multi-faceted nature of potential attack vectors. Security teams should also monitor for indicators of compromise related to this vulnerability, including unusual network traffic patterns or system behavior that might indicate exploitation attempts, as the memory corruption aspects may leave subtle traces that could be detected through proper monitoring procedures.