CVE-2012-5842 in Firefox
Summary
by MITRE
Multiple unspecified vulnerabilities in the browser engine in Mozilla Firefox before 17.0, Firefox ESR 10.x before 10.0.11, Thunderbird before 17.0, Thunderbird ESR 10.x before 10.0.11, and SeaMonkey before 2.14 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 • 01/31/2018
The vulnerability identified as CVE-2012-5842 represents a critical security flaw affecting multiple Mozilla products including Firefox, Thunderbird, and SeaMonkey across their respective versions. This vulnerability resides within the browser engine component that processes web content and handles various multimedia elements, making it a prime target for exploitation by malicious actors seeking to compromise user systems. The affected versions spanned a significant timeframe from Firefox 16.0 and earlier through the corresponding Thunderbird and SeaMonkey releases, indicating a widespread exposure across the Mozilla ecosystem. The nature of the vulnerability is particularly concerning as it encompasses multiple unspecified attack vectors that can lead to either denial of service conditions or more severe arbitrary code execution capabilities.
The technical flaw manifests as memory corruption issues within the browser engine's handling of various input sources and multimedia content. This type of vulnerability typically arises from improper memory management practices where the application fails to properly validate or sanitize input data before processing it. The memory corruption can occur during parsing of web pages, handling of multimedia files, or processing of specially crafted content designed to trigger buffer overflows or other memory-related anomalies. When these conditions are exploited, they can cause the browser application to crash unpredictably or potentially allow attackers to inject and execute malicious code within the context of the running browser process. The unspecified nature of the attack vectors suggests that multiple code paths within the browser engine could be affected, making the vulnerability particularly difficult to defend against through simple patching strategies.
The operational impact of CVE-2012-5842 extends beyond simple application crashes to potentially enable full system compromise when exploited successfully. The vulnerability's ability to cause memory corruption and arbitrary code execution creates a pathway for attackers to gain persistent access to vulnerable systems, escalate privileges, and potentially establish backdoors for continued unauthorized access. This makes the vulnerability particularly dangerous in enterprise environments where users may be running outdated versions of these applications, or where patch management processes are delayed. The denial of service aspect alone can be leveraged to disrupt legitimate business operations through repeated application crashes that prevent users from accessing critical web-based services or applications. Organizations using these affected products face significant risk of data breaches, system compromise, and operational disruption.
Mitigation strategies for CVE-2012-5842 primarily focus on immediate software updates and patch deployment across all affected Mozilla products. The recommended approach involves upgrading to the patched versions of Firefox 17.0, Thunderbird 17.0, and SeaMonkey 2.14, along with their respective ESR versions. Organizations should implement comprehensive patch management procedures to ensure all vulnerable systems are updated promptly, as the vulnerability's exploitation potential increases with the prevalence of unpatched systems. Additional defensive measures include implementing network-based security controls such as web application firewalls and content filtering systems that can detect and block known malicious patterns. The vulnerability aligns with CWE-125, which describes out-of-bounds read conditions, and CWE-787, which covers out-of-bounds write vulnerabilities, both of which are common indicators of memory corruption flaws. From an ATT&CK framework perspective, this vulnerability maps to techniques involving privilege escalation and persistent threat capabilities, as attackers can leverage the arbitrary code execution to establish long-term access to compromised systems. Network administrators should also consider implementing browser hardening measures and restricting user privileges to minimize the potential impact of successful exploitation attempts.