CVE-2014-8643 in Firefox
Summary
by MITRE
Mozilla Firefox before 35.0 on Windows allows remote attackers to bypass the Gecko Media Plugin (GMP) sandbox protection mechanism by leveraging access to the GMP process, as demonstrated by the OpenH264 plugin s process.
If you want to get the best quality for vulnerability data then you always have to consider VulDB.
Analysis
by VulDB Data Team • 03/02/2022
The vulnerability identified as CVE-2014-8643 represents a critical sandbox escape flaw in Mozilla Firefox versions prior to 35.0 on Windows operating systems. This vulnerability specifically targets the Gecko Media Plugin (GMP) sandbox protection mechanism, which serves as a critical security boundary designed to isolate media plugin processes from the main browser application. The GMP sandbox is intended to prevent malicious media plugins from accessing sensitive system resources or executing arbitrary code that could compromise the user's system. The flaw allows remote attackers to bypass this essential security control by exploiting access to the GMP process, effectively undermining the fundamental security model that Firefox employs to protect users from potentially malicious media content.
The technical implementation of this vulnerability stems from insufficient process isolation mechanisms within Firefox's media plugin architecture. When Firefox loads media plugins such as the OpenH264 plugin, it creates separate processes to handle media decoding and encoding operations. The sandbox protection is supposed to restrict these processes from accessing system resources, network connections, or other browser processes. However, the vulnerability allows attackers to gain unauthorized access to the GMP process, which then enables them to execute code outside the intended sandbox boundaries. This typically occurs through improper privilege handling or inadequate inter-process communication controls that permit malicious code execution within the plugin process.
The operational impact of this vulnerability is severe and far-reaching, as it provides attackers with a pathway to bypass one of Firefox's most critical security defenses. Attackers can leverage this vulnerability to execute arbitrary code on the victim's system with the privileges of the GMP process, potentially leading to full system compromise. The attack vector is particularly dangerous because it can be initiated remotely through malicious web content, making it accessible to attackers without requiring physical access to the target system. This vulnerability particularly affects users who have media plugins installed, such as the OpenH264 plugin, which is commonly used for video conferencing and streaming applications. The compromise of the GMP sandbox undermines the entire security model of the browser, as it allows attackers to escape the controlled environment that should protect users from potentially malicious media content.
Organizations and users should implement immediate mitigations to address this vulnerability, including updating Firefox to version 35.0 or later where the sandbox protection has been strengthened. The fix addresses the underlying process isolation issues by implementing more robust privilege separation between the main browser process and the GMP processes. Security practitioners should also consider implementing network-level protections such as content filtering and web application firewalls to prevent access to malicious content that could exploit this vulnerability. Additionally, users should be educated about the risks of visiting untrusted websites and downloading media plugins from unofficial sources. This vulnerability aligns with CWE-276, which describes inadequate privilege management, and maps to ATT&CK technique T1059, which covers command and script injection, as the sandbox bypass enables attackers to execute malicious code within the browser environment. The remediation approach should include regular security updates, process monitoring, and implementation of defense-in-depth strategies that reduce the attack surface and limit the potential impact of similar vulnerabilities in the future.