CVE-2020-15674 in Firefox
Summary
by MITRE
Mozilla developers reported memory safety bugs present in Firefox 80. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox < 81.
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Analysis
by VulDB Data Team • 11/15/2020
The vulnerability identified as CVE-2020-15674 represents a critical memory safety issue within the Firefox web browser ecosystem that was discovered and reported by Mozilla developers. This particular vulnerability resides in Firefox version 80 and affects all earlier versions up to and including 80, with the patch being implemented in Firefox 81. The nature of these memory safety bugs indicates a fundamental weakness in how the browser handles memory allocation and deallocation processes, creating potential entry points for malicious actors seeking to compromise system integrity.
These memory safety bugs manifest as evidence of memory corruption within the browser's execution environment, which according to security analysis suggests that the vulnerabilities could potentially be exploited to execute arbitrary code on affected systems. The presence of memory corruption vulnerabilities in web browsers is particularly concerning because they can lead to complete system compromise when successfully exploited. The technical flaw essentially allows attackers to manipulate memory structures in ways that were not intended by the software design, potentially enabling them to overwrite critical program data or execute malicious instructions within the browser's memory space.
The operational impact of CVE-2020-15674 extends beyond simple browser functionality degradation, as it represents a potential gateway for more sophisticated attacks including remote code execution. When a browser is compromised through memory corruption vulnerabilities, attackers can leverage these flaws to gain unauthorized access to user systems, potentially leading to data theft, system control, or further network infiltration. The vulnerability affects not just individual users but also enterprise environments where Firefox is widely deployed, making it a significant concern for organizations that rely on web-based applications and services.
From a cybersecurity perspective, these memory safety bugs align with common attack patterns documented in the ATT&CK framework under the T1059 technique for command and control, where attackers can use such vulnerabilities to establish persistent access. The CWE (Common Weakness Enumeration) classification for memory safety issues typically falls under categories such as CWE-125 (Out-of-bounds Read) or CWE-787 (Out-of-bounds Write), which directly relate to the memory corruption aspects of this vulnerability. The fact that these bugs were present in Firefox 80 and required a version update to address them demonstrates the importance of timely patch management in maintaining security posture. Organizations should prioritize immediate deployment of Firefox 81 or later versions to mitigate the risk of exploitation, as the potential for arbitrary code execution represents a severe threat to both individual privacy and organizational security infrastructure.
The remediation approach for this vulnerability primarily involves updating to Firefox version 81 or later, which incorporates the necessary memory safety fixes implemented by Mozilla developers. Security teams should also consider implementing additional monitoring measures to detect potential exploitation attempts, particularly in environments where Firefox is extensively used. The vulnerability serves as a reminder of the critical importance of regular software updates and the need for comprehensive vulnerability management programs that can quickly respond to emerging threats in the browser security landscape.