CVE-2019-11735 in Firefox
Summary
by MITRE
Mozilla developers and community members reported memory safety bugs present in Firefox 68 and Firefox ESR 68. Some of these bugs showed evidence of memory corruption and we presume that with enough effort that some of these could be exploited to run arbitrary code. This vulnerability affects Firefox < 69 and Firefox ESR < 68.1.
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Analysis
by VulDB Data Team • 09/11/2020
Mozilla Firefox version 68 and Firefox ESR 68 contained multiple memory safety vulnerabilities that could potentially lead to arbitrary code execution. These vulnerabilities were identified through comprehensive security testing and community reporting, with developers noting evidence of memory corruption within the browser's codebase. The affected versions include Firefox 68 and Firefox ESR 68, with the vulnerability being resolved in Firefox 69 and Firefox ESR 68.1 releases. Memory safety issues of this nature typically arise from improper handling of memory allocation and deallocation processes, creating potential attack vectors for malicious actors. The presence of memory corruption suggests that attackers could manipulate memory structures to execute malicious code, representing a critical security risk for users of the affected browser versions. These vulnerabilities fall under the broader category of memory safety issues that are commonly classified as CWE-122 (Heap-based Buffer Overflow) or similar memory corruption weaknesses. The attack surface for such vulnerabilities extends to any user interaction with the browser, particularly when visiting malicious websites or opening compromised web content. According to ATT&CK framework, these vulnerabilities would map to techniques involving memory corruption and privilege escalation. The security implications are significant as they could enable remote code execution without user interaction, making them particularly dangerous in targeted attack scenarios. Organizations and individuals using affected Firefox versions should immediately upgrade to the patched releases to mitigate potential exploitation risks. The vulnerability demonstrates the importance of regular security updates and the critical nature of memory safety in browser implementations. These types of bugs often require extensive debugging and code review to identify and fix properly, highlighting the complexity of modern browser security architectures. The affected versions represent a substantial user base that required immediate attention and patching to prevent potential exploitation by threat actors. Security researchers continue to monitor these types of vulnerabilities as they represent fundamental weaknesses in software memory management that can have widespread impact across different platforms and operating systems. The remediation process for such vulnerabilities typically involves careful code review, memory management improvements, and comprehensive testing to ensure that similar issues do not reoccur in future releases.