CVE-2018-5188 in Firefox
Summary
by MITRE
Memory safety bugs present in Firefox 60, Firefox ESR 60, and Firefox ESR 52.8. 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 Thunderbird < 60, Thunderbird < 52.9, Firefox ESR < 60.1, Firefox ESR < 52.9, and Firefox < 61.
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Analysis
by VulDB Data Team • 04/05/2020
The vulnerability identified as CVE-2018-5188 represents a critical memory safety issue affecting Mozilla Firefox and Thunderbird products across multiple versions. This vulnerability stems from memory safety bugs that were present in Firefox 60, Firefox ESR 60, and Firefox ESR 52.8, with the potential for exploitation leading to arbitrary code execution. The presence of memory corruption evidence indicates that these flaws could be leveraged by attackers to gain unauthorized control over affected systems. The vulnerability impacts a broad range of products including Thunderbird versions prior to 60, Thunderbird versions prior to 52.9, Firefox ESR versions prior to 60.1, Firefox ESR versions prior to 52.9, and Firefox versions prior to 61. These memory safety issues fall under the category of memory corruption vulnerabilities that are particularly dangerous due to their potential for privilege escalation and system compromise.
The technical nature of these memory safety bugs aligns with common CWE classifications such as CWE-121, which deals with stack-based buffer overflow conditions, and CWE-122, which addresses heap-based buffer overflow conditions. These vulnerabilities typically arise from improper memory management where applications fail to properly validate buffer boundaries or handle memory allocation and deallocation processes. The memory corruption characteristics suggest that attackers could manipulate memory addresses or overwrite critical program data structures to redirect execution flow. The underlying flaw likely involves improper handling of memory operations during JavaScript execution or web content processing, where insufficient bounds checking allows for unauthorized memory access patterns.
From an operational perspective, this vulnerability presents significant risk to organizations using affected software versions as it could enable remote code execution attacks without user interaction in many scenarios. The potential for arbitrary code execution means that attackers could install malware, establish backdoors, or perform other malicious activities on compromised systems. The vulnerability's exploitation potential is heightened by the fact that it affects widely used email and web browser applications, making it attractive to threat actors targeting enterprise networks or individual users. The memory corruption aspects of these bugs also suggest that they could be chained with other exploits or used in advanced persistent threat campaigns where maintaining persistence is crucial for long-term access.
The mitigation strategies for CVE-2018-5188 primarily focus on immediate software updates and patches provided by Mozilla to address the identified memory safety issues. Organizations should prioritize upgrading to patched versions of Firefox, Thunderbird, and Firefox ESR releases to eliminate exposure to these vulnerabilities. Security teams should implement network monitoring to detect potential exploitation attempts and consider deploying intrusion detection systems that can identify suspicious memory access patterns. Additional defensive measures include implementing application whitelisting policies, using sandboxing techniques, and ensuring that users operate with minimal privileges to limit potential damage from successful exploitation attempts. The vulnerability's classification under ATT&CK framework would likely map to techniques involving privilege escalation and execution through memory corruption, making comprehensive security monitoring essential for early detection and response.