CVE-2018-12388 in Firefox
Summary
by MITRE
Mozilla developers and community members reported memory safety bugs present in Firefox 62. 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 < 63.
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Analysis
by VulDB Data Team • 06/03/2023
The vulnerability identified as CVE-2018-12388 represents a critical memory safety issue discovered within Mozilla Firefox version 62 and earlier releases. This flaw manifests as multiple memory corruption vulnerabilities that were reported by both Mozilla developers and the broader security community. The nature of these bugs indicates potential for serious exploitation scenarios where an attacker could leverage the memory corruption to execute arbitrary code on a target system. The vulnerability specifically affects Firefox versions prior to 63, making it a significant concern for users who had not yet updated their browsers to the patched version. These memory safety issues are particularly dangerous because they can potentially allow remote code execution when exploited, making them attractive targets for cyber attackers seeking to compromise user systems through web-based attacks.
The technical implementation of these memory safety bugs demonstrates fundamental flaws in Firefox's memory management and handling of various data structures. Memory corruption vulnerabilities typically occur when programs write data beyond the boundaries of allocated memory regions or when they improperly manage memory allocation and deallocation processes. In the context of web browsers, these issues often arise during parsing of complex web content such as JavaScript, HTML, or multimedia elements. The presence of evidence suggesting these bugs could lead to memory corruption indicates that attackers might be able to manipulate heap memory structures, potentially leading to control flow hijacking through techniques such as return-oriented programming or other exploit mitigation bypass methods. These vulnerabilities align with CWE-122 (Heap-based Buffer Overflow) and CWE-787 (Out-of-bounds Write) classifications, which are commonly associated with browser security flaws that can be leveraged for remote code execution.
The operational impact of CVE-2018-12388 extends beyond simple browser instability, as it creates potential attack vectors for sophisticated adversaries who could exploit these memory corruption flaws to gain unauthorized access to affected systems. Attackers could potentially craft malicious web pages or deliver malware through compromised websites that would trigger these vulnerabilities when users browse to them. The risk is particularly elevated because browsers are frequently targeted by threat actors due to their privileged position in user environments and their ability to access sensitive data. These vulnerabilities could enable attackers to bypass modern exploit mitigations such as address space layout randomization and data execution prevention mechanisms, making them particularly dangerous in enterprise environments where users may be running outdated browser versions. The vulnerability's potential for remote code execution places it within the ATT&CK framework's technique T1059 (Command and Scripting Interpreter) and T1203 (Exploitation for Client Execution) categories, highlighting its significance in adversarial attack chains.
Organizations and individual users should immediately update to Firefox version 63 or later to mitigate the risks associated with CVE-2018-12388. The patch released with Firefox 63 includes memory safety improvements and fixes that address the underlying buffer overflow and memory corruption issues present in earlier versions. System administrators should prioritize this update as part of their regular security maintenance procedures, particularly in environments where users may be accessing untrusted web content. Additional mitigations can include implementing browser security policies that restrict access to potentially malicious websites, enabling sandboxing features, and monitoring for suspicious browser behavior that might indicate exploitation attempts. The vulnerability serves as a reminder of the importance of maintaining up-to-date software and the critical role that regular security updates play in protecting against known exploits that could be leveraged by cybercriminals for unauthorized system access and data exfiltration.