CVE-2018-4937 in Flash Player
Summary
by MITRE
Adobe Flash Player versions 29.0.0.113 and earlier have an exploitable out-of-bounds write vulnerability. Successful exploitation could lead to arbitrary code execution in the context of the current user.
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Analysis
by VulDB Data Team • 12/28/2024
Adobe Flash Player contained a critical out-of-bounds write vulnerability that affected versions 29.0.0.113 and earlier, representing a significant security risk for users and organizations. This vulnerability falls under the Common Weakness Enumeration category CWE-787, which specifically addresses out-of-bounds write conditions that can result in memory corruption and arbitrary code execution. The flaw occurred within the Flash Player's handling of multimedia content, particularly when processing certain data structures that exceeded allocated memory boundaries.
The technical implementation of this vulnerability allowed attackers to manipulate memory operations through crafted malicious content delivered via web browsers or other Flash-enabled applications. When the Flash Player attempted to write data beyond the bounds of allocated memory buffers, it could overwrite adjacent memory locations, potentially corrupting critical program structures or injecting malicious code. This type of memory corruption vulnerability is particularly dangerous because it can be exploited to gain complete control over the affected system, making it a prime target for advanced persistent threats and zero-day attacks.
The operational impact of CVE-2018-4937 extended beyond individual user systems to encompass enterprise environments where Flash Player remained widely deployed despite Adobe's end-of-life announcement. Organizations that had not migrated away from Flash-based applications, web content, or legacy systems were particularly vulnerable to exploitation attempts. The vulnerability's exploitability was enhanced by the widespread use of Flash Player across different platforms and browsers, creating numerous attack vectors for threat actors to target. This made the vulnerability particularly attractive for nation-state actors and cybercriminal organizations seeking to establish persistent access to target networks.
Security professionals recommended immediate patching and remediation actions, including disabling Flash Player in web browsers and implementing network-based controls to block Flash content. The vulnerability aligned with ATT&CK technique T1059.007, which covers scripting through web browsers, and T1203, which addresses exploitation of remote services. Organizations should have implemented multi-layered defense strategies including web application firewalls, content security policies, and user education programs to mitigate the risk of exploitation. The incident underscored the importance of maintaining up-to-date software inventory and implementing automated patch management processes to prevent similar vulnerabilities from being exploited in the future.