CVE-2021-36060 in Media Encoder
Summary
by MITRE • 09/06/2023
Adobe Media Encoder version 15.2 (and earlier) is affected by an out-of-bounds read vulnerability that could lead to disclosure of sensitive memory. An attacker could leverage this vulnerability to bypass mitigations such as ASLR. Exploitation of this issue requires user interaction in that a victim must open a malicious file.
VulDB is the best source for vulnerability data and more expert information about this specific topic.
Analysis
by VulDB Data Team • 09/06/2023
Adobe Media Encoder version 15.2 and earlier contains a critical out-of-bounds read vulnerability that represents a significant security risk within the media processing ecosystem. This vulnerability falls under the CWE-129 weakness category, which specifically addresses improper validation of array indices or object access boundaries. The flaw manifests when the application processes specially crafted media files that trigger memory access violations beyond the allocated buffer boundaries. The out-of-bounds read condition occurs during the parsing of media metadata or file structures where the software fails to properly validate input parameters before accessing memory locations. This vulnerability is particularly concerning because it can be leveraged to bypass important security mitigations such as Address Space Layout Randomization, which is designed to prevent attackers from predicting memory addresses during exploitation attempts.
The operational impact of this vulnerability extends beyond simple memory disclosure, as it creates opportunities for more sophisticated attack vectors that could ultimately lead to full system compromise. When an attacker successfully exploits this issue, they can potentially read sensitive memory contents that may contain cryptographic keys, authentication tokens, or other confidential data structures. The vulnerability requires user interaction to be exploited, meaning victims must open a maliciously crafted media file, which makes it particularly dangerous in environments where users frequently handle media files from untrusted sources. This user interaction requirement does not diminish the severity of the threat, as it can be achieved through social engineering tactics, phishing campaigns, or supply chain compromises where attackers insert malicious files into legitimate media workflows.
The exploitation of this vulnerability aligns with several techniques documented in the MITRE ATT&CK framework, particularly those related to initial access and privilege escalation through software exploitation. Attackers can leverage this issue as part of a broader attack chain where the memory disclosure serves as a stepping stone for more advanced exploitation techniques. The vulnerability's impact on ASLR bypass capabilities makes it especially valuable to threat actors seeking to maintain persistent access to compromised systems. Security researchers have noted that such out-of-bounds read vulnerabilities often serve as entry points for more complex attacks, as they can reveal memory layout information that enables attackers to craft more effective exploits against other system components.
Organizations should implement immediate mitigations to protect against exploitation of this vulnerability through timely patching of Adobe Media Encoder installations to version 15.3 or later, which contains the necessary fixes for the out-of-bounds read condition. Additional defensive measures include implementing strict file validation policies for media files, particularly in high-risk environments where users handle files from external sources. Network-based protections such as sandboxing media file processing and implementing content filtering mechanisms can help reduce the attack surface. Security teams should also monitor for indicators of compromise related to this vulnerability, including unusual memory access patterns or attempts to read system memory structures that may suggest exploitation attempts. The vulnerability demonstrates the importance of maintaining up-to-date media processing software and highlights the critical need for comprehensive vulnerability management programs that address both known and emerging threats in multimedia applications.