CVE-2022-40016 in media-server
Summary
by MITRE • 02/16/2023
Use After Free (UAF) vulnerability in ireader media-server before commit 3e0f63f1d3553f75c7d4eb32fa7c7a1976a9ff84 in librtmp, allows attackers to cause a denial of service.
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Analysis
by VulDB Data Team • 07/24/2026
The CVE-2022-40016 vulnerability represents a critical use-after-free condition within the ireader media-server software, specifically affecting the librtmp library component. This vulnerability arises from improper memory management practices where the software attempts to access memory that has already been freed, creating a potential vector for exploitation. The issue is particularly concerning as it exists in versions of the media-server prior to commit 3e0f63f1d3553f75c7d4eb32fa7c7a1976a9ff84, indicating that developers were aware of the memory handling flaw and subsequently addressed it in their codebase.
The technical flaw manifests within the librtmp library which is responsible for handling real-time messaging protocol operations commonly used in streaming media applications. When processing certain network packets or media streams, the library fails to properly manage object lifecycles, leading to scenarios where memory addresses are accessed after being deallocated. This memory corruption vulnerability can be triggered through malformed input data sent to the media-server, potentially causing the application to crash or behave unpredictably. The vulnerability is classified as a use-after-free condition under CWE-416, which specifically addresses the reuse of memory after it has been freed, a pattern that frequently leads to system instability and potential exploitation.
From an operational perspective, this vulnerability presents significant risks for organizations relying on the ireader media-server for content delivery or streaming services. The denial of service impact means that attackers can disrupt legitimate service availability by causing the media-server to crash or become unresponsive, effectively preventing authorized users from accessing streaming content. The vulnerability is particularly dangerous in environments where continuous media streaming is critical for business operations, as it could lead to substantial revenue loss and service degradation. Additionally, the nature of use-after-free vulnerabilities often makes them attractive targets for advanced persistent threat actors who may attempt to escalate the issue into more severe exploits through memory corruption techniques.
The mitigation strategy for CVE-2022-40016 centers on updating the ireader media-server software to a version that includes the fix implemented after commit 3e0f63f1d3553f75c7d4eb32fa7c7a1976a9ff84. Organizations should also implement network monitoring to detect unusual traffic patterns that might indicate exploitation attempts, as well as maintain robust patch management processes to ensure timely deployment of security updates. Security teams should consider implementing application-level firewalls or intrusion prevention systems that can identify and block malformed media stream data that could trigger the vulnerability. From an ATT&CK framework perspective, this vulnerability aligns with techniques involving denial of service and memory corruption, potentially enabling adversaries to move laterally within networks or establish persistent access through more sophisticated exploitation methods if not properly addressed.