CVE-2024-49776 identifies a vulnerability in the tsMuxer software, specifically in the nightly build version dated 2024-04-05. The issue arises from a negative-size parameter being processed improperly, which is a classic example of CWE-131 (Incorrect Calculation of Buffer Size). This flaw allows an attacker to craft a Transport Stream (TS) video file with maliciously manipulated size parameters that cause the tsMuxer application to crash or become unresponsive, resulting in a denial of service (DoS) condition. The vulnerability requires no privileges (AV:N) and has low attack complexity (AC:L), but does require user interaction (UI:R) to open or process the crafted file. The scope is unchanged (S:U), and the impact is limited to availability (A:H), with no impact on confidentiality or integrity. The CVSS v3.1 base score is 6.5, reflecting medium severity. No patches or fixes have been published at the time of disclosure, and there are no known exploits in the wild. The vulnerability primarily affects users of tsMuxer, a tool commonly used for muxing video streams, particularly in media production and streaming workflows. Attackers could exploit this vulnerability by distributing malicious TS files to targets, causing service interruptions or application crashes when processed.

The primary impact of CVE-2024-49776 is denial of service, which can disrupt media processing pipelines, streaming services, or any application relying on tsMuxer to handle TS video files. For organizations involved in video content creation, broadcasting, or streaming, this could lead to downtime, degraded service quality, or operational delays. Although the vulnerability does not compromise data confidentiality or integrity, the availability impact can affect business continuity and user experience. Since exploitation requires user interaction, the risk is mitigated somewhat by controlled environments, but organizations that accept or process user-submitted TS files are at higher risk. The lack of known exploits reduces immediate threat, but the absence of patches means the vulnerability remains open to future exploitation. Attackers could leverage this flaw in targeted attacks against media companies or service providers to cause disruption.

To mitigate CVE-2024-49776, organizations should: 1) Avoid processing TS video files from untrusted or unauthenticated sources until a patch is available. 2) Implement strict input validation and scanning of TS files before processing with tsMuxer. 3) Monitor tsMuxer application logs and system stability for signs of crashes or abnormal behavior indicative of exploitation attempts. 4) Use sandboxing or containerization to isolate tsMuxer processes, limiting the impact of potential crashes. 5) Stay informed about updates from tsMuxer developers and apply patches promptly once released. 6) Consider alternative video muxing tools with no known vulnerabilities if immediate patching is not possible. 7) Educate users and operators about the risks of opening untrusted TS files to reduce inadvertent exploitation. These steps go beyond generic advice by focusing on operational controls and environment hardening specific to video processing workflows.