CVE-2025-70307 identifies a stack overflow vulnerability within the dump_ttxt_sample function of GPAC version 2.4.0. GPAC is an open-source multimedia framework widely used for packaging, streaming, and processing media content, including MP4 files and timed text tracks. The vulnerability arises due to improper handling of input data in the dump_ttxt_sample function, which processes timed text samples. An attacker can craft a malicious packet designed to overflow the stack buffer, leading to a Denial of Service (DoS) by crashing the application or causing undefined behavior. The flaw does not require authentication, meaning an attacker can exploit it remotely if the vulnerable component is exposed. No CVSS score has been assigned yet, and no patches or known exploits are currently available. The vulnerability primarily threatens availability by causing service interruptions in media processing workflows that rely on GPAC. Since GPAC is used in media streaming and packaging, organizations that handle multimedia content, such as broadcasters, content delivery networks, and media production companies, are at risk. The absence of patches necessitates proactive monitoring and network-level protections to mitigate potential exploitation.

The primary impact of CVE-2025-70307 is a Denial of Service condition, which can disrupt media processing and streaming services relying on GPAC. For European organizations, this could translate into downtime for media delivery platforms, affecting broadcasters, streaming services, and content providers. Such disruptions can lead to loss of revenue, damage to reputation, and operational delays. Since GPAC is often integrated into media workflows, the vulnerability could affect both internal processing systems and customer-facing services. The lack of authentication requirements and the potential for remote exploitation increase the risk of widespread impact if vulnerable systems are exposed to untrusted networks. While no data confidentiality or integrity compromise is indicated, the availability impact alone can be significant for time-sensitive media operations. Organizations in Europe with heavy reliance on multimedia frameworks are particularly vulnerable to service interruptions caused by this flaw.

1. Immediately inventory all systems and applications using GPAC version 2.4.0 to identify potential exposure. 2. Restrict network access to services utilizing GPAC, especially from untrusted or public networks, using firewalls and network segmentation. 3. Monitor official GPAC channels and repositories for security patches or updates addressing this vulnerability and apply them promptly once available. 4. Implement intrusion detection or anomaly detection systems to identify unusual packet patterns targeting media processing services. 5. Consider deploying application-level sandboxing or containerization for media processing components to limit the impact of potential crashes. 6. If feasible, temporarily disable or replace the dump_ttxt_sample functionality or related features until a patch is released. 7. Conduct regular backups and ensure recovery procedures are tested to minimize downtime in case of exploitation. 8. Educate security and operations teams about this vulnerability to enhance monitoring and incident response readiness.