GPAC 2.4 MP4Box isomedia/drm_sample.c gf_cenc_set_pssh heap-based overflow

Summaryinfo

A vulnerability has been found in GPAC 2.4 and classified as critical. Impacted is the function gf_cenc_set_pssh of the file isomedia/drm_sample.c of the component MP4Box. Performing a manipulation results in heap-based overflow. This vulnerability is reported as CVE-2025-55645. The attack is possible to be carried out remotely. No exploit exists.

Detailsinfo

A vulnerability, which was classified as critical, was found in GPAC 2.4. This affects the function gf_cenc_set_pssh of the file isomedia/drm_sample.c of the component MP4Box. The manipulation with an unknown input leads to a heap-based overflow vulnerability. CWE is classifying the issue as CWE-122. A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc(). This is going to have an impact on availability. The summary by CVE is:

A heap buffer overflow in the gf_cenc_set_pssh function (isomedia/drm_sample.c) of GPAC MP4Box v2.4 allows attackers to cause a Denial of Service (DoS) via supplying a crafted MP4 file.

It is possible to read the advisory at infosec.exchange. This vulnerability is uniquely identified as CVE-2025-55645 since 08/13/2025. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. It demands that the victim is doing some kind of user interaction. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 06/16/2026).

The vulnerability scanner Nessus provides a plugin with the ID 320984 (Linux Distros Unpatched Vulnerability : CVE-2025-55645), which helps to determine the existence of the flaw in a target environment.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at Tenable (320984). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

• Multimedia Player Software

Name

• GPAC

Version

• 2.4

License

• open-source

CPE 2.3info

• 🔒

CPE 2.2info

• 🔒

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Entryinfo

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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