Overview
The vulnerability identified as CVE-2025-47219 has emerged as a serious cybersecurity concern for users and administrators dealing with GStreamer multimedia framework, specifically version 1.26.1 and probably earlier versions. This vulnerability, related to the isomp4 plugin’s qtdemux_parse_trak function, can potentially lead to unauthorized access, system compromise, and data leakage. Given the widespread use of GStreamer in multimedia applications, it is imperative to understand, assess, and mitigate the risks associated with this vulnerability.
Vulnerability Summary
CVE ID: CVE-2025-47219
Severity: High (8.1 CVSS Score)
Attack Vector: Remote
Privileges Required: None
User Interaction: Not required
Impact: Potential system compromise and data leakage
Affected Products
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Product | Affected Versions
GStreamer | Up to 1.26.1
How the Exploit Works
The vulnerability lies in the qtdemux_parse_trak function of GStreamer’s isomp4 plugin. While parsing an MP4 file, the function reads past the end of a heap buffer. This action, known as a heap buffer overflow, can cause the application to crash or, more dangerously, allow an attacker to execute arbitrary code. The attacker could craft a malicious MP4 file that, when processed by the vulnerable GStreamer software, triggers the overflow and executes the attacker’s code, potentially leading to system compromise or data leakage.
Conceptual Example Code
Below is a conceptual example of how an attacker might exploit this vulnerability. The attacker crafts a malicious MP4 file and sends it to the target system. The GStreamer software, upon processing the MP4 file, triggers the heap buffer overflow and executes the attacker’s arbitrary code.
# Attacker's machine
$ echo 'malicious_code' > payload.bin
$ mp4creator -create=payload.bin malicious.mp4
# Transfer the malicious.mp4 file to the target system, which is running a vulnerable version of GStreamer
$ scp malicious.mp4 user@target:/tmp/
# On the target system, the GStreamer processes the malicious MP4 file
$ gst-launch-1.0 filesrc location=/tmp/malicious.mp4 ! qtdemux ! fakesinkIn this example, `malicious_code` represents the attacker’s arbitrary code that will be executed on the target system.