Overview
The vulnerability, CVE-2023-46929, is a significant security issue that affects users of the GPAC 2.3-DEV-rev605-gfc9e29089-master. Specifically, a flaw in MP4Box in gf_avc_change_vui has been identified, which attackers can exploit to crash the application. The severity of this vulnerability underscores the importance of prompt patching and mitigation to prevent potential system compromise or data leakage.
Vulnerability Summary
CVE ID: CVE-2023-46929
Severity: High (CVSS: 7.5)
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: System crash, potential system compromise, and data leakage
Affected Products
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Product | Affected Versions
GPAC | 2.3-DEV-rev605-gfc9e29089-master
How the Exploit Works
The vulnerability is in the gf_avc_change_vui function in the file /afltest/gpac/src/media_tools/av_parsers.c. An attacker can exploit this flaw by sending a specially crafted payload to the application. This payload triggers an error in the MP4Box, causing the application to crash, potentially granting unauthorized system access or leading to data leakage.
Conceptual Example Code
Below is a conceptual example of a malicious payload that might be used to exploit this vulnerability. Note that the specific payload would depend on the attacker’s knowledge of the system and their intent.
POST /gf_avc_change_vui HTTP/1.1
Host: target.example.com
Content-Type: application/mp4
{ "malicious_payload": "specially_crafted_data" }Mitigation Guidance
Users are advised to apply the vendor patch as soon as it is available. In the meantime, use of a Web Application Firewall or Intrusion Detection System may offer temporary mitigation. Regular system monitoring and network traffic analysis can also help detect any unusual activity.
