Executive brief
GPAC is a multimedia framework used for video streaming and transcoding. A flaw in the RTP depacketizer component allows remote attackers to read data beyond buffer boundaries through a crafted RTP packet, potentially exposing sensitive data or causing a crash.
Technical details
An out-of-bounds read vulnerability exists in the gf_rtp_parse_ttxt() function of the RTP depacketizer component (src/ietf/rtp_depacketizer.c). The vulnerability arises from insufficient validation of the advertised payload size against the actual buffer size, allowing an attacker to read beyond allocated memory. The attack is network-based and does not require authentication or user interaction—a malicious RTP packet triggers the vulnerability. An attacker can read arbitrary memory, potentially leaking sensitive data or causing information disclosure. The fix validates the advertised size against the actual buffer before processing, implemented in patch 6bb0f64b4d1039c0fecd14ee2c1ee861d8661a68 and available in version abi-16.26.
Affected products
- GPAC GPAC 26.08-DEV
Timeline
- 2026-09-18: disclosed
- 2026-09-18: patched: Patch 6bb0f64b4d1039c0fecd14ee2c1ee861d8661a68 available in version abi-16.26