CVE-2025-49140: Pion Interceptor's improper RTP padding handling allows remote crash for SFU users (DoS)
Description
Pion Interceptor is a framework for building RTP/RTCP communication software. Versions v0.1.36 through v0.1.38 contain a bug in a RTP packet factory that can be exploited to trigger a panic with Pion based SFU via crafted RTP packets, This only affect users that use pion/interceptor. Users should upgrade to v0.1.39 or later, which validates that: `padLen > 0 && padLen <= payloadLength` and return error on overflow, avoiding panic. If upgrading is not possible, apply the patch from the pull request manually or drop packets whose P-bit is set but whose padLen is zero or larger than the remaining payload.
Classification
CVE ID: CVE-2025-49140
CVSS Base Severity: HIGH
CVSS Base Score: 7.5
CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected Products
Vendor: pion
Product: interceptor
Exploit Prediction Scoring System (EPSS)
EPSS Score: 0.04% (probability of being exploited)
EPSS Percentile: 12.21% (scored less or equal to compared to others)
EPSS Date: 2025-06-13 (when was this score calculated)
References
https://nvd.nist.gov/vuln/detail/CVE-2025-49140https://github.com/pion/interceptor/security/advisories/GHSA-f26w-gh5m-qq77
https://github.com/pion/webrtc/issues/3148
https://github.com/pion/interceptor/pull/338
https://github.com/pion/interceptor/commit/fa5b35ea867389cec33a9c82fffbd459ca8958e5