CVE-2026-54632: CWE-20: Improper Input Validation in sipsorcery-org sipsorcery
CVE-2026-54632 is an improper input validation vulnerability in sipsorcery versions prior to 10.0.9. It affects RTP and STUN packet parsing functions, allowing a remote attacker to send short or malformed packets to terminate active RTP or WebRTC media sessions. Exploitation requires knowledge of the ephemeral RTP/ICE port but no authentication or user interaction. The impact is limited to availability, causing denial of service. This issue is fixed in version 10.0.9.
AI Analysis
Technical Summary
SIPSorcery, a WebRTC, SIP, and VoIP library for C# and .NET, contains an improper input validation vulnerability (CWE-20) in RTPChannel.OnRTPPacketReceived and STUN attribute parsing functions (STUNAttribute.ParseMessageAttributes, STUNXORAddressAttribute, STUNAddressAttribute). These functions index untrusted bytes without sufficient length checks. When malformed short RTP packets or zero-to-seven-byte STUN address attributes are sent to the shared RTP/ICE socket, including during ICE connectivity checks before DTLS or STUN MESSAGE-INTEGRITY verification, a non-socket exception is raised causing UdpReceiver.EndReceiveFrom to close the channel. This allows a remote attacker who can reach or learn the ephemeral RTP/ICE port to terminate active RTP or WebRTC media sessions, resulting in denial of service. The vulnerability is fixed in version 10.0.9.
Potential Impact
An unauthenticated remote attacker who can send packets to the ephemeral RTP/ICE port can cause denial of service by terminating active RTP or WebRTC media sessions. There is no confidentiality or integrity impact. The impact is limited to availability disruption.
Mitigation Recommendations
Upgrade sipsorcery to version 10.0.9 or later, where this vulnerability is fixed. No other mitigation is indicated by the vendor advisory.
CVE-2026-54632: CWE-20: Improper Input Validation in sipsorcery-org sipsorcery
Description
CVE-2026-54632 is an improper input validation vulnerability in sipsorcery versions prior to 10.0.9. It affects RTP and STUN packet parsing functions, allowing a remote attacker to send short or malformed packets to terminate active RTP or WebRTC media sessions. Exploitation requires knowledge of the ephemeral RTP/ICE port but no authentication or user interaction. The impact is limited to availability, causing denial of service. This issue is fixed in version 10.0.9.
CVSS v3.1
Score 7.5high
Affected software
sipsorcery-org
sipsorcery
pkg:github/sipsorcery-org/sipsorceryRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
SIPSorcery, a WebRTC, SIP, and VoIP library for C# and .NET, contains an improper input validation vulnerability (CWE-20) in RTPChannel.OnRTPPacketReceived and STUN attribute parsing functions (STUNAttribute.ParseMessageAttributes, STUNXORAddressAttribute, STUNAddressAttribute). These functions index untrusted bytes without sufficient length checks. When malformed short RTP packets or zero-to-seven-byte STUN address attributes are sent to the shared RTP/ICE socket, including during ICE connectivity checks before DTLS or STUN MESSAGE-INTEGRITY verification, a non-socket exception is raised causing UdpReceiver.EndReceiveFrom to close the channel. This allows a remote attacker who can reach or learn the ephemeral RTP/ICE port to terminate active RTP or WebRTC media sessions, resulting in denial of service. The vulnerability is fixed in version 10.0.9.
Potential Impact
An unauthenticated remote attacker who can send packets to the ephemeral RTP/ICE port can cause denial of service by terminating active RTP or WebRTC media sessions. There is no confidentiality or integrity impact. The impact is limited to availability disruption.
Mitigation Recommendations
Upgrade sipsorcery to version 10.0.9 or later, where this vulnerability is fixed. No other mitigation is indicated by the vendor advisory.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-06-15T20:07:02.185Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6aa8567355bf5e2cf58d7f07
Added to database: 09/14/2026, 20:17:55 UTC
Last enriched: 09/14/2026, 20:31:41 UTC
Last updated: 09/14/2026, 21:04:46 UTC
Views: 5
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.