CVE-2026-90778

Summary

SIPp through 3.7.7 contains a buffer overflow vulnerability in get_peer_tag() function when processing SIP To headers with tag parameters of 2049 bytes or more. Unauthenticated remote attackers can send crafted SIP messages with oversized tag parameters to overflow the static buffer and crash the process.

Affected Software

Weaknesses

• CWE-120: Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

References

• https://github.com/SIPp/sipp/pull/879
• https://github.com/SIPp/sipp/commit/ddf22d1a54e0396b2e18ebaf4cf5a3fa860e5da4
• https://github.com/SIPp/sipp/blob/v3.7.7/src/sip_parser.cpp#L76-L113
• https://github.com/SIPp/sipp
• https://www.vulncheck.com/advisories/sipp-through-3.7.7-buffer-overflow-via-sip-to-header-tag

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