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… (CVE-2026-90778)
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.
AI Analysis
Technical Summary
SIPp through version 3.7.7 contains a buffer overflow vulnerability (CWE-120) in the get_peer_tag() function. The flaw occurs when processing SIP To headers that include tag parameters of 2049 bytes or more, which overflow a static buffer. This can be triggered by unauthenticated remote attackers sending crafted SIP messages, resulting in a denial of service via process crash. The CVSS 3.1 base score is 7.5, indicating high severity, with attack vector network, low attack complexity, no privileges required, no user interaction, and impact limited to availability.
Potential Impact
The vulnerability allows unauthenticated remote attackers to cause a denial of service by crashing the SIPp process through buffer overflow. There is no indication of confidentiality or integrity impact. No known exploits are reported in the wild.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, consider limiting exposure of SIPp services to untrusted networks to reduce risk.
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… (CVE-2026-90778)
Description
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.
CVSS v3.1
Score 7.5high
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
SIPp through version 3.7.7 contains a buffer overflow vulnerability (CWE-120) in the get_peer_tag() function. The flaw occurs when processing SIP To headers that include tag parameters of 2049 bytes or more, which overflow a static buffer. This can be triggered by unauthenticated remote attackers sending crafted SIP messages, resulting in a denial of service via process crash. The CVSS 3.1 base score is 7.5, indicating high severity, with attack vector network, low attack complexity, no privileges required, no user interaction, and impact limited to availability.
Potential Impact
The vulnerability allows unauthenticated remote attackers to cause a denial of service by crashing the SIPp process through buffer overflow. There is no indication of confidentiality or integrity impact. No known exploits are reported in the wild.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, consider limiting exposure of SIPp services to untrusted networks to reduce risk.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-w99r-9mmj-g2pr
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-90778"]
- Database Specific Severity
- HIGH
- Cvss Version
- 3.1
Threat ID: 6aa741a155bf5e2cf5489bcc
Added to database: 09/14/2026, 00:36:49 UTC
Last enriched: 09/14/2026, 00:41:17 UTC
Last updated: 09/14/2026, 02:21:33 UTC
Views: 3
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