CVE-2026-90558: Stack-based Buffer Overflow in irontec sngrep
sngrep through 1.8.4 contains stack buffer overflow vulnerabilities in SIP attribute formatting routines when header values exceed the 255-byte buffer limit. Attackers can craft malicious SIP packets with oversized Call-ID, X-Call-ID, or other header fields to overflow stack buffers and cause crashes or execute arbitrary code during packet parsing and rendering.
AI Analysis
Technical Summary
sngrep through version 1.8.4 contains stack buffer overflow vulnerabilities in SIP attribute formatting routines. When SIP header values exceed the fixed 255-byte buffer, attackers can exploit this by sending malicious SIP packets with oversized Call-ID, X-Call-ID, or other header fields. This overflow can lead to crashes or arbitrary code execution during the parsing and rendering of SIP packets.
Potential Impact
Successful exploitation can cause denial of service through application crashes or potentially allow remote code execution without any privileges or user interaction. The vulnerability affects the core SIP packet processing functionality, making it critical for environments using sngrep for SIP traffic analysis.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, avoid processing untrusted SIP packets or deploy network-level protections to filter oversized SIP headers.
CVE-2026-90558: Stack-based Buffer Overflow in irontec sngrep
Description
sngrep through 1.8.4 contains stack buffer overflow vulnerabilities in SIP attribute formatting routines when header values exceed the 255-byte buffer limit. Attackers can craft malicious SIP packets with oversized Call-ID, X-Call-ID, or other header fields to overflow stack buffers and cause crashes or execute arbitrary code during packet parsing and rendering.
CVSS v4.0
Score 9.3critical
Affected software
irontec
sngrep
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
sngrep through version 1.8.4 contains stack buffer overflow vulnerabilities in SIP attribute formatting routines. When SIP header values exceed the fixed 255-byte buffer, attackers can exploit this by sending malicious SIP packets with oversized Call-ID, X-Call-ID, or other header fields. This overflow can lead to crashes or arbitrary code execution during the parsing and rendering of SIP packets.
Potential Impact
Successful exploitation can cause denial of service through application crashes or potentially allow remote code execution without any privileges or user interaction. The vulnerability affects the core SIP packet processing functionality, making it critical for environments using sngrep for SIP traffic analysis.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, avoid processing untrusted SIP packets or deploy network-level protections to filter oversized SIP headers.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-09-12T11:13:43.326Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6aa5974855bf5e2cf597728a
Added to database: 09/12/2026, 18:17:44 UTC
Last enriched: 09/12/2026, 18:31:34 UTC
Last updated: 09/13/2026, 01:31:50 UTC
Views: 28
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