CVE-2026-121943: fallo de gravedad media en irontec sngrep
Irontec sngrep through 1.9.0 Out-of-Bounds Stack Read via sip_check_packet
Publicada el
Aviso por correo cuando entre en el KEV, tenga PoC pública o suba de nota.
33Vexday Risk Score
Sin señal de explotación. Ella tiene prueba de concepto pública.
ssvc Attendcvss 6.3epss 5.6%
Irontec sngrep through 1.9.0 contains an out-of-bounds stack read vulnerability in sip_check_packet and sip_validate_packet caused by an off-by-one length check on 10240-byte SIP payloads. Remote attackers can send a crafted UDP or TCP SIP packet or supply a pcap file to crash sngrep or leak adjacent stack bytes into displayed SIP fields.
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N
Productos afectados
irontec · sngrepPoCs públicas encontradas — 1
cve_referencehackmd.io/@haindpwn/cve-2026-121943-121944-sngrep-sip-payload-missing-nul-oob-readno verificado⚠ Recursos públicos, para evaluar la exposición de sistemas que controlas o estás autorizado a probar. Prueba solo con autorización.
CVEs relacionadas — irontec sngrep
En el mismo producto, de las más peligrosas a las menos.
CVE-2024-3120CRITICALStack-Buffer Overflow in 'Content-Length' and 'Warning' Header Processing in sngrepEPSS 1.8%CVE-2024-3119CRITICALStack-Buffer Overflow in 'Call-ID' and 'X-Call-ID' SIP Header Processing in sngrepEPSS 1.8%CVE-2026-90558CRITICALsngrep through 1.8.4 Stack Buffer Overflow via SIP HeadersEPSS 0.9%CVE-2026-121944MEDIUMsngrep through 1.9.0 Infinite Loop DoS via Crafted NFLOG TLVEPSS 0.2%
Referencias
https://github.com/irontec/sngrep/blob/v1.9.0/src/sip.c#L396-L410https://github.com/irontec/sngrep/issues/589https://hackmd.io/@haindpwn/cve-2026-121943-121944-sngrep-sip-payload-missing-nul-oob-readhttps://hackmd.io/@haindpwn/sngrep-sip-payload-missing-nul-oob-readhttps://www.vulncheck.com/advisories/irontec-sngrep-through-1.9.0-out-of-bounds-stack-read-via-sip-check-packet