CVE-2026-121944: fallo de gravedad media en irontec sngrep
sngrep through 1.9.0 Infinite Loop DoS via Crafted NFLOG TLV
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 6.8epss 0.2%
sngrep through 1.9.0 contains an infinite loop vulnerability in capture_packet_reasm_ip() in src/capture.c that allows attackers to cause denial of service via crafted NFLOG TLVs. Attackers can supply a pcap file with link type NFLOG containing a non-payload TLV with length under 4, making the capture thread spin at full CPU and stop processing packets.
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/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-2026-121943MEDIUMIrontec sngrep through 1.9.0 Out-of-Bounds Stack Read via sip_check_packetEPSS 5.6%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%
Referencias
https://github.com/irontec/sngrep/blob/v1.9.0/src/capture.c#L581-L598https://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/sngrep-through-1.9.0-infinite-loop-dos-via-crafted-nflog-tlv