CVE-2026-121944: falha de média gravidade em irontec sngrep
sngrep through 1.9.0 Infinite Loop DoS via Crafted NFLOG TLV
Publicada em
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33Vexday Risk Score
Sem sinal de exploração. Ela tem prova de conceito 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
Produtos afetados
irontec · sngrepPoCs públicas encontradas — 1
cve_referencehackmd.io/@haindpwn/cve-2026-121943-121944-sngrep-sip-payload-missing-nul-oob-readnão verificado⚠ Recursos públicos, para você avaliar a exposição de sistemas que controla ou está autorizado a testar. Teste apenas com autorização.
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Referências
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