CVE-2019-18792

Katalog CVE

CVSS 9.1 · Critical EPSS 2,5%

Kerentanan Interpretation Conflict pada oisf suricata, debian linux. Skor CVSS 3.1 9.1 (Critical) menurut NVD.

Deskripsi (NVD)

An issue was discovered in Suricata 5.0.0. It is possible to bypass/evade any tcp based signature by overlapping a TCP segment with a fake FIN packet. The fake FIN packet is injected just before the PUSH ACK packet we want to bypass. The PUSH ACK packet (containing the data) will be ignored by Suricata because it overlaps the FIN packet (the sequence and ack number are identical in the two packets). The client will ignore the fake FIN packet because the ACK flag is not set. Both linux and windows clients are ignoring the injected packet.

Rincian

Terbit di NVD

6 Januari 2020

Terakhir diubah

17 Juni 2026

Status NVD

Modified

CVSS 3.1

9.1 (Critical), sumber NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H · uraikan di kalkulator

Jenis kelemahan (CWE)

CWE-436: Interpretation Conflict

EPSS (30 hari)

2,5% peluang dieksploitasi; lebih tinggi dari 84,4% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://github.com/OISF/suricata/commit/1c63d3905852f746ccde7e2585600b2199cefb4b patch · advisory pihak ketiga
• https://github.com/OISF/suricata/commit/fa692df37a796c3330c81988d15ef1a219afc006 patch · advisory pihak ketiga
• https://lists.debian.org/debian-lts-announce/2020/01/msg00032.html advisory pihak ketiga
• https://redmine.openinfosecfoundation.org/issues/3324 exploit · advisory pihak ketiga
• https://redmine.openinfosecfoundation.org/issues/3394 exploit · advisory pihak ketiga