CVE-2021-3618

Katalog CVE

CVSS 7.4 · High EPSS 2,0%

Kerentanan Improper Certificate Validation pada f5 nginx, sendmail +3 lainnya. Skor CVSS 3.1 7.4 (High) menurut NVD.

Deskripsi (NVD)

ALPACA is an application layer protocol content confusion attack, exploiting TLS servers implementing different protocols but using compatible certificates, such as multi-domain or wildcard certificates. A MiTM attacker having access to victim's traffic at the TCP/IP layer can redirect traffic from one subdomain to another, resulting in a valid TLS session. This breaks the authentication of TLS and cross-protocol attacks may be possible where the behavior of one protocol service may compromise the other at the application layer.

Rincian

Terbit di NVD

23 Maret 2022

Terakhir diubah

17 Juni 2026

Status NVD

Modified

CVSS 3.1

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

Jenis kelemahan (CWE)

CWE-295: Improper Certificate Validation

EPSS (30 hari)

2,0% peluang dieksploitasi; lebih tinggi dari 80,5% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://bugzilla.redhat.com/show_bug.cgi?id=1975623 issue tracking · patch · advisory pihak ketiga
• https://alpaca-attack.com/ advisory pihak ketiga
• https://lists.debian.org/debian-lts-announce/2022/11/msg00031.html mailing list · advisory pihak ketiga