Improper Certificate Validation Affecting nginx package, versions <1.16.1-150000.3.18.1


Severity

Recommended
0.0
high
0
10

Based on SUSE Linux Enterprise Server security rating.

Threat Intelligence

EPSS
0.45% (63rd percentile)

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  • Snyk IDSNYK-SLES150-NGINX-3147000
  • published24 Nov 2022
  • disclosed23 Nov 2022

Introduced: 23 Nov 2022

CVE-2021-3618  (opens in a new tab)
CWE-295  (opens in a new tab)

How to fix?

Upgrade SLES:15.0 nginx to version 1.16.1-150000.3.18.1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream nginx package and not the nginx package as distributed by SLES. See How to fix? for SLES:15.0 relevant fixed versions and status.

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.

CVSS Base Scores

version 3.1