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Alpine Linux: CVE-2021-3618: Improper Certificate Validation

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Alpine Linux: CVE-2021-3618: Improper Certificate Validation

Severity
6
CVSS
(AV:N/AC:M/Au:N/C:P/I:P/A:N)
Published
03/23/2022
Created
03/22/2024
Added
03/26/2024
Modified
04/09/2024

Description

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.

Solution(s)

  • alpine-linux-upgrade-nginx

References

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