ALT-PU-2022-5512-1
Closed vulnerabilities
Published: 2022-03-23
Modified: 2024-11-21
Modified: 2024-11-21
CVE-2021-3618
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.
Severity: HIGH (7.4)
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
References:
- https://alpaca-attack.com/
- https://alpaca-attack.com/
- https://bugzilla.redhat.com/show_bug.cgi?id=1975623
- https://bugzilla.redhat.com/show_bug.cgi?id=1975623
- [debian-lts-announce] 20221122 [SECURITY] [DLA 3203-1] nginx security update
- [debian-lts-announce] 20221122 [SECURITY] [DLA 3203-1] nginx security update