Amazon Linux 2023 Security Advisory: ALAS-2023-018
Advisory Release Date: 2023-02-17 20:43 Pacific
Advisory Updated Date: 2023-02-22 23:50 Pacific
Severity:
Medium
Issue Overview:
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. (CVE-2021-3618)
Affected Packages:
sendmail
Issue Correction:
Run dnf update sendmail --releasever=2023.0.20230222 to update your system.
New Packages:
aarch64:
sendmail-debuginfo-8.17.1-5.amzn2023.0.4.aarch64
sendmail-milter-debuginfo-8.17.1-5.amzn2023.0.4.aarch64
sendmail-debugsource-8.17.1-5.amzn2023.0.4.aarch64
sendmail-milter-devel-8.17.1-5.amzn2023.0.4.aarch64
sendmail-milter-8.17.1-5.amzn2023.0.4.aarch64
sendmail-8.17.1-5.amzn2023.0.4.aarch64
noarch:
sendmail-cf-8.17.1-5.amzn2023.0.4.noarch
sendmail-doc-8.17.1-5.amzn2023.0.4.noarch
src:
sendmail-8.17.1-5.amzn2023.0.4.src
x86_64:
sendmail-debuginfo-8.17.1-5.amzn2023.0.4.x86_64
sendmail-milter-debuginfo-8.17.1-5.amzn2023.0.4.x86_64
sendmail-debugsource-8.17.1-5.amzn2023.0.4.x86_64
sendmail-milter-8.17.1-5.amzn2023.0.4.x86_64
sendmail-milter-devel-8.17.1-5.amzn2023.0.4.x86_64
sendmail-8.17.1-5.amzn2023.0.4.x86_64