Amazon Linux 2023 Security Advisory: ALAS2023-2025-1321
Advisory Released Date: 2026-01-07
Advisory Updated Date: 2026-01-07
Severity:
Medium
Issue Overview:
crypto/x509: excluded subdomain constraint does not restrict wildcard SANs
An excluded subdomain constraint in a certificate chain does not restrict the usage of wildcard SANs in the leaf certificate. For example a constraint that excludes the subdomain test.example.com does not prevent a leaf certificate from claiming the SAN *.example.com. (CVE-2025-61727)
Within HostnameError.Error(), when constructing an error string, there is no limit to the number of hosts that will be printed out. Furthermore, the error string is constructed by repeated string concatenation, leading to quadratic runtime. Therefore, a certificate provided by a malicious actor can result in excessive resource consumption. (CVE-2025-61729)
Affected Packages:
cni-plugins
Issue Correction:
Run dnf update cni-plugins --releasever 2023.10.20260105 or dnf update --advisory ALAS2023-2025-1321 --releasever 2023.10.20260105 to update your system.
More information on how to update your system can be found on this page: Amazon Linux 2023 documentation
New Packages:
aarch64:
cni-plugins-1.7.1-1.amzn2023.0.4.aarch64
cni-plugins-debuginfo-1.7.1-1.amzn2023.0.4.aarch64
cni-plugins-debugsource-1.7.1-1.amzn2023.0.4.aarch64
src:
cni-plugins-1.7.1-1.amzn2023.0.4.src
x86_64:
cni-plugins-1.7.1-1.amzn2023.0.4.x86_64
cni-plugins-debuginfo-1.7.1-1.amzn2023.0.4.x86_64
cni-plugins-debugsource-1.7.1-1.amzn2023.0.4.x86_64