ALAS2023-2025-1327

References: CVE-2025-61727  CVE-2025-61729  CVE-2025-65637 
FAQs regarding Amazon Linux ALAS/CVE Severity

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)

A denial-of-service vulnerability exists in github.com/sirupsen/logrus when using Entry.Writer() to log a single-line payload larger than 64KB without newline characters. Due to limitations in the internal bufio.Scanner, the read fails with "token too long" and the writer pipe is closed, leaving Writer() unusable and causing application unavailability (DoS). This affects versions < 1.8.3, 1.9.0, and 1.9.2. The issue is fixed in 1.8.3, 1.9.1, and 1.9.3+, where the input is chunked and the writer continues to function even if an error is logged. (CVE-2025-65637)

Issue Correction:
Run dnf update amazon-ecr-credential-helper --releasever 2023.10.20260105 or dnf update --advisory ALAS2023-2025-1327 --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:
    amazon-ecr-credential-helper-0.11.0-2.amzn2023.aarch64

src:
    amazon-ecr-credential-helper-0.11.0-2.amzn2023.src

x86_64:
    amazon-ecr-credential-helper-0.11.0-2.amzn2023.x86_64