Amazon Linux 2023 Security Advisory: ALAS2023-2026-1453
Advisory Released Date: 2026-03-05
Advisory Updated Date: 2026-03-05
Severity:
Important
Issue Overview:
MUNGE is an authentication service for creating and validating user credentials. From 0.5 to 0.5.17, local attacker can exploit a buffer overflow vulnerability in munged (the MUNGE authentication daemon) to leak cryptographic key material from process memory. With the leaked key material, the attacker could forge arbitrary MUNGE credentials to impersonate any user (including root) to services that rely on MUNGE for authentication. The vulnerability allows a buffer overflow by sending a crafted message with an oversized address length field, corrupting munged's internal state and enabling extraction of the MAC subkey used for credential verification. This vulnerability is fixed in 0.5.18. (CVE-2026-25506)
Affected Packages:
munge
Issue Correction:
Run dnf update munge --releasever 2023.10.20260302 or dnf update --advisory ALAS2023-2026-1453 --releasever 2023.10.20260302 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:
munge-libs-debuginfo-0.5.14-7.amzn2023.0.5.aarch64
munge-debugsource-0.5.14-7.amzn2023.0.5.aarch64
munge-devel-0.5.14-7.amzn2023.0.5.aarch64
munge-libs-0.5.14-7.amzn2023.0.5.aarch64
munge-debuginfo-0.5.14-7.amzn2023.0.5.aarch64
munge-0.5.14-7.amzn2023.0.5.aarch64
src:
munge-0.5.14-7.amzn2023.0.5.src
x86_64:
munge-libs-debuginfo-0.5.14-7.amzn2023.0.5.x86_64
munge-devel-0.5.14-7.amzn2023.0.5.x86_64
munge-debuginfo-0.5.14-7.amzn2023.0.5.x86_64
munge-debugsource-0.5.14-7.amzn2023.0.5.x86_64
munge-libs-0.5.14-7.amzn2023.0.5.x86_64
munge-0.5.14-7.amzn2023.0.5.x86_64