Amazon Linux 2 (EOS) Security Advisory: ALAS2-2026-3956
Advisory Released Date: 2026-09-28
Advisory Updated Date: 2026-09-28
A flaw was found in 389 Directory Server. The SELFDN ACI bind-rule evaluator incorrectly matches an anonymous LDAP client's empty bind DN against an empty stored attribute value, allowing an unauthenticated client to satisfy access control checks intended to require a matching authenticated identity. This can allow an anonymous LDAP client to perform an operation, such as adding or modifying a directory entry, that a SELFDN-based ACI intended to restrict to a specific authenticated user. (CVE-2026-76560)
Affected Packages:
389-ds-base
Note:
This advisory is applicable to Amazon Linux 2 (AL2) Core repository. Visit this FAQ section for the difference between AL2 Core and AL2 Extras advisories.
Issue Correction:
Run yum update 389-ds-base or yum update --advisory ALAS2-2026-3956 to update your system.
aarch64:
389-ds-base-1.3.10.2-17.amzn2.0.13.aarch64
389-ds-base-libs-1.3.10.2-17.amzn2.0.13.aarch64
389-ds-base-devel-1.3.10.2-17.amzn2.0.13.aarch64
389-ds-base-snmp-1.3.10.2-17.amzn2.0.13.aarch64
389-ds-base-debuginfo-1.3.10.2-17.amzn2.0.13.aarch64
i686:
389-ds-base-1.3.10.2-17.amzn2.0.13.i686
389-ds-base-libs-1.3.10.2-17.amzn2.0.13.i686
389-ds-base-devel-1.3.10.2-17.amzn2.0.13.i686
389-ds-base-snmp-1.3.10.2-17.amzn2.0.13.i686
389-ds-base-debuginfo-1.3.10.2-17.amzn2.0.13.i686
src:
389-ds-base-1.3.10.2-17.amzn2.0.13.src
x86_64:
389-ds-base-1.3.10.2-17.amzn2.0.13.x86_64
389-ds-base-libs-1.3.10.2-17.amzn2.0.13.x86_64
389-ds-base-devel-1.3.10.2-17.amzn2.0.13.x86_64
389-ds-base-snmp-1.3.10.2-17.amzn2.0.13.x86_64
389-ds-base-debuginfo-1.3.10.2-17.amzn2.0.13.x86_64