Amazon Linux 2 (EOS) Security Advisory: ALAS2-2026-3909
Advisory Released Date: 2026-09-08
Advisory Updated Date: 2026-09-08
A flaw was found in 389 Directory Server. During SASL PLAIN authentication, a stale identity carried in a Cyrus SASL auxiliary property from a prior failed bind attempt can be installed on a connection following a subsequent, unrelated successful bind, regardless of which SASL mechanism completes that second bind. An attacker can send a SASL PLAIN bind as cn=Directory Manager with an incorrect password, then complete a SASL ANONYMOUS bind on the same connection, causing the server to grant Directory Manager authority without any valid credentials. A variant using a valid low-privileged account's own successful bind instead of an anonymous one is also possible. (CVE-2026-18922)
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 ALAS2-2026-3909 to update your system.
aarch64:
389-ds-base-1.3.10.2-17.amzn2.0.9.aarch64
389-ds-base-libs-1.3.10.2-17.amzn2.0.9.aarch64
389-ds-base-devel-1.3.10.2-17.amzn2.0.9.aarch64
389-ds-base-snmp-1.3.10.2-17.amzn2.0.9.aarch64
389-ds-base-debuginfo-1.3.10.2-17.amzn2.0.9.aarch64
i686:
389-ds-base-1.3.10.2-17.amzn2.0.9.i686
389-ds-base-libs-1.3.10.2-17.amzn2.0.9.i686
389-ds-base-devel-1.3.10.2-17.amzn2.0.9.i686
389-ds-base-snmp-1.3.10.2-17.amzn2.0.9.i686
389-ds-base-debuginfo-1.3.10.2-17.amzn2.0.9.i686
src:
389-ds-base-1.3.10.2-17.amzn2.0.9.src
x86_64:
389-ds-base-1.3.10.2-17.amzn2.0.9.x86_64
389-ds-base-libs-1.3.10.2-17.amzn2.0.9.x86_64
389-ds-base-devel-1.3.10.2-17.amzn2.0.9.x86_64
389-ds-base-snmp-1.3.10.2-17.amzn2.0.9.x86_64
389-ds-base-debuginfo-1.3.10.2-17.amzn2.0.9.x86_64