Amazon Linux 2 (EOS) Security Advisory: ALAS2-2026-3916
Advisory Released Date: 2026-09-08
Advisory Updated Date: 2026-09-08
A flaw was found in FreeIPA. The self-managed OTP token ACI does not require authentication and does not restrict which attributes may be added alongside the token entry. An unauthenticated LDAP client can exploit this, combined with a related flaw in the underlying directory server's ACI evaluation (tracked separately), to create an arbitrary attacker-controlled Kerberos principal and have it added to the administrators group. This allows a remote, unauthenticated attacker to obtain genuine FreeIPA administrator-group membership and perform administrative operations against the directory and, on SID-enabled deployments, other IdM services. (CVE-2026-76578)
Affected Packages:
ipa
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 ipa or yum update --advisory ALAS2-2026-3916 to update your system.
aarch64:
ipa-server-4.6.8-5.amzn2.17.6.aarch64
ipa-server-trust-ad-4.6.8-5.amzn2.17.6.aarch64
ipa-client-4.6.8-5.amzn2.17.6.aarch64
ipa-debuginfo-4.6.8-5.amzn2.17.6.aarch64
i686:
ipa-server-4.6.8-5.amzn2.17.6.i686
ipa-server-trust-ad-4.6.8-5.amzn2.17.6.i686
ipa-client-4.6.8-5.amzn2.17.6.i686
ipa-debuginfo-4.6.8-5.amzn2.17.6.i686
noarch:
python2-ipaserver-4.6.8-5.amzn2.17.6.noarch
ipa-server-common-4.6.8-5.amzn2.17.6.noarch
ipa-server-dns-4.6.8-5.amzn2.17.6.noarch
python2-ipaclient-4.6.8-5.amzn2.17.6.noarch
ipa-client-common-4.6.8-5.amzn2.17.6.noarch
ipa-python-compat-4.6.8-5.amzn2.17.6.noarch
python2-ipalib-4.6.8-5.amzn2.17.6.noarch
ipa-common-4.6.8-5.amzn2.17.6.noarch
src:
ipa-4.6.8-5.amzn2.17.6.src
x86_64:
ipa-server-4.6.8-5.amzn2.17.6.x86_64
ipa-server-trust-ad-4.6.8-5.amzn2.17.6.x86_64
ipa-client-4.6.8-5.amzn2.17.6.x86_64
ipa-debuginfo-4.6.8-5.amzn2.17.6.x86_64