Advisory Published

USN-5675-1: Heimdal vulnerabilities

First published: Thu Oct 13 2022(Updated: )

Isaac Boukris and Andrew Bartlett discovered that Heimdal's KDC was not properly performing checksum algorithm verifications in the S4U2Self extension module. An attacker could possibly use this issue to perform a machine-in-the-middle attack and request S4U2Self tickets for any user known by the application. This issue only affected Ubuntu 14.04 ESM, Ubuntu 16.04 ESM and Ubuntu 18.04 LTS. (CVE-2018-16860) It was discovered that Heimdal was not properly handling the verification of key exchanges when an anonymous PKINIT was being used. An attacker could possibly use this issue to perform a machine-in-the-middle attack and expose sensitive information. This issue only affected Ubuntu 14.04 ESM, Ubuntu 16.04 ESM and Ubuntu 18.04 LTS. (CVE-2019-12098) Joseph Sutton discovered that Heimdal was not properly handling memory management operations when dealing with TGS-REQ tickets that were missing information. An attacker could possibly use this issue to cause a denial of service. (CVE-2021-3671) Michał Kępień discovered that Heimdal was not properly handling logical conditions that related to memory management operations. An attacker could possibly use this issue to cause a denial of service. (CVE-2022-3116)

Affected SoftwareAffected VersionHow to fix
All of
ubuntu/libgssapi3-heimdal<7.7.0+dfsg-1ubuntu1.1
7.7.0+dfsg-1ubuntu1.1
=20.04
All of
ubuntu/heimdal-kcm<7.7.0+dfsg-1ubuntu1.1
7.7.0+dfsg-1ubuntu1.1
=20.04
All of
ubuntu/heimdal-kdc<7.7.0+dfsg-1ubuntu1.1
7.7.0+dfsg-1ubuntu1.1
=20.04
All of
ubuntu/libkdc2-heimdal<7.7.0+dfsg-1ubuntu1.1
7.7.0+dfsg-1ubuntu1.1
=20.04
All of
ubuntu/heimdal-servers<7.7.0+dfsg-1ubuntu1.1
7.7.0+dfsg-1ubuntu1.1
=20.04
All of
ubuntu/libkrb5-26-heimdal<7.7.0+dfsg-1ubuntu1.1
7.7.0+dfsg-1ubuntu1.1
=20.04
All of
ubuntu/heimdal-clients<7.7.0+dfsg-1ubuntu1.1
7.7.0+dfsg-1ubuntu1.1
=20.04
All of
ubuntu/libgssapi3-heimdal<7.5.0+dfsg-1ubuntu0.1
7.5.0+dfsg-1ubuntu0.1
=18.04
All of
ubuntu/heimdal-kcm<7.5.0+dfsg-1ubuntu0.1
7.5.0+dfsg-1ubuntu0.1
=18.04
All of
ubuntu/heimdal-kdc<7.5.0+dfsg-1ubuntu0.1
7.5.0+dfsg-1ubuntu0.1
=18.04
All of
ubuntu/libkdc2-heimdal<7.5.0+dfsg-1ubuntu0.1
7.5.0+dfsg-1ubuntu0.1
=18.04
All of
ubuntu/heimdal-servers<7.5.0+dfsg-1ubuntu0.1
7.5.0+dfsg-1ubuntu0.1
=18.04
All of
ubuntu/libkrb5-26-heimdal<7.5.0+dfsg-1ubuntu0.1
7.5.0+dfsg-1ubuntu0.1
=18.04
All of
ubuntu/heimdal-clients<7.5.0+dfsg-1ubuntu0.1
7.5.0+dfsg-1ubuntu0.1
=18.04
All of
ubuntu/libgssapi3-heimdal<1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm1
1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm1
=16.04
All of
ubuntu/heimdal-kcm<1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm1
1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm1
=16.04
All of
ubuntu/heimdal-kdc<1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm1
1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm1
=16.04
All of
ubuntu/libkdc2-heimdal<1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm1
1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm1
=16.04
All of
ubuntu/heimdal-servers<1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm1
1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm1
=16.04
All of
ubuntu/libkrb5-26-heimdal<1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm1
1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm1
=16.04
All of
ubuntu/heimdal-clients<1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm1
1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm1
=16.04
All of
ubuntu/heimdal-servers-x<1.6~git20131207+dfsg-1ubuntu1.2+esm1
1.6~git20131207+dfsg-1ubuntu1.2+esm1
=14.04
All of
ubuntu/libgssapi3-heimdal<1.6~git20131207+dfsg-1ubuntu1.2+esm1
1.6~git20131207+dfsg-1ubuntu1.2+esm1
=14.04
All of
ubuntu/heimdal-kcm<1.6~git20131207+dfsg-1ubuntu1.2+esm1
1.6~git20131207+dfsg-1ubuntu1.2+esm1
=14.04
All of
ubuntu/heimdal-kdc<1.6~git20131207+dfsg-1ubuntu1.2+esm1
1.6~git20131207+dfsg-1ubuntu1.2+esm1
=14.04
All of
ubuntu/libkdc2-heimdal<1.6~git20131207+dfsg-1ubuntu1.2+esm1
1.6~git20131207+dfsg-1ubuntu1.2+esm1
=14.04
All of
ubuntu/heimdal-servers<1.6~git20131207+dfsg-1ubuntu1.2+esm1
1.6~git20131207+dfsg-1ubuntu1.2+esm1
=14.04
All of
ubuntu/heimdal-clients-x<1.6~git20131207+dfsg-1ubuntu1.2+esm1
1.6~git20131207+dfsg-1ubuntu1.2+esm1
=14.04
All of
ubuntu/libkrb5-26-heimdal<1.6~git20131207+dfsg-1ubuntu1.2+esm1
1.6~git20131207+dfsg-1ubuntu1.2+esm1
=14.04
All of
ubuntu/heimdal-clients<1.6~git20131207+dfsg-1ubuntu1.2+esm1
1.6~git20131207+dfsg-1ubuntu1.2+esm1
=14.04

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