Bugzilla – Bug 1116324
VUL-0: CVE-2018-16853: samba: Mark MIT support for the AD DC experimental (related to CVE-2018-16853)
Last modified: 2019-11-30 15:39:11 UTC
https://www.samba.org/samba/security/CVE-2018-16853.html CVE-2018-16853.html ==================================================================== == Subject: Samba AD DC S4U2Self Crash in experimental == MIT Kerberos configuration (unsupported) == == CVE ID#: CVE-2018-16853 == == Versions: Samba 4.7.0 and later versions == == Summary: A user in a Samba AD domain can crash the MIT KDC == by requesting an S4U2Self ticket. ==================================================================== =========== Description =========== A user in a Samba AD domain can crash the KDC when Samba is built in the non-default MIT Kerberos configuration. With this advisory we clarify that the MIT Kerberos build of the Samba AD DC is considered experimental. Therefore the Samba Team will not issue security patches for this configuration. ================== Patch Availability ================== Patches addressing parts of this issue have been posted to: https://bugzilla.samba.org/show_bug.cgi?id=13571 Additionally, Samba 4.7.12, 4.8.7 and 4.9.3 have been issued as security releases to prevent building of the AD DC with MIT Kerberos unless --with-experimental-mit-ad-dc is specified to the configure command. Samba administrators are advised to recompile Samba with the default internal Heimdal Kerberos build as soon as possible by removing --with-system-mitkrb5 from the configure command and rebuilding Samba. ========================= Workaround and mitigation ========================= The default Heimdal build of Samba is not vulnerable. ======= Credits ======= Originally reported by Isaac Boukris. Patches to disable the build provided by Andrew Bartlett of Catalyst and the Samba team. ==================================================================== == Our Code, Our Bugs, Our Responsibility. == The Samba Team ====================================================================
SUSE-SU-2018:4066-1: An update that solves four vulnerabilities and has 5 fixes is now available. Category: security (moderate) Bug References: 1068059,1087303,1087931,1101499,1102230,1116319,1116320,1116322,1116324 CVE References: CVE-2018-14629,CVE-2018-16841,CVE-2018-16851,CVE-2018-16853 Sources used: SUSE Linux Enterprise Module for Packagehub Subpackages 15 (src): samba-4.7.11+git.140.6bd0e5b30d8-4.21.1 SUSE Linux Enterprise Module for Open Buildservice Development Tools 15 (src): samba-4.7.11+git.140.6bd0e5b30d8-4.21.1 SUSE Linux Enterprise Module for Basesystem 15 (src): samba-4.7.11+git.140.6bd0e5b30d8-4.21.1 SUSE Linux Enterprise High Availability 15 (src): samba-4.7.11+git.140.6bd0e5b30d8-4.21.1
Released.