Attachment 14633 Details for Bug 13678 – advisory text v2

advisory text v2

mit_no_security_advisory.txt (text/plain), 1.82 KB, created by Douglas Bagnall on 2018-11-08 01:01:59 UTC

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Creator: Douglas Bagnall

Created: 2018-11-08 01:01:59 UTC

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>====================================================================
>== Subject:     Samba AD DC S4U2Self Crash in experimental
>==              MIT Kerberos configuration (unsupported)
>==
>== CVE ID#:     None
>==
>== 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
>====================================================================
>

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