Bug 1647246 (CVE-2018-16853) - CVE-2018-16853 samba: S4U2Self crash with MIT KDC build
Summary: CVE-2018-16853 samba: S4U2Self crash with MIT KDC build
Alias: CVE-2018-16853
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
Depends On: 1654093
Blocks: Embargoed1647248
TreeView+ depends on / blocked
Reported: 2018-11-07 00:10 UTC by Sam Fowler
Modified: 2021-02-16 22:47 UTC (History)
30 users (show)

Fixed In Version: samba 4.7.12, samba 4.8.7, samba 4.9.3
Doc Type: If docs needed, set a value
Doc Text:
Samba versions 4.7 and later, built with MIT Kerberos support, are vulnerable to a crash via the S4U2self extension. A user in a Samba Active Directory domain can crash the KDC when Samba is built in the non-default MIT Kerberos configuration.
Clone Of:
Last Closed: 2018-11-28 07:36:08 UTC

Attachments (Terms of Use)

Description Sam Fowler 2018-11-07 00:10:03 UTC
Samba versions 4.7 and later built with MIT Kerberos support are vulnerable to a crash via the S4U2self extension.

Upstream Bug:


Comment 2 Sam Fowler 2018-11-28 03:01:47 UTC
External Reference:


Comment 3 Sam Fowler 2018-11-28 03:02:10 UTC

Name: The Samba Team
Upstream: Isaac Boukris

Comment 4 Sam Fowler 2018-11-28 03:02:37 UTC
Created samba tracking bugs for this issue:

Affects: fedora-all [bug 1654093]

Comment 5 Huzaifa S. Sidhpurwala 2018-11-28 07:36:27 UTC

This flaw does not affect the version of samba shipped with Red Hat Enterprise Linux because there is no support for samba as Active Directory Domain Controller.

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