openSUSE Security Update: Security update for libheimdal
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Announcement ID: openSUSE-SU-2018:2376-1
Rating: important
References: #1047218 #1071675 #1084909
Cross-References: CVE-2017-17439
Affected Products:
openSUSE Leap 42.3
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An update that solves one vulnerability and has two fixes
is now available.

Description:

This update for libheimdal to version 7.5.0 fixes the following issues:

The following security vulnerability was fixed:

– CVE-2017-17439: Fixed a remote denial of service vulnerability through
which remote unauthenticated attackers were able to crash the KDC by
sending a crafted UDP packet containing empty data fields for client
name or realm (boo#1071675)

The following other bugs were fixed:

– Override the build date (boo#1047218)
– Use constant hostname (boo#1084909)
– Handle long input lines when reloading database dumps
– In pre-forked mode, correctly clear the process ids of exited children,
allowing new child processes to replace the old.
– Fixed incorrect KDC response when no-cross realm TGT exists, allowing
client requests to fail quickly rather than time out after trying to get
a correct answer from each KDC.

Patch Instructions:

To install this openSUSE Security Update use the SUSE recommended installation methods
like YaST online_update or “zypper patch”.

Alternatively you can run the command listed for your product:

– openSUSE Leap 42.3:

zypper in -t patch openSUSE-2018-876=1

Package List:

– openSUSE Leap 42.3 (i586 x86_64):

libheimdal-7.5.0-9.1
libheimdal-debuginfo-7.5.0-9.1
libheimdal-debugsource-7.5.0-9.1
libheimdal-devel-7.5.0-9.1

References:

https://www.suse.com/security/cve/CVE-2017-17439.html
https://bugzilla.suse.com/1047218
https://bugzilla.suse.com/1071675
https://bugzilla.suse.com/1084909

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