Bug 668726 (CVE-2011-0282)

Summary: CVE-2011-0282 krb5: KDC crash when using LDAP backend caused by a special principal name (MITKRB5-SA-2011-002)
Product: [Other] Security Response Reporter: Jan Lieskovsky <jlieskov>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED ERRATA QA Contact:
Severity: high Docs Contact:
Priority: high    
Version: unspecifiedCC: nalin, security-response-team, vdanen, wnefal+redhatbugzilla
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
URL: http://web.mit.edu/kerberos/advisories/MITKRB5-SA-2011-002.txt
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2012-06-21 09:31:07 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On: 671096, 671097, 671101, 671102, 676127    
Bug Blocks:    

Description Jan Lieskovsky 2011-01-11 11:59:52 UTC
A NULL pointer dereference flaw was found in the way
MIT Key Distribution Center (KDC) daemon processed
not-null terminated principal names in request for
ticket-granting ticket, when the krb5kdc daemon was
configured to use and LDAP back end. A remote attacker
could use this flaw to cause denial of service (krb5kdc
daemon crash) via a ticket-granting ticket request for
specially-crafted principal name.

Acknowledgements: 

Red Hat would like to thank the MIT Kerberos project for reporting
this issue.

Comment 4 Jan Lieskovsky 2011-01-20 09:31:25 UTC
This issue did NOT affect the versions of the krb5 package, as shipped
with Red Hat Enterprise Linux 3 or 4, as those versions do not support
LDAP back end / storage mechanism yet.

--

This issue affects the versions of the krb5 package, as shipped with
Red Hat Enterprise Linux 5 and 6.

--

This issue affects the versions of the krb5 package, as shipped with
Fedora release of 13 and 14.

Comment 7 Vincent Danen 2011-02-08 21:22:54 UTC
This issue is now public:

http://web.mit.edu/kerberos/advisories/MITKRB5-SA-2011-002.txt

Statement:

This issue did not affect the versions of krb5 as shipped with Red Hat Enterprise Linux 3 or 4 as they did not include support for the LDAP backend.

Comment 8 Vincent Danen 2011-02-08 21:38:48 UTC
Created krb5 tracking bugs for this issue

Affects: fedora-all [bug 676127]

Comment 9 errata-xmlrpc 2011-02-08 21:41:44 UTC
This issue has been addressed in following products:

  Red Hat Enterprise Linux 5

Via RHSA-2011:0199 https://rhn.redhat.com/errata/RHSA-2011-0199.html

Comment 10 errata-xmlrpc 2011-02-08 21:52:04 UTC
This issue has been addressed in following products:

  Red Hat Enterprise Linux 6

Via RHSA-2011:0200 https://rhn.redhat.com/errata/RHSA-2011-0200.html