|Bugzilla:||668719: CVE-2011-0281 krb5: KDC hang when using LDAP backend caused by special principal name (MITKRB5-SA-2011-002)|
The MITRE CVE dictionary describes this issue as:
The unparse implementation in the Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5) 1.6.x through 1.9, when an LDAP backend is used, allows remote attackers to cause a denial of service (file descriptor exhaustion and daemon hang) via a principal name that triggers use of a backslash escape sequence, as demonstrated by a \n sequence.
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.
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Red Hat security errata
|Red Hat Enterprise Linux version 5 (krb5)||RHSA-2011:0199||February 08, 2011|
|Red Hat Enterprise Linux version 6 (krb5)||RHSA-2011:0200||February 08, 2011|
Red Hat would like to thank the MIT Kerberos project for reporting this issue. Upstream acknowledges Kevin Longfellow of Oracle Corporation as the original reporter.
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