Gentoo Linux Security Advisory 201201-13 - Multiple vulnerabilities have been found in MIT Kerberos 5, the most severe of which may allow remote execution of arbitrary code. Versions less than 1.9.2-r1 are affected.
5fe5b981b497ad572aa4e53428ce29f2dcd53be74dc124715f4b3cff09100dd9Mandriva Linux Security Advisory 2011-159 - The kdb_ldap plugin in the Key Distribution Center in MIT Kerberos 5 1.9 through 1.9.1, when the LDAP back end is used, allows remote attackers to cause a denial of service via a kinit operation with incorrect string case for the realm, related to the is_principal_in_realm, krb5_set_error_message, krb5_ldap_get_principal, and process_as_req functions. The krb5_ldap_lockout_audit function in the Key Distribution Center 1.8 through 1.8.4 and 1.9 through 1.9.1, when the LDAP back end is used, allows remote attackers to cause a denial of service via unspecified vectors, related to the locked_check_p function. The lookup_lockout_policy function in the Key Distribution Center in MIT Kerberos 5 1.8 through 1.8.4 and 1.9 through 1.9.1, when the db2 or LDAP back end is used, allows remote attackers to cause a denial of service (NULL pointer dereference and daemon crash) via vectors that trigger certain process_as_req errors. The updated packages have been patched to correct these issues.
160ee6d63219f4df8bde7d3c04e4d92dd792086ff9d166e64e365f50ecc5c75eMIT krb5 Security Advisory 2011-006 - In releases krb5-1.9 and later, the KDC can crash due to a null pointer dereference if configured to use the LDAP back end. A trigger condition is publicly known but not known to be widely circulated. In releases krb5-1.8 and later, the KDC can crash due to an assertion failure. No exploit is known to exist, but there is public evidence that the unidentified trigger condition occurs in the field. In releases krb5-1.8 and later, the KDC can crash due to a null pointer dereference. No exploit is known to exist.
8b04ece8c34bca3fda0990a86bfcf42198a26b09a9a26da0008d965a7b170253Ubuntu Security Notice 1233-1 - Nalin Dahyabhai, Andrej Ota and Kyle Moffett discovered a NULL pointer dereference in the KDC LDAP backend. An unauthenticated remote attacker could use this to cause a denial of service. This issue affected Ubuntu 11.10. Mark Deneen discovered that an assert() could be triggered in the krb5_ldap_lockout_audit() function in the KDC LDAP backend and the krb5_db2_lockout_audit() function in the KDC DB2 backend. An unauthenticated remote attacker could use this to cause a denial of service. Various other issues were also addressed.
260023c2168a6d777713e24fc88c1d9f550cbd57d478d0bfa9df694c73399e85Red Hat Security Advisory 2011-1379-01 - Kerberos is a network authentication system which allows clients and servers to authenticate to each other using symmetric encryption and a trusted third-party, the Key Distribution Center. Multiple NULL pointer dereference and assertion failure flaws were found in the MIT Kerberos KDC when it was configured to use an LDAP or Berkeley Database back end. A remote attacker could use these flaws to crash the KDC.
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