Ubuntu Security Notice 2310-1 - It was discovered that Kerberos incorrectly handled certain crafted Draft 9 requests. A remote attacker could use this issue to cause the daemon to crash, resulting in a denial of service. This issue only affected Ubuntu 12.04 LTS. It was discovered that Kerberos incorrectly handled certain malformed KRB5_PADATA_PK_AS_REQ AS-REQ requests. A remote attacker could use this issue to cause the daemon to crash, resulting in a denial of service. This issue only affected Ubuntu 10.04 LTS and Ubuntu 12.04 LTS. Various other issues were also addressed.
58d3eb1fd12379457b7d374a0622ac5c590760d80a72c972ae312eb6169fd50cGentoo Linux Security Advisory 201312-12 - Multiple vulnerabilities have been discovered in MIT Kerberos 5, allowing execution of arbitrary code or Denial of Service. Versions less than 1.11.4 are affected.
2889e0196fe0b9aaeb676d58c3158d721d6a9e4252a764b323f60b1d630fde77Mandriva Linux Security Advisory 2013-158 - The prep_reprocess_req function in do_tgs_req.c in the Key Distribution Center before 1.10.5 does not properly perform service-principal realm referral, which allows remote authenticated users to cause a denial of service (NULL pointer dereference and daemon crash) via a crafted TGS-REQ request. The updated packages have been patched to correct this issue.
39cd223b2070c1e9da32d7df478ea030fc5680a222d44d15d868e6a8e52a7efaMandriva Linux Security Advisory 2013-157 - The pkinit_check_kdc_pkid function in plugins/preauth/pkinit/pkinit_crypto_openssl.c in the PKINIT implementation in the Key Distribution Center in MIT Kerberos 5 before 1.10.4 and 1.11.x before 1.11.1 does not properly handle errors during extraction of fields from an X.509 certificate, which allows remote attackers to cause a denial of service via a malformed KRB5_PADATA_PK_AS_REQ AS-REQ request. The prep_reprocess_req function in do_tgs_req.c in the Key Distribution Center before 1.10.5 does not properly perform service-principal realm referral, which allows remote authenticated users to cause a denial of service (NULL pointer dereference and daemon crash) via a crafted TGS-REQ request. The updated packages have been patched to correct these issues.
199f5a10f9c3952ec28914507f3f5a6dc8411e3c44dfd7e08218fe1c6eb08789Red Hat Security Advisory 2013-0748-01 - 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. A NULL pointer dereference flaw was found in the way the MIT Kerberos KDC processed certain TGS requests. A remote, authenticated attacker could use this flaw to crash the KDC via a specially-crafted TGS request. All krb5 users should upgrade to these updated packages, which contain a backported patch to correct this issue. After installing the updated packages, the krb5kdc daemon will be restarted automatically.
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