Red Hat Security Advisory 2015-0794-01 - Kerberos is a networked authentication system which allows clients and servers to authenticate to each other with the help of a trusted third party, the Kerberos KDC. The following security issues are fixed with this release: A use-after-free flaw was found in the way the MIT Kerberos libgssapi_krb5 library processed valid context deletion tokens. An attacker able to make an application using the GSS-API library could call the gss_process_context_token() function and use this flaw to crash that application.
092ae20195bf4a7732cc962288fb80eeebadd65456efb91c9af412787b3822e3Red Hat Security Advisory 2015-0439-01 - A NULL pointer dereference flaw was found in the MIT Kerberos SPNEGO acceptor for continuation tokens. A remote, unauthenticated attacker could use this flaw to crash a GSSAPI-enabled server application. A buffer overflow was found in the KADM5 administration server when it was used with an LDAP back end for the KDC database. A remote, authenticated attacker could potentially use this flaw to execute arbitrary code on the system running kadmind. A use-after-free flaw was found in the way the MIT Kerberos libgssapi_krb5 library processed valid context deletion tokens. An attacker able to make an application using the GSS-API library call the gss_process_context_token() function could use this flaw to crash that application.
8fb3cb2b9059c57c7254cbf03e0d41bd0654d31056df1eba6018ce76a9148bb1Ubuntu Security Notice 2498-1 - It was discovered that Kerberos incorrectly sent old keys in response to a -randkey -keepold request. An authenticated remote attacker could use this issue to forge tickets by leveraging administrative access. This issue only affected Ubuntu 10.04 LTS, Ubuntu 12.04 LTS and Ubuntu 14.04 LTS. It was discovered that the libgssapi_krb5 library incorrectly processed security context handles. A remote attacker could use this issue to cause a denial of service, or possibly execute arbitrary code. Various other issues were also addressed.
14cf04451fcc79abacd9b37fd5284879a17bc1bb703511b11b1aa1544e5c6ec3Mandriva Linux Security Advisory 2015-009 - In MIT krb5, when kadmind is configured to use LDAP for the KDC database, an authenticated remote attacker can cause a NULL dereference by attempting to use a named ticket policy object as a password policy for a principal. The attacker needs to be authenticated as a user who has the elevated privilege for setting password policy by adding or modifying principals.
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