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RHSA-2009:0409: krb5 security update

Severity CVSS Published Added Modified
10 (AV:N/AC:L/Au:N/C:C/I:C/A:C) April 08, 2009 September 12, 2009 July 04, 2017


Kerberos is a network authentication system which allows clients andservers to authenticate to each other using symmetric encryption and atrusted third party, the Key Distribution Center (KDC).An input validation flaw was found in the ASN.1 (Abstract Syntax NotationOne) decoder used by MIT Kerberos. A remote attacker could use this flaw tocrash a network service using the MIT Kerberos library, such as kadmind orkrb5kdc, by causing it to dereference or free an uninitialized pointer.(CVE-2009-0846)All krb5 users should upgrade to these updated packages, which contain abackported patch to correct this issue. All running services using the MITKerberos libraries must be restarted for the update to take effect.

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