CVE-2010-1321: Canonical Ubuntu Linux

Medium severity, CVSS 6.8. EPSS: 6.9% chance of exploitation in the next 30 days.

The kg_accept_krb5 function in krb5/accept_sec_context.c in the GSS-API library in MIT Kerberos 5 (aka krb5) through 1.7.1 and 1.8 before 1.8.2, as used in kadmind and other applications, does not properly check for invalid GSS-API tokens, which allows remote authenticated users to cause a denial of service (NULL pointer dereference and daemon crash) via an AP-REQ message in which the authenticator's checksum field is missing.

Affected products

• Canonical Ubuntu Linux: version 6.06 only; version 8.04 only; version 9.04 only; version 9.10 only; version 10.04 only
• Debian Debian Linux: version 5.0 only; version 6.0 only
• Fedoraproject Fedora: version 11 only; version 12 only; version 13 only
• Mit Kerberos 5: up to and including 1.7.1; from 1.8, before 1.8.2 (fixed in 1.8.2)
• Opensuse Opensuse: version 11.0 only; version 11.1 only; version 11.2 only; version 11.3 only
• Oracle Database Server: affected versions not specified
• Suse Linux Enterprise Server: version 10 only; version 11 only

Published 2010-05-19. Last modified 2026-06-16.