Ubuntu 10.04 LTS / 10.10 / 11.04 / 11.10 : krb5 vulnerabilities (USN-1233-1)

Ubuntu Security Notice (C) 2011-2013 Canonical, Inc. / NASL script (C) 2011-2013 Tenable Network Security, Inc.


Synopsis :

The remote Ubuntu host is missing one or more security-related patches.

Description :

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. (CVE-2011-1527)

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. (CVE-2011-1528)

It was discovered that a NULL pointer dereference could occur in the
lookup_lockout_policy() function in the KDC LDAP and DB2 backends. An
unauthenticated remote attacker could use this to cause a denial of
service. (CVE-2011-1529).

Solution :

Update the affected krb5-kdc and / or krb5-kdc-ldap packages.

Risk factor :

High / CVSS Base Score : 7.8
(CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C)
CVSS Temporal Score : 6.4
(CVSS2#E:F/RL:OF/RC:C)
Public Exploit Available : true

Family: Ubuntu Local Security Checks

Nessus Plugin ID: 56556 ()

Bugtraq ID: 50273

CVE ID: CVE-2011-1527
CVE-2011-1528
CVE-2011-1529