Ubuntu 10.04 LTS / 12.04 LTS / 14.04 LTS : krb5 vulnerabilities (USN-2310-1)

Ubuntu Security Notice (C) 2014-2016 Canonical, Inc. / NASL script (C) 2014-2016 Tenable Network Security, Inc.


Synopsis :

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

Description :

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. (CVE-2012-1016)

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. (CVE-2013-1415)

It was discovered that Kerberos incorrectly handled certain crafted
TGS-REQ requests. A remote authenticated 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.
(CVE-2013-1416)

It was discovered that Kerberos incorrectly handled certain crafted
requests when multiple realms were configured. 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. (CVE-2013-1418, CVE-2013-6800)

It was discovered that Kerberos incorrectly handled certain invalid
tokens. If a remote attacker were able to perform a man-in-the-middle
attack, this flaw could be used to cause the daemon to crash,
resulting in a denial of service. (CVE-2014-4341, CVE-2014-4342)

It was discovered that Kerberos incorrectly handled certain mechanisms
when used with SPNEGO. If a remote attacker were able to perform a
man-in-the-middle attack, this flaw could be used to cause clients to
crash, resulting in a denial of service. (CVE-2014-4343)

It was discovered that Kerberos incorrectly handled certain
continuation tokens during SPNEGO negotiations. A remote attacker
could use this issue to cause the daemon to crash, resulting in a
denial of service. (CVE-2014-4344)

Tomas Kuthan and Greg Hudson discovered that the Kerberos kadmind
daemon incorrectly handled buffers when used with the LDAP backend. A
remote attacker could use this issue to cause the daemon to crash,
resulting in a denial of service, or possibly execute arbitrary code.
(CVE-2014-4345).

Note that Tenable Network Security has extracted the preceding
description block directly from the Ubuntu security advisory. Tenable
has attempted to automatically clean and format it as much as possible
without introducing additional issues.

Solution :

Update the affected packages.

Risk factor :

High / CVSS Base Score : 8.5
(CVSS2#AV:N/AC:M/Au:S/C:C/I:C/A:C)
CVSS Temporal Score : 7.4
(CVSS2#E:ND/RL:OF/RC:C)
Public Exploit Available : false

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