Ubuntu 12.04 LTS / 14.04 LTS / 15.04 / 15.10 : krb5 vulnerabilities (USN-2810-1)

Ubuntu Security Notice (C) 2015-2016 Canonical, Inc. / NASL script (C) 2015-2016 Tenable Network Security, Inc.


Synopsis :

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

Description :

It was discovered that the Kerberos kpasswd service incorrectly
handled certain UDP packets. A remote attacker could possibly use this
issue to cause resource consumption, resulting in a denial of service.
This issue only affected Ubuntu 12.04 LTS. (CVE-2002-2443)

It was discovered that Kerberos incorrectly handled null bytes in
certain data fields. A remote attacker could possibly use this issue
to cause a denial of service. This issue only affected Ubuntu 12.04
LTS and Ubuntu 14.04 LTS. (CVE-2014-5355)

It was discovered that the Kerberos kdcpreauth modules incorrectly
tracked certain client requests. A remote attacker could possibly use
this issue to bypass intended preauthentication requirements. This
issue only affected Ubuntu 14.04 LTS and Ubuntu 15.04. (CVE-2015-2694)

It was discovered that Kerberos incorrectly handled certain SPNEGO
packets. A remote attacker could possibly use this issue to cause a
denial of service. (CVE-2015-2695)

It was discovered that Kerberos incorrectly handled certain IAKERB
packets. A remote attacker could possibly use this issue to cause a
denial of service. (CVE-2015-2696, CVE-2015-2698)

It was discovered that Kerberos incorrectly handled certain TGS
requests. A remote attacker could possibly use this issue to cause a
denial of service. (CVE-2015-2697).

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 : 6.3
(CVSS2#E:U/RL:OF/RC:C)
Public Exploit Available : false

Family: Ubuntu Local Security Checks

Nessus Plugin ID: 86872 ()

Bugtraq ID:

CVE ID: CVE-2002-2443
CVE-2014-5355
CVE-2015-2694
CVE-2015-2695
CVE-2015-2696
CVE-2015-2697
CVE-2015-2698

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