1. Ubuntu Security Notices
  2. USN-1520-1

USN-1520-1: Kerberos vulnerabilities

Publication date

31 July 2012

Overview

Several security issues were fixed in Kerberos.

Releases

Packages

  • krb5 - MIT Kerberos Network Authentication Protocol

Details

Emmanuel Bouillon discovered that the MIT krb5 Key Distribution Center
(KDC) daemon could free an uninitialized pointer when handling a
malformed AS-REQ message. A remote unauthenticated attacker could
use this to cause a denial of service or possibly execute arbitrary
code. (CVE-2012-1015)

Emmanuel Bouillon discovered that the MIT krb5 Key Distribution Center
(KDC) daemon could dereference an uninitialized pointer while handling
a malformed AS-REQ message. A remote unauthenticated attacker could
use this to cause a denial of service or possibly execute arbitrary
code. This issue only affected Ubuntu 12.04 LTS. (CVE-2012-1014)

Simo Sorce discovered that the MIT krb5 Key Distribution Center (KDC)
daemon could dereference a NULL pointer when handling a malformed
TGS-REQ message. A remote authenticated attacker could use this to
cause a denial of...

Emmanuel Bouillon discovered that the MIT krb5 Key Distribution Center
(KDC) daemon could free an uninitialized pointer when handling a
malformed AS-REQ message. A remote unauthenticated attacker could
use this to cause a denial of service or possibly execute arbitrary
code. (CVE-2012-1015)

Emmanuel Bouillon discovered that the MIT krb5 Key Distribution Center
(KDC) daemon could dereference an uninitialized pointer while handling
a malformed AS-REQ message. A remote unauthenticated attacker could
use this to cause a denial of service or possibly execute arbitrary
code. This issue only affected Ubuntu 12.04 LTS. (CVE-2012-1014)

Simo Sorce discovered that the MIT krb5 Key Distribution Center (KDC)
daemon could dereference a NULL pointer when handling a malformed
TGS-REQ message. A remote authenticated attacker could use this to
cause a denial of service. (CVE-2012-1013)

It was discovered that the kadmin protocol implementation in MIT krb5
did not properly restrict access to the SET_STRING and GET_STRINGS
operations. A remote authenticated attacker could use this to expose
or modify sensitive information. This issue only affected Ubuntu
12.04 LTS. (CVE-2012-1012)

Update instructions

In general, a standard system update will make all the necessary changes.

Learn more about how to get the fixes.

The problem can be corrected by updating your system to the following package versions:

Ubuntu Release Package Version
12.04 precise krb5-admin-server –  1.10+dfsg~beta1-2ubuntu0.3
krb5-kdc-ldap –  1.10+dfsg~beta1-2ubuntu0.3
krb5-kdc –  1.10+dfsg~beta1-2ubuntu0.3
11.10 oneiric krb5-admin-server –  1.9.1+dfsg-1ubuntu2.3
krb5-kdc-ldap –  1.9.1+dfsg-1ubuntu2.3
krb5-kdc –  1.9.1+dfsg-1ubuntu2.3
11.04 natty krb5-admin-server –  1.8.3+dfsg-5ubuntu2.3
krb5-kdc-ldap –  1.8.3+dfsg-5ubuntu2.3
krb5-kdc –  1.8.3+dfsg-5ubuntu2.3
10.04 lucid krb5-admin-server –  1.8.1+dfsg-2ubuntu0.11
krb5-kdc-ldap –  1.8.1+dfsg-2ubuntu0.11
krb5-kdc –  1.8.1+dfsg-2ubuntu0.11

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References

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