Twenty Year Anniversary

Ubuntu Security Notice USN-1520-1

Ubuntu Security Notice USN-1520-1
Posted Jul 31, 2012
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 1520-1 - 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. 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. Various other issues were also addressed.

tags | advisory, remote, denial of service, arbitrary
systems | linux, ubuntu
advisories | CVE-2012-1015, CVE-2012-1014, CVE-2012-1013, CVE-2012-1012, CVE-2012-1012, CVE-2012-1013, CVE-2012-1014, CVE-2012-1015
MD5 | 785121ba14deb07d09e780a9083a9e38

Ubuntu Security Notice USN-1520-1

Change Mirror Download
Content-Disposition: inline

==========================================================================Ubuntu Security Notice USN-1520-1
July 31, 2012

krb5 vulnerabilities
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 12.04 LTS
- Ubuntu 11.10
- Ubuntu 11.04
- Ubuntu 10.04 LTS

Summary:

Several security issues were fixed in Kerberos.

Software Description:
- 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 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:

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

Ubuntu 12.04 LTS:
krb5-admin-server 1.10+dfsg~beta1-2ubuntu0.3
krb5-kdc 1.10+dfsg~beta1-2ubuntu0.3
krb5-kdc-ldap 1.10+dfsg~beta1-2ubuntu0.3

Ubuntu 11.10:
krb5-admin-server 1.9.1+dfsg-1ubuntu2.3
krb5-kdc 1.9.1+dfsg-1ubuntu2.3
krb5-kdc-ldap 1.9.1+dfsg-1ubuntu2.3

Ubuntu 11.04:
krb5-admin-server 1.8.3+dfsg-5ubuntu2.3
krb5-kdc 1.8.3+dfsg-5ubuntu2.3
krb5-kdc-ldap 1.8.3+dfsg-5ubuntu2.3

Ubuntu 10.04 LTS:
krb5-admin-server 1.8.1+dfsg-2ubuntu0.11
krb5-kdc 1.8.1+dfsg-2ubuntu0.11
krb5-kdc-ldap 1.8.1+dfsg-2ubuntu0.11

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

References:
http://www.ubuntu.com/usn/usn-1520-1
CVE-2012-1012, CVE-2012-1013, CVE-2012-1014, CVE-2012-1015

Package Information:
https://launchpad.net/ubuntu/+source/krb5/1.10+dfsg~beta1-2ubuntu0.3
https://launchpad.net/ubuntu/+source/krb5/1.9.1+dfsg-1ubuntu2.3
https://launchpad.net/ubuntu/+source/krb5/1.8.3+dfsg-5ubuntu2.3
https://launchpad.net/ubuntu/+source/krb5/1.8.1+dfsg-2ubuntu0.11

Comments

RSS Feed Subscribe to this comment feed

No comments yet, be the first!

Login or Register to post a comment

File Archive:

September 2018

  • Su
  • Mo
  • Tu
  • We
  • Th
  • Fr
  • Sa
  • 1
    Sep 1st
    1 Files
  • 2
    Sep 2nd
    3 Files
  • 3
    Sep 3rd
    15 Files
  • 4
    Sep 4th
    15 Files
  • 5
    Sep 5th
    18 Files
  • 6
    Sep 6th
    18 Files
  • 7
    Sep 7th
    15 Files
  • 8
    Sep 8th
    2 Files
  • 9
    Sep 9th
    2 Files
  • 10
    Sep 10th
    16 Files
  • 11
    Sep 11th
    17 Files
  • 12
    Sep 12th
    15 Files
  • 13
    Sep 13th
    29 Files
  • 14
    Sep 14th
    21 Files
  • 15
    Sep 15th
    3 Files
  • 16
    Sep 16th
    1 Files
  • 17
    Sep 17th
    15 Files
  • 18
    Sep 18th
    16 Files
  • 19
    Sep 19th
    29 Files
  • 20
    Sep 20th
    18 Files
  • 21
    Sep 21st
    1 Files
  • 22
    Sep 22nd
    0 Files
  • 23
    Sep 23rd
    0 Files
  • 24
    Sep 24th
    0 Files
  • 25
    Sep 25th
    0 Files
  • 26
    Sep 26th
    0 Files
  • 27
    Sep 27th
    0 Files
  • 28
    Sep 28th
    0 Files
  • 29
    Sep 29th
    0 Files
  • 30
    Sep 30th
    0 Files

Top Authors In Last 30 Days

File Tags

Systems

packet storm

© 2018 Packet Storm. All rights reserved.

Services
Security Services
Hosting By
Rokasec
close