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Ubuntu 10.10/10.04 LTS: USN-1116-1 Critical DoS Due to Kerberos Issue

ubuntu
Calendar Grey April 19, 2011
Scroller Ubuntu
An exploit in the Kerberos system of Ubuntu can lead to service disruption for users. Information regarding the patch has been provided.
An unauthenticated remote user could crash the Kerberos service.

Summary

An unauthenticated remote user could crash the Kerberos service.

Software Description:

- krb5: MIT Kerberos services

Details:

Felipe Ortega discovered that kadmind did not correctly handle password

changing error conditions. An unauthenticated remote attacker could exploit

this to crash kadmind, leading to a denial of service.

Topics%20covered

Topics Covered

security advisory DoS Ubuntu attack krb5

Update Instructions

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

Ubuntu 10.10:
  krb5-admin-server               1.8.1+dfsg-5ubuntu0.7

Ubuntu 10.04 LTS:
  krb5-admin-server               1.8.1+dfsg-2ubuntu0.9

Ubuntu 9.10:
  krb5-admin-server               1.7dfsg~beta3-1ubuntu0.13

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

References

CVE-2011-0285

Severity
critical
Lowest
Low
Medium
High
Critical

April 19, 2011

Topics%20covered

Topics Covered

security advisory DoS Ubuntu attack krb5

Package Information

https://launchpad.net/ubuntu/+source/krb5/1.8.1+dfsg-5ubuntu0.7
https://launchpad.net/ubuntu/+source/krb5/1.8.1+dfsg-2ubuntu0.9
https://launchpad.net/ubuntu/+source/krb5/1.7dfsg~beta3-1ubuntu0.13

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