Ubuntu Security Notice 1116-1 - 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.
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Ubuntu Security Notice USN-1116-1
April 19, 2011
krb5 vulnerability
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A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 10.10
- Ubuntu 10.04 LTS
- Ubuntu 9.10
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.
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
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