USN-916-1: Kerberos vulnerabilities

Ubuntu Security Notice USN-916-1

23rd March, 2010

krb5 vulnerabilities

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

  • Ubuntu 9.10

Software description

  • krb5

Details

Emmanuel Bouillon discovered that Kerberos did not correctly handle
certain message types. An unauthenticated remote attacker could send
specially crafted traffic to cause the KDC to crash, leading to a denial
of service. (CVE-2010-0283)

Nalin Dahyabhai, Jan iankko Lieskovsky, and Zbysek Mraz discovered
that Kerberos did not correctly handle certain GSS packets. An
unauthenticated remote attacker could send specially crafted traffic
that would cause services using GSS-API to crash, leading to a denial
of service. (CVE-2010-0628)

Update instructions

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

Ubuntu 9.10:
libgssapi-krb5-2 1.7dfsg~beta3-1ubuntu0.5
krb5-kdc 1.7dfsg~beta3-1ubuntu0.5

To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.

In general, a standard system upgrade is sufficient to effect the
necessary changes.

References

CVE-2010-0283, CVE-2010-0628