USN-719-1: pam-krb5 vulnerabilities

12 February 2009

libpam-krb5 vulnerabilities

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

  • Ubuntu 8.10
  • Ubuntu 8.04 LTS

Software Description

  • libpam-krb5

Details

It was discovered that pam_krb5 parsed environment variables when run with setuid applications. A local attacker could exploit this flaw to bypass authentication checks and gain root privileges. (CVE-2009-0360)

Derek Chan discovered that pam_krb5 incorrectly handled refreshing existing credentials when used with setuid applications. A local attacker could exploit this to create or overwrite arbitrary files, and possibly gain root privileges. (CVE-2009-0361)

Update instructions

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

Ubuntu 8.10
libpam-krb5 - 3.10-1ubuntu0.8.10.1
Ubuntu 8.04 LTS
libpam-krb5 - 3.10-1ubuntu0.8.04.1

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