Ubuntu Security Notice USN-719-1
12th 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 version:
- 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.