Ubuntu Security Notice USN-449-1
3rd April, 2007
krb5 vulnerabilities
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 6.10
- Ubuntu 6.06 LTS
- Ubuntu 5.10
Details
The krb5 telnet service did not appropriately verify user names. A
remote attacker could log in as the root user by requesting a specially
crafted user name. (CVE-2007-0956)
The krb5 syslog library did not correctly verify the size of log
messages. A remote attacker could send a specially crafted message and
execute arbitrary code with root privileges. (CVE-2007-0957)
The krb5 administration service was vulnerable to a double-free in the
GSS RPC library. A remote attacker could send a specially crafted
request and execute arbitrary code with root privileges. (CVE-2007-1216)
Update instructions
The problem can be corrected by updating your system to the following package version:
- Ubuntu 6.10:
- krb5-telnetd 1.4.3-9ubuntu1.2
- libkrb53 1.4.3-9ubuntu1.2
- libkadm55 1.4.3-9ubuntu1.2
- Ubuntu 6.06 LTS:
- krb5-telnetd 1.4.3-5ubuntu0.3
- libkrb53 1.4.3-5ubuntu0.3
- libkadm55 1.4.3-5ubuntu0.3
- Ubuntu 5.10:
- krb5-telnetd 1.3.6-4ubuntu0.2
- libkrb53 1.3.6-4ubuntu0.2
- libkadm55 1.3.6-4ubuntu0.2
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.