Ubuntu Security Notices
USN-449-1

USN-449-1: krb5 vulnerabilities

Publication date

4 April 2007

Overview

krb5 vulnerabilities

Releases

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)

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)

Update instructions

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

Learn more about how to get the fixes.

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

Ubuntu Release	Package Version
6.10 edgy	krb5-telnetd – 1.4.3-9ubuntu1.2
	libkrb53 – 1.4.3-9ubuntu1.2
	libkadm55 – 1.4.3-9ubuntu1.2
6.06 dapper	krb5-telnetd – 1.4.3-5ubuntu0.3
	libkrb53 – 1.4.3-5ubuntu0.3
	libkadm55 – 1.4.3-5ubuntu0.3
5.10 breezy	krb5-telnetd – 1.3.6-4ubuntu0.2
	libkrb53 – 1.3.6-4ubuntu0.2
	libkadm55 – 1.3.6-4ubuntu0.2

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USN-449-1: krb5 vulnerabilities

Details

Update instructions

Reduce your security exposure

References