USN-449-1: krb5 vulnerabilities

4 April 2007

krb5 vulnerabilities

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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)

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Update instructions

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

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
  • 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

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

References

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