Novell iChain 2.2 before Support Pack 1 uses a shorter timeout for a non-existent user than a valid user, which makes it easier for remote attackers to guess usernames and conduct brute force password guessing.

References

• https://nvd.nist.gov/vuln/detail/CVE-2003-0637
• http://support.novell.com/cgi-bin/search/searchtid.cgi?/2966435.htm