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5.0

Novell iChain reveals valid usernames to attackers

CVE-2003-0637 · published 23 years ago
Summary

Novell iChain version 2.2 before Support Pack 1 responds faster when a login name does not exist, allowing outsiders to tell which usernames are real. Once they know a valid name, they can try many passwords until they succeed. Install Support Pack 1 or later and use account lockout or multi‑factor authentication to protect logins.

What to do

The CVE record does not list a fixed version. Check the vendor's site or the advisory links below - a fix may already be released.

Affected software
VendorProductAffected versions
novell ichain 2.2
cpe:2.3:a:novell:ichain:2.2:*:*:*:*:*:*:*
Original advisory text
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 passw...
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
Fix within
Internet-facing 14 days
Internal 60 days
  • Not known to be exploited
  • Can be exploited automatically (estimated)
  • Gives an attacker partial control (estimated)
Severity
5.0 Medium
Exploitation
1% chance of attack within 30 days
Type
CWE-203Observable Discrepancy
Timeline
Published27 Aug 2003
Updated31 Oct 2026
First seen29 Sep 2026
Sources
CVE-2003-0637 · NVD
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