CVE-2001-1013: Red Hat Linux

Medium severity, CVSS 5.0. EPSS: 65.6% chance of exploitation in the next 30 days.

Apache on Red Hat Linux with with the UserDir directive enabled generates different error codes when a username exists and there is no public_html directory and when the username does not exist, which could allow remote attackers to determine valid usernames on the server.

Affected products

• Red Hat Linux: version 7.0 only

Published 2001-09-12. Last modified 2026-06-16.