Observable discrepancy in ProFTPD - CVE-2004-1602
Published: February 15, 2024 / Updated: June 23, 2025
Vulnerability identifier: #VU111814
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2004-1602
CWE-ID: CWE-203
Exploitation vector: Remote access
Exploit availability:
Public exploit is available
Vulnerability details
The vulnerability allows a remote non-authenticated attacker to gain access to sensitive information.
ProFTPD 1.2.x, including 1.2.8 and 1.2.10, responds in a different amount of time when a given username exists, which allows remote attackers to identify valid usernames by timing the server response.
Affected software
ProFTPD
How to mitigate CVE-2004-1602
Install update from vendor's website.