CVE-2004-1602

NUCLEI

ProFTPD 1.2.0-1.2.10 - Username Enumeration via Timing Discrepancy

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2004-1602. PoCs published by Leon Juranic. A Nuclei detection template is also available.

AI-analyzed exploit summary This exploit leverages a timing attack during the ProFTPD login procedure to determine valid usernames by measuring microsecond-level delays in server responses. It sends multiple 'USER' commands and calculates the average response time to infer user existence.

Description

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.

Exploits (1)

exploitdb WORKING POC VERIFIED
by Leon Juranic · cremotelinux
https://www.exploit-db.com/exploits/581

This exploit leverages a timing attack during the ProFTPD login procedure to determine valid usernames by measuring microsecond-level delays in server responses. It sends multiple 'USER' commands and calculates the average response time to infer user existence.

Classification
Working Poc 90%
Attack Type
Info Leak
Complexity
Moderate
Reliability
Reliable
Target: ProFTPD 1.2.10 and below
No auth needed
Prerequisites: network access to the ProFTPD server · ability to send raw TCP packets to port 21
devstral-2 · analyzed Feb 16, 2026 Full analysis →

Nuclei Templates (1)

ProFTPD 1.2.x - Username Enumeration via Timing Attack
MEDIUMVERIFIEDby pussycat0x
Shodan: product:"proftpd" || cpe:"cpe:2.3:a:proftpd:proftpd"

References (5)

Core 5
Core References
Broken Link, Exploit, Patch, Third Party Advisory, VDB Entry, Vendor Advisory vdb-entry x_refsource_sectrack
http://securitytracker.com/id?1011687
Broken Link, Exploit, Patch, Vendor Advisory x_refsource_misc
http://security.lss.hr/index.php?page=details&ID=LSS-2004-10-02
Broken Link, Exploit, Third Party Advisory, VDB Entry, Vendor Advisory vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/11430
Third Party Advisory, VDB Entry vdb-entry x_refsource_xf
https://exchange.xforce.ibmcloud.com/vulnerabilities/17724
Third Party Advisory mailing-list x_refsource_bugtraq
http://marc.info/?l=bugtraq&m=109786760926133&w=2

Scores

EPSS 0.0078
EPSS Percentile 74.1%

Details

CWE
CWE-203
Status published
Products (1)
proftpd/proftpd 1.2.0 - 1.2.10
Published Oct 15, 2004
Tracked Since Feb 18, 2026