$ cve CVE-2003-0190 JSON

CVE-2003-0190 EXPLOIT

5.0

MEDIUM · CVSS 2.0 · EPSS 76.8% (pctl 100)

Patch early

A public exploit exists.

Description

OpenSSH-portable (OpenSSH) 3.6.1p1 and earlier with PAM support enabled immediately sends an error message when a user does not exist, which allows remote attackers to determine valid usernames via a timing attack.

Scoring

CVSS	5.0 (MEDIUM, v2.0)
Vector	AV:N/AC:L/Au:N/C:P/I:N/A:N
EPSS	76.75% — more likely to be exploited than 100% of all CVEs
Weakness	CWE-203
On CISA KEV	no
Public exploit	yes
Published	2003-05-12
Last modified	2026-06-16

Affected (6)

Vendor	Product
openbsd	openssh
openpkg	openpkg
siemens	scalance x204rna
siemens	scalance x204rna ecc
siemens	scalance x204rna ecc firmware
siemens	scalance x204rna firmware

Public exploits

Source	Title	Date
exploit-db	Portable OpenSSH 3.6.1p-PAM/4.1-SuSE - Timing Attack	2007-02-13
exploit-db	OpenSSH/PAM 3.6.1p1 - 'gossh.sh' Remote Users Ident	2003-05-02
exploit-db	OpenSSH/PAM 3.6.1p1 - Remote Users Discovery Tool	2003-04-30

References

→ the Explorer · watch your stack · NVD