5

CVE-2003-0190: openbsd openssh Observable Discrepancy

CVSS: 5.0v2.0MediumModified
AliasesDEBIAN-CVE-2003-0190
Published 02-05-2003Last modified 08-08-2024
Open JSON

Vulnerability summary

CVE-2003-0190 is a medium (CVSS 5.0) Observable Discrepancy vulnerability in openbsd openssh. EPSS estimates a 76.75% chance of exploitation in the next 30 days, higher than 99.5% of scored vulnerabilities. 5 public exploits are recorded.

Overall risk
45/100
0100
Medium · default modelHow is this calculated?
CVSS score
5.0/10
010
Medium · v2.0 (NVD)
EPSS score
76.75%
0%100%
Critical · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits5reference, exploit-database, metasploit

Timeline

  1. 02-05-2003
    PublishedVulnerability first disclosed.
  2. 08-08-2024
    Last modifiedVulnerability information updated.

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.

CVSS metrics

1 score · 1 source · 1 version

EPSS trend

Probability

76.75%

Chance of exploitation in the next 30 days

Percentile

100%

Versus all other CVEs

30-day change

0.00 pp

From 76.75% on 18-09-2026

18-09-202618-10-2026
EPSS score
76.75%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

5 found
  • referenceUnverified

    Exploit Reference (securityfocus.com)

    Maturity: unknown

  • exploit-databaseremotelinuxVerified

    OpenSSH/PAM 3.6.1p1 - 'gossh.sh' Remote Users Ident

    Maturity: weaponized

  • exploit-databaseremotelinuxVerified

    OpenSSH/PAM 3.6.1p1 - Remote Users Discovery Tool

    Maturity: weaponized

Show all 5 exploits
  • exploit-databaseremotemultipleVerified

    Portable OpenSSH 3.6.1p-PAM/4.1-SuSE - Timing Attack

    Maturity: weaponized

  • MetasploitMetasploitremoteUnverified

    SSH Username Enumeration

    auxiliary/scanner/ssh/ssh_enumusers

    Maturity: poc

Weaknesses

CWE · root cause

Affected systems

Siemens2 products
Debian1 product
  • openssh< 1:3.8.1p1-8.sarge.4
Openbsd1 product
Openpkg1 product

4 vendors · 5 products

References

11 links
Show all 11 references