CVE-2003-0190
MEDIUMEPSS 99th pctlDescription
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.
How to fix
TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works
Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.
CVSS v2 Vector
No CVSS vector data available.
Exploit Intelligence
Very high risk: more likely to be exploited than 99% of all known CVEs.
References
Related Vulnerabilities
Other CWE-203 vulnerabilities, ordered by exploit likelihood. View all
| CVE | Severity | CVSS | EPSS | Exploited | Fix |
|---|---|---|---|---|---|
| CVE-2017-5753 | Medium | 5.6 | 94% | - | Fix |
| CVE-2017-5715 | Medium | 5.6 | 74% | - | Fix |
| CVE-2018-3639 | Medium | 5.5 | 61% | - | Fix |
| CVE-2023-28770 | High | 7.5 | 58% | - | Fix |
| CVE-2004-1602 | Medium | 5.0 | 31% | - | - |
| CVE-2017-13099 | High | 7.5 | 25% | - | Fix |
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Markdown
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TridentStack Control continuously scans your Windows, macOS, and Linux fleet for known vulnerabilities, prioritizes them by severity and active exploitation, and patches them automatically.
This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-04-16.