CVE-2003-0190

NONECVSS 0.0Weaponized

0.0

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 v3: —
EG Score: —
EPSS: 95.7%
KEV: Not listed

Published

May 12, 2003

Last Modified

April 16, 2026

References (20)

cve@mitrehttp://lab.mediaservice.net/advisory/2003-01-openssh.txt
cve@mitrehttp://lists.grok.org.uk/pipermail/full-disclosure/2003-April/004815.html
cve@mitrehttp://marc.info/?l=bugtraq&m=105172058404810&w=2
cve@mitrehttp://marc.info/?l=bugtraq&m=106018677302607&w=2
cve@mitrehttp://www.redhat.com/support/errata/RHSA-2003-222.html
cve@mitrehttp://www.redhat.com/support/errata/RHSA-2003-224.html
cve@mitrehttp://www.securityfocus.com/bid/7467
cve@mitrehttp://www.turbolinux.com/security/TLSA-2003-31.txt
cve@mitrehttps://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf
cve@mitrehttps://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A445
af854a3a-2127-422b-91ae-364da2661108http://lab.mediaservice.net/advisory/2003-01-openssh.txt
af854a3a-2127-422b-91ae-364da2661108http://lists.grok.org.uk/pipermail/full-disclosure/2003-April/004815.html
af854a3a-2127-422b-91ae-364da2661108http://marc.info/?l=bugtraq&m=105172058404810&w=2
af854a3a-2127-422b-91ae-364da2661108http://marc.info/?l=bugtraq&m=106018677302607&w=2
af854a3a-2127-422b-91ae-364da2661108http://www.redhat.com/support/errata/RHSA-2003-222.html

Data Freshness Timeline

(refreshed 10× in last 7d / 16× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-05-29 13:40 UTCepss_batch
2026-05-29 13:40 UTCepss_batch
2026-05-28 13:42 UTCepss_batch
2026-05-28 13:42 UTCepss_batch
2026-05-28 13:42 UTCepss_batch
2026-05-27 13:37 UTCepss_batch
2026-05-26 07:16 UTCepss_batch
2026-05-26 07:16 UTCepss_batch
2026-05-24 16:42 UTCepss_batch
2026-05-22 21:15 UTCepss_batch
2026-05-22 09:07 UTCOSV refresh
2026-05-20 22:36 UTCepss_batch
2026-05-20 11:20 UTCepss_batch
2026-05-20 11:20 UTCepss_batch
2026-05-18 21:29 UTCepss_batch
2026-05-18 21:29 UTCepss_batch

Publicly available exploits

(4 references)

Working exploit code is in the public domain (1 Metasploit module) (3 Exploit-DB entries). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

Exploit-DBEDB-3303✓ verified
First seen Feb 13, 2007
Portable OpenSSH 3.6.1p-PAM/4.1-SuSE - Timing Attack
Open source ↗
Exploit-DBEDB-26✓ verified
First seen May 2, 2003
OpenSSH/PAM 3.6.1p1 - 'gossh.sh' Remote Users Ident
Open source ↗
Exploit-DBEDB-25✓ verified
First seen Apr 30, 2003
OpenSSH/PAM 3.6.1p1 - Remote Users Discovery Tool
Open source ↗
Metasploitauxiliary/scanner/ssh/ssh_enumusers✓ verified
First seen Jan 1, 2003
SSH Username Enumeration
Open source ↗

Frequently asked(4)

What is CVE-2003-0190?

CVE-2003-0190 is a none vulnerability published on May 12, 2003. 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.

When was CVE-2003-0190 disclosed?

CVE-2003-0190 was first published in the National Vulnerability Database on May 12, 2003, with the most recent update on April 16, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2003-0190 actively exploited?

CVE-2003-0190 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 95.7% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

How do I remediate CVE-2003-0190?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2003-0190, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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CVE-2003-0190

📅 Published

🔄 Last Modified

🔗 References (20)