Home/CVE/OpenSSH-portable (OpenSSH) 3.6.1p1 and earlier with PAM support enabled immediately sends an error message when a user d
CVE

CVE-2003-0190

OpenSSH-portable (OpenSSH) 3.6.1p1 and earlier with PAM support enabled immediately sends an error message when a user d

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.

MEDIUM · CVSS 5 EPSS 0.20579
Schedule remediation
  • EPSS ≥ 0.10 - elevated exploitation probability
  • EPSS percentile: top 4% of all CVEs by exploitation likelihood
  • Public exploit or PoC is available
Sigma rules2 YARA rules0
⬡

Weakness Classification

CWE-203Observable Discrepancy
▤

Affected Products & Versions

5
openbsd openssh< 3.6.1
openbsd opensshall versions
openpkgall versions
siemens scalance x204rna ecc firmware< 3.2.7
siemens scalance x204rna firmware< 3.2.7
⚠

Public Exploits & PoCs

4
remotePortable OpenSSH 3.6.1p-PAM/4.1-SuSE - Timing Attackverified
remoteOpenSSH/PAM 3.6.1p1 - 'gossh.sh' Remote Users Identverified
remoteOpenSSH/PAM 3.6.1p1 - Remote Users Discovery Toolverified
pocwww.securityfocus.com · 7467www.securityfocus.com
◈

Sigma Hunt Rules

2
Exact rules name this CVE ID. Product rules name an affected product in their title. Related rules cover techniques used by actors who exploited this CVE. Showing the most relevant matches; the complete related set is on the full drill-down.
productmediumSuspicious OpenSSH Daemon Error
productmediumOpenSSH Server Listening On Socket
▣

Scoring & Timeline

5
MEDIUM · CVSS v2 (legacy) · cve@mitre.org
View on NVD
This CVE predates CVSS v3; the legacy v2 score is shown so triage still has a severity to work with.
v2 Vector
AV:N/AC:L/Au:N/C:P/I:N/A:N
Published to NVD12 May 2003 · 04:00 AM
⚑

Vendor Advisories

5
siemens-csafSSA-412672
usnUSN-34-1
rhsaRHSA-2003:224Low
rhsaRHSA-2003:222Low
cisa-csafcisa-csaf-csaf_files-OT-white-2022-icsa-22-349-21
🔗

References & Sources

9
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
http://lab.mediaservice.net/advisory/2003-01-openssh.txtBroken Link
http://lists.grok.org.uk/pipermail/full-disclosure/2003-April/004815.htmlBroken Link
http://marc.info/?l=bugtraq&m=105172058404810&w=2Third Party Advisory
http://marc.info/?l=bugtraq&m=106018677302607&w=2Third Party Advisory
http://www.redhat.com/support/errata/RHSA-2003-222.htmlBroken Link
http://www.redhat.com/support/errata/RHSA-2003-224.htmlBroken Link
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