CVE-2003-0190

Exp

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.

Published: 2003-05-12 Last update: 2026-04-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2003-0190 is rated High Exploit Risk (66.4/100): CVSS Medium severity, with high exploitation likelihood (EPSS 20.58%, 96th percentile). 4 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2003-0190

EDB-ID Source Kind Published Link
3303 exploit_db edb 2007-02-13 Exploit-DB ↗
26 exploit_db edb 2003-05-02 Exploit-DB ↗
25 exploit_db edb 2003-04-30 Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2003-0190

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-04-21 22.65% 20.58% -2.07%
2 2026-03-14 17.16% 22.65% +5.49%
3 2026-02-05 — 17.16% —

Full EPSS history (28 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2003-0190

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.0 2.0 MEDIUM
AV:N/AC:L/Au:N/C:P/I:N/A:N Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:N)
No availability impact.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-2003-0190

OS Trackers for CVE-2003-0190

vendor priority summary link
debian not yet assigned CVE-2003-0190 not yet assigned priority: Debian including 1 source packages (openssh), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2003-0190
redhat low — https://access.redhat.com/security/cve/CVE-2003-0190
ubuntu medium CVE-2003-0190 medium priority: Ubuntu including 1 source packages (openssh), 4 status rows across 4 suites (dapper, edgy, feisty, upstream): released 3, needs-triage 1. https://ubuntu.com/security/CVE-2003-0190

Affected software / configurations for CVE-2003-0190

Vendor Product Version Raw CPE
openbsd openssh < 3.6.1 cpe:2.3:a:openbsd:openssh:*:*:*:*:*:*:*:*
openbsd openssh 3.6.1 cpe:2.3:a:openbsd:openssh:3.6.1:p1:*:*:*:*:*:*
openpkg openpkg 1.2 cpe:2.3:a:openpkg:openpkg:1.2:*:*:*:*:*:*:*
openpkg openpkg 1.3 cpe:2.3:a:openpkg:openpkg:1.3:*:*:*:*:*:*:*
siemens scalance_x204rna_ecc_firmware < 3.2.7 cpe:2.3:o:siemens:scalance_x204rna_ecc_firmware:*:*:*:*:*:*:*:*
siemens scalance_x204rna_firmware < 3.2.7 cpe:2.3:o:siemens:scalance_x204rna_firmware:*:*:*:*:*:*:*:*

References for CVE-2003-0190

URL Tags
http://lab.mediaservice.net/advisory/2003-01-openssh.txt Broken Link
http://lists.grok.org.uk/pipermail/full-disclosure/2003-April/004815.html Broken Link
http://marc.info/?l=bugtraq&m=105172058404810&w=2 Third Party Advisory
http://marc.info/?l=bugtraq&m=106018677302607&w=2 Third Party Advisory
http://www.redhat.com/support/errata/RHSA-2003-222.html Broken Link
http://www.redhat.com/support/errata/RHSA-2003-224.html Broken Link
http://www.securityfocus.com/bid/7467 Broken Link Exploit Patch Third Party Advisory VDB Entry Vendor Advisory
http://www.turbolinux.com/security/TLSA-2003-31.txt Broken Link
https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf Third Party Advisory
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A445 Broken Link
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