MEDIUMPOC
CVE-2003-0190
CWE-203Published: May 12, 2003· Updated: Jun 16, 2026
5.0
CVSS v3.1
Official 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.
Technical Analysis
CVE-2003-0190 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.
Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.
A proof-of-concept (PoC) exploit exists for CVE-2003-0190. While not yet confirmed in active campaigns, the availability of PoC code increases exploitation risk substantially.
CVSS v3.1 Vector Breakdown
Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.
User Interaction
Scope
Impact
ConfidentialityP
IntegrityNone
AvailabilityNone
AV:N/AC:L/Au:N/C:P/I:N/A:N
Affected Vendors & Products
Exploit & PoC Resources
POC AVAILABLEProof-of-concept code exists
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.
Official Patches & Advisories
All References (20)
→
http://marc.info/?l=bugtraq&m=105172058404810&w=2Third Party Advisory
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http://marc.info/?l=bugtraq&m=106018677302607&w=2Third Party Advisory
→
http://www.securityfocus.com/bid/7467Broken Link · Exploit · Patch · Third Party Advisory · VDB Entry · Vendor Advisory
→
https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdfThird Party Advisory
→
→
http://marc.info/?l=bugtraq&m=105172058404810&w=2Third Party Advisory
→
http://marc.info/?l=bugtraq&m=106018677302607&w=2Third Party Advisory
Quick Facts
CVE IDCVE-2003-0190
CVSS Score5.0 / 10
SeverityMEDIUM
WeaknessCWE-203
CISA KEVNo
ExploitPOC
Affected3 vendor(s)
PublishedMay 12, 2003
Related CVEs (CWE-203)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2003-0190 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.