How severe is CVE-2003-0190?

CVE-2003-0190 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-2003-0190 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 77% (99th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2003-0190?

CVE-2003-0190 primarily affects Openbsd Openssh. In total, 6 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2003-0190?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2003-0190 published?

CVE-2003-0190 was published on 2003-05-12 and last updated on 2026-06-16.

CVE-2003-0190

CVE-2003-0190 is a medium-severity vulnerability in Openbsd Openssh with a CVSS 2.0 base score of 5.0. Its EPSS exploit-prediction score of 77% places it in the 99th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-203.

Key facts

Severity: Medium (CVSS 2.0 base score 5.0)
EPSS exploit prediction: 77% (99th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-203
Affected product: Openbsd Openssh
Published: 2003-05-12
Last modified: 2026-06-16

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.

Frequently asked questions

What is CVE-2003-0190?: 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 severe is CVE-2003-0190?: CVE-2003-0190 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-2003-0190 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 77% (99th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2003-0190?: CVE-2003-0190 primarily affects Openbsd Openssh. In total, 6 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2003-0190?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2003-0190 published?: CVE-2003-0190 was published on 2003-05-12 and last updated on 2026-06-16.

References

Affected products (6)

cpe:2.3:a:openbsd:openssh:*:*:*:*:*:*:*:*
cpe:2.3:a:openbsd:openssh:3.6.1:p1:*:*:*:*:*:*
cpe:2.3:a:openpkg:openpkg:1.2:*:*:*:*:*:*:*
cpe:2.3:a:openpkg:openpkg:1.3:*:*:*:*:*:*:*
cpe:2.3:o:siemens:scalance_x204rna_ecc_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:scalance_x204rna_firmware:*:*:*:*:*:*:*:*

More vulnerabilities in Openbsd Openssh

CVE-2003-0786 — Critical (CVSS 10.0): The SSH1 PAM challenge response authentication in OpenSSH 3.7.1 and 3.7.1p1, when Privilege Separation is disabled,…
CVE-2003-0693 — Critical (CVSS 10.0): A "buffer management error" in buffer_append_space of buffer.c for OpenSSH before 3.7 may allow remote attackers to…
CVE-2002-0640 — Critical (CVSS 10.0): Buffer overflow in sshd in OpenSSH 2.3.1 through 3.3 may allow remote attackers to execute arbitrary code via a large…
CVE-2001-0144 — Critical (CVSS 10.0): CORE SDI SSH1 CRC-32 compensation attack detector allows remote attackers to execute arbitrary commands on an SSH…
CVE-2000-0999 — Critical (CVSS 10.0): Format string vulnerabilities in OpenBSD ssh program (and possibly other BSD-based operating systems) allow attackers…
CVE-2000-0525 — Critical (CVSS 10.0): OpenSSH does not properly drop privileges when the UseLogin option is enabled, which allows local users to execute…

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