How severe is CVE-2004-1653?

CVE-2004-1653 has a CVSS 2.0 base score of 6.4, rated medium severity.

Is CVE-2004-1653 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 12% (96th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2004-1653?

CVE-2004-1653 affects Openbsd Openssh. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2004-1653?

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

When was CVE-2004-1653 published?

CVE-2004-1653 was published on 2004-08-31 and last updated on 2026-06-16.

CVE-2004-1653

CVE-2004-1653 is a medium-severity vulnerability in Openbsd Openssh with a CVSS 2.0 base score of 6.4. Its EPSS exploit-prediction score of 12% places it in the 96th percentile, indicating an elevated likelihood of exploitation.

Key facts

Severity: Medium (CVSS 2.0 base score 6.4)
EPSS exploit prediction: 12% (96th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Openbsd Openssh
Published: 2004-08-31
Last modified: 2026-06-16

Description

The default configuration for OpenSSH enables AllowTcpForwarding, which could allow remote authenticated users to perform a port bounce, when configured with an anonymous access program such as AnonCVS.

Frequently asked questions

What is CVE-2004-1653?: The default configuration for OpenSSH enables AllowTcpForwarding, which could allow remote authenticated users to perform a port bounce, when configured with an anonymous access program such as AnonCVS.
How severe is CVE-2004-1653?: CVE-2004-1653 has a CVSS 2.0 base score of 6.4, rated medium severity.
Is CVE-2004-1653 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 12% (96th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2004-1653?: CVE-2004-1653 affects Openbsd Openssh. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2004-1653?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2004-1653 published?: CVE-2004-1653 was published on 2004-08-31 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:a:openbsd:openssh:*:*:*:*:*:*:*:*

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…

All CVEs affecting Openbsd Openssh →

Threat intelligence

Threat-intel indicators referencing this CVE:

112.31.93.229 (ipv4-addr)
61.191.145.123 (ipv4-addr)
14.243.169.55 (ipv4-addr)
112.31.167.120 (ipv4-addr)