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
Published Feb 20, 2005
6.4
MEDIUMCVSS 2.0
EPSS 11.57%
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.
Affected products
Remediation
Red Hat statement
Permitting TCP forwarding is the expected and known default configuration. If it is not desired, it can disabled using the AllowTcpForwarding option in the /etc/ssh/sshd_config configuration file. However, only disabling TCP forwarding does not improve security unless users are also denied shell access. For more information, see man sshd_config.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
No CVSS v3.0 score for this CVE.
AV:N/AC:L/Au:N/C:P/I:P/A:N
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (10 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 11.57% (0.11574) | 95.91th | v5 (v2026.06.15) |
| Jun 15, 2026 | 11.57% (0.11574) | 95.47th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.38% (0.00375) | 57.06th | v4 (v2025.03.14) |
| Dec 12, 2024 | 1.04% (0.01041) | 84.62th | v3 (v2023.03.01) |
| Jan 28, 2024 | 1.04% (0.01041) | 82.38th | v3 (v2023.03.01) |
| Mar 7, 2023 | 1.32% (0.01324) | 83.89th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.21% (0.01213) | 66.61th | v2 (v2022.01.01) |
| Feb 17, 2023 | 1.21% (0.01213) | 66.22th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.21% (0.01213) | 64.21th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.21% (0.01213) | 40.54th | v2 (v2022.01.01) |
No CWE recorded.
References (8)
- http://marc.info/?l=bugtraq&m=109413637313484&w=2 mailing-listx_refsource_BUGTRAQ
- http://securitytracker.com/id?1011143 vdb-entryx_refsource_SECTRACK
- http://www.osvdb.org/9562 vdb-entryx_refsource_OSVDB
- https://access.redhat.com/security/cve/CVE-2004-1653 Vendor Advisory
- https://exchange.xforce.ibmcloud.com/vulnerabilities/17213 vdb-entryx_refsource_XF
- https://nvd.nist.gov/vuln/detail/CVE-2004-1653
- https://security.netapp.com/advisory/ntap-20191107-0001/ x_refsource_CONFIRM
- https://www.cve.org/CVERecord?id=CVE-2004-1653
| Link | Providers | Tags |
|---|---|---|
| http://marc.info/?l=bugtraq&m=109413637313484&w=2 | mailing-listx_refsource_BUGTRAQ | |
| http://securitytracker.com/id?1011143 | vdb-entryx_refsource_SECTRACK | |
| http://www.osvdb.org/9562 | vdb-entryx_refsource_OSVDB | |
| https://access.redhat.com/security/cve/CVE-2004-1653 | Vendor Advisory | |
| https://exchange.xforce.ibmcloud.com/vulnerabilities/17213 | vdb-entryx_refsource_XF | |
| https://nvd.nist.gov/vuln/detail/CVE-2004-1653 | ||
| https://security.netapp.com/advisory/ntap-20191107-0001/ | x_refsource_CONFIRM | |
| https://www.cve.org/CVERecord?id=CVE-2004-1653 |
Change history (0)
No recorded changes yet.