fail2ban 0.8 and earlier does not properly parse sshd log files, which allows remote attackers to add arbitrary hosts to the /etc/hosts.deny file and cause a denial of service by adding arbitrary IP addresses to the sshd log file, as demonstrated by logging in via ssh with a client protocol version identification containing an IP address string, a different vector than CVE-2006-6302
Published Aug 14, 2007
6.8
MEDIUMCVSS 2.0
EPSS 5.75%
Description
fail2ban 0.8 and earlier does not properly parse sshd log files, which allows remote attackers to add arbitrary hosts to the /etc/hosts.deny file and cause a denial of service by adding arbitrary IP addresses to the sshd log file, as demonstrated by logging in via ssh with a client protocol version identification containing an IP address string, a different vector than CVE-2006-6302.
Affected products
Remediation
No remediation recorded yet.
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:M/Au:N/C:P/I:P/A:P
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 (17 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 5.75% (0.05748) | 92.83th | v5 (v2026.06.15) |
| Jun 15, 2026 | 5.75% (0.05748) | 92.06th | v5 (v2026.06.15) |
| Mar 30, 2025 | 11.82% (0.11824) | 93.08th | v4 (v2025.03.14) |
| Mar 29, 2025 | 16.33% (0.16327) | 91.46th | v4 (v2025.03.14) |
| Mar 17, 2025 | 11.82% (0.11824) | 93.16th | v4 (v2025.03.14) |
| Dec 12, 2024 | 17.96% (0.17957) | 96.35th | v3 (v2023.03.01) |
| Oct 9, 2024 | 17.96% (0.17957) | 96.26th | v3 (v2023.03.01) |
| Jun 17, 2024 | 18.98% (0.18980) | 96.28th | v3 (v2023.03.01) |
| May 10, 2024 | 21.16% (0.21164) | 96.39th | v3 (v2023.03.01) |
| Jan 15, 2024 | 21.71% (0.21712) | 96.01th | v3 (v2023.03.01) |
| Jul 14, 2023 | 27.27% (0.27265) | 96.17th | v3 (v2023.03.01) |
| May 4, 2023 | 33.81% (0.33810) | 96.43th | v3 (v2023.03.01) |
| Mar 29, 2023 | 58.13% (0.58134) | 97.16th | v3 (v2023.03.01) |
| Mar 7, 2023 | 60.27% (0.60275) | 97.16th | v3 (v2023.03.01) |
| Mar 6, 2023 | 7.20% (0.07197) | 92.42th | v2 (v2022.01.01) |
| Apr 1, 2022 | 7.20% (0.07197) | 91.69th | v2 (v2022.01.01) |
| Feb 4, 2022 | 7.20% (0.07197) | 80.47th | v2 (v2022.01.01) |
No CWE recorded.
References (8)
- http://bugs.gentoo.org/show_bug.cgi?id=181214 x_refsource_MISC
- http://osvdb.org/42484 vdb-entryx_refsource_OSVDB
- http://secunia.com/advisories/23237 third-party-advisoryx_refsource_SECUNIA
- http://secunia.com/advisories/28374 third-party-advisoryx_refsource_SECUNIA
- http://security.gentoo.org/glsa/glsa-200707-13.xml vendor-advisoryx_refsource_GENTOO
- http://www.debian.org/security/2008/dsa-1456 vendor-advisoryx_refsource_DEBIAN
- http://www.ossec.net/en/attacking-loganalysis.html x_refsource_MISC
- http://www.securityfocus.com/bid/25117 vdb-entryx_refsource_BID
| Link | Providers | Tags |
|---|---|---|
| http://bugs.gentoo.org/show_bug.cgi?id=181214 | x_refsource_MISC | |
| http://osvdb.org/42484 | vdb-entryx_refsource_OSVDB | |
| http://secunia.com/advisories/23237 | third-party-advisoryx_refsource_SECUNIA | |
| http://secunia.com/advisories/28374 | third-party-advisoryx_refsource_SECUNIA | |
| http://security.gentoo.org/glsa/glsa-200707-13.xml | vendor-advisoryx_refsource_GENTOO | |
| http://www.debian.org/security/2008/dsa-1456 | vendor-advisoryx_refsource_DEBIAN | |
| http://www.ossec.net/en/attacking-loganalysis.html | x_refsource_MISC | |
| http://www.securityfocus.com/bid/25117 | vdb-entryx_refsource_BID |
Change history (0)
No recorded changes yet.