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CVE-2006-6301
DenyHosts 2.5 does not properly parse sshd log files, which allows remote attackers to add arbitrary hosts to the /etc/hosts.deny file and…
Medium5.0EPSS 1.9%
- Published
- Updated
- Reserved
- Assigned by
- mitre
Description
DenyHosts 2.5 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 login name containing certain strings with an IP address, which is not properly handled by a regular expression.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 2.0 | Medium5.0 | AV:N/AC:L/Au:N/C:N/I:N/A:P |
- EPSS (exploitation in 30 days)
- 1.9% · top 20% of all CVEs (4 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.0.
Weakness
- n/a
Affected products
n/a
- affected n/a
References (7)
- http://bugs.gentoo.org/show_bug.cgi?id=157163 (opens in a new tab)x_refsource_CONFIRMx_transferred
- ADV-2006-4876 (opens in a new tab)vdb-entryx_refsource_VUPENx_transferred
- 23236 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- denyhosts-log-files-dos(30761) (opens in a new tab)vdb-entryx_refsource_XFx_transferred
- 21468 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
- 23603 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- GLSA-200701-01 (opens in a new tab)vendor-advisoryx_refsource_GENTOOx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
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[](https://trackcve.app/cve/CVE-2006-6301)Record last updated .