CVE-2006-6301

Name: CVE-2006-6301
Creator: NVD / NIST
Published: 2006-12-06T19:28:00+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 1.81%

Last modified Jun 16, 2026

CVE-2006-6301 is a vulnerability of currently unknown severity. 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.. EPSS estimates a 1.81% chance of exploitation in the next 30 days.

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.

Metrics

EPSS Probability

1.81%

75.9th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Denyhosts	Denyhosts	2.5

References

Timeline

Published: Dec 6, 2006
Last Modified: Jun 16, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2006-6301?

How severe is CVE-2006-6301?

Severity scoring for CVE-2006-6301 is pending analysis. The EPSS model estimates a 1.81% probability of exploitation in the next 30 days.

How do I fix CVE-2006-6301?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2006-6301?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST