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.
Published: 2006-12-06
Score: 5.0 Medium
EPSS: 1.5% Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories
Source ID Title
EUVD EUVD EUVD-2006-6284 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.
History

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Subscriptions

Denyhosts Denyhosts
cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2024-08-07T20:19:35.199Z

Reserved: 2006-12-05T00:00:00.000Z

Link: CVE-2006-6301

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2006-12-06T19:28:00.000

Modified: 2026-04-23T00:35:47.467

Link: CVE-2006-6301

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses