CVE-2006-6301: n/a vulnerability

CVE-2006-6301: DenyHosts 2.5 does not properly parse sshd log files, which allows remote attackers to add arbitrary hosts...

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.

UnknownCVSS not scoredNot KEV-listedUpdatedAug 7, 2024, 20:19 UTC (UTC+00:00)

Security readout for executives and security teams

DenyHosts 2.5 could be tricked into blocking arbitrary IP addresses. An attacker interacting with SSH could cause chosen addresses to be added to /etc/hosts.deny, potentially locking out administrators, users, or dependent systems. Exposure is limited to systems running DenyHosts 2.5 where it parses sshd logs and enforces blocking through /etc/hosts.deny. Internet-facing SSH services are the most relevant targets. Treat as a targeted availability risk for legacy SSH-facing infrastructure. Prioritize if administrative access depends on hosts still running DenyHosts 2.5. Mitigation focus: Inventory systems for DenyHosts 2.5 usage.; Apply vendor-supported updates or documented distribution guidance.; Review /etc/hosts.deny for unexpected or business-critical IP blocks..

Prepared: Jun 29, 2026, 08:58 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: Dec 6, 2006, 19:00 UTC (UTC+00:00)

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors

0Timeline events

0ADP providers

2Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

CVE List V5 sourceCVE List V5
denyhosts-log-files-dos(30761)CVE reference · vdb-entry, x_refsource_XF

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

n/an/an/aListed

Weakness

CWE details

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