DenyHosts 2.6 does not properly parse sshd log files, which allows remote attackers to add arbitrary hosts to the /etc/hosts.deny file and…

Description

DenyHosts 2.6 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-2006-6301.

Scores

EPSS (exploitation in 30 days)

1.5% · top 26% of all CVEs (5 Nov 2026)

The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.8.

Weakness

• n/a

Affected products

• n/a

  • affected n/a

References (8)

• 42482 (opens in a new tab)vdb-entryx_refsource_OSVDBx_transferred
• denyhosts-sshd-logfiles-dos(37199) (opens in a new tab)vdb-entryx_refsource_XFx_transferred
• https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=244943 (opens in a new tab)x_refsource_CONFIRMx_transferred
• http://www.ossec.net/en/attacking-loganalysis.html (opens in a new tab)x_refsource_MISCx_transferred
• 26061 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
• http://bugs.gentoo.org/show_bug.cgi?id=181213 (opens in a new tab)x_refsource_CONFIRMx_transferred
• 27254 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
• GLSA-200710-14 (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)

Badge for a README or a ticket

[![CVE-2007-4323](https://trackcve.app/badge/CVE-2007-4323.svg)](https://trackcve.app/cve/CVE-2007-4323)

Record last updated 7 Aug 2024, 14:53 UTC.