Denyhosts is a focused host-based intrusion-prevention utility that monitors SSH logs to identify and block repeated failed authentication attempts, serving as a defensive layer against brute-force attacks. The tool's limited disclosure footprint centers on the core Denyhosts product itself, with observed issues in the broader category of implementation and configuration concerns rather than a specific recurring weakness class. Current severity, exploitation activity, and exposure counts are shown alongside this summary.
The number and severity of CVEs published that impact products developed by Denyhosts over time
Signals from CVEs in this vendor scope (3 CVEs).
3 CVEs · Highest risk first
| CVE | Published | CVSS | Risk | KEV | Exploit |
|---|---|---|---|---|---|
CVE-2007-4323MEDIUM 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 arbit | Aug 14, 2007 | 6.8 | 18 | NO | NO |
CVE-2007-5715MEDIUM DenyHosts 2.6 processes OpenSSH sshd "not listed in AllowUsers" log messages with an incorrect regular expression that does not match an IP address, which might allow remote attack | Oct 30, 2007 | 4.3 | 15 | NO | NO |
CVE-2006-6301MEDIUM 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 arbit | Dec 6, 2006 | 5.0 | 15 | NO | NO |
Signals from CVEs in this vendor scope (3 CVEs).
An overview of all social media posts that mention a CVE ID that affects a product developed by Denyhosts.
Media articles that mention a CVE ID that affects a product developed by Denyhosts — matched by CVE ID, not by vendor name.