{"id":"CVE-2007-4323","aliases":["EUVD-2007-4306","GHSA-wch6-64mr-vfpg"],"status":"published","title":"DenyHosts 2.6 does not properly parse sshd log files, which allows remote attackers to add...","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.","severity":{"version":"2.0","score":6.8,"vector":"AV:N/AC:M/Au:N/C:P/I:P/A:P","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-07","score":0.01481,"percentile":0.74102,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"published":"2007-08-14T00:00:00Z","modified":"2026-06-16T22:43:48Z","products":[{"vendor":"denyhosts","product":"denyhosts"}],"references":[{"url":"http://osvdb.org/42482","tags":["vdb-entry","x_refsource_OSVDB","x_transferred"]},{"url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/37199","tags":["vdb-entry","x_refsource_XF","x_transferred"]},{"url":"https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=244943","tags":["x_refsource_CONFIRM","x_transferred"]},{"url":"http://www.ossec.net/en/attacking-loganalysis.html","tags":["x_refsource_MISC","x_transferred"]},{"url":"http://www.securityfocus.com/bid/26061","tags":["vdb-entry","x_refsource_BID","x_transferred"]},{"url":"http://bugs.gentoo.org/show_bug.cgi?id=181213","tags":["x_refsource_CONFIRM","x_transferred"]},{"url":"http://secunia.com/advisories/27254","tags":["third-party-advisory","x_refsource_SECUNIA","x_transferred"]},{"url":"http://security.gentoo.org/glsa/glsa-200710-14.xml","tags":["vendor-advisory","x_refsource_GENTOO","x_transferred"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2007-4323"},{"url":"https://github.com/advisories/GHSA-wch6-64mr-vfpg"}],"sources":{"cve":[{"id":"CVE-2007-4323","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.","status":"published","published":"2007-08-14T00:00:00Z","modified":"2024-08-07T14:53:55.416Z","updated_at":"2026-11-02T13:33:30.262137Z"}],"euvd":[{"id":"EUVD-2007-4306","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.","status":"published","published":"2007-08-14T00:00:00Z","modified":"2024-08-07T14:53:55Z","updated_at":"2026-11-03T01:16:22.0225Z"}],"ghsa":[{"id":"GHSA-wch6-64mr-vfpg","title":"DenyHosts 2.6 does not properly parse sshd log files, which allows remote attackers to add...","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.","status":"published","published":"2022-05-01T18:22:33Z","modified":"2023-01-31T05:04:55Z","updated_at":"2026-11-02T14:48:45.334022Z"}],"nvd":[{"id":"CVE-2007-4323","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.","status":"published","published":"2007-08-14T00:17:00Z","modified":"2026-06-16T22:43:48.753Z","cvss":[{"version":"2.0","score":6.8,"vector":"AV:N/AC:M/Au:N/C:P/I:P/A:P","level":"medium","assessor":"primary"}],"updated_at":"2026-11-02T14:01:19.102336Z"}]}}