CVE-2007-4323

Severity: medium (CVSS 6.8 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2007-08-14 · updated 2026-06-16

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.

Affected products

Denyhosts: 2.6

References

http://bugs.gentoo.org/show_bug.cgi?id=181213
http://osvdb.org/42482
http://secunia.com/advisories/27254
http://security.gentoo.org/glsa/glsa-200710-14.xml
http://www.ossec.net/en/attacking-loganalysis.html
http://www.securityfocus.com/bid/26061
https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=244943
https://exchange.xforce.ibmcloud.com/vulnerabilities/37199
http://bugs.gentoo.org/show_bug.cgi?id=181213
http://osvdb.org/42482
http://secunia.com/advisories/27254
http://security.gentoo.org/glsa/glsa-200710-14.xml

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