What’s Vulnerable › Vulnerabilities

CVE-2006-6302

• Severity: medium (CVSS 5.0 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2006-12-06 · updated 2026-06-16

Description

fail2ban 0.7.4 and earlier 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.

Affected products

• fail2ban: through 0.7.4

References

• http://bugs.gentoo.org/show_bug.cgi?id=157166
• http://secunia.com/advisories/23237
• http://secunia.com/advisories/24184
• http://security.gentoo.org/glsa/glsa-200702-05.xml
• http://www.securityfocus.com/bid/21469
• http://www.vupen.com/english/advisories/2006/4877
• https://exchange.xforce.ibmcloud.com/vulnerabilities/30739
• http://bugs.gentoo.org/show_bug.cgi?id=157166
• http://secunia.com/advisories/23237
• http://secunia.com/advisories/24184
• http://security.gentoo.org/glsa/glsa-200702-05.xml
• http://www.securityfocus.com/bid/21469

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