Vulnerabilities > Fail2Ban

DATE CVE VULNERABILITY TITLE RISK
2021-07-16 CVE-2021-32749 Code Injection vulnerability in multiple products
fail2ban is a daemon to ban hosts that cause multiple authentication errors.
network
high complexity
fail2ban fedoraproject CWE-94
8.1
2014-06-10 CVE-2009-5023 Link Following vulnerability in Fail2Ban
The (1) dshield.conf, (2) mail-buffered.conf, (3) mynetwatchman.conf, and (4) mynetwatchman.conf actions in action.d/ in Fail2ban before 0.8.5 allows local users to write to arbitrary files via a symlink attack on temporary files with predictable names, as demonstrated by /tmp/fail2ban-mail.txt.
4.7
2014-02-01 CVE-2013-7177 Improper Input Validation vulnerability in Fail2Ban
config/filter.d/cyrus-imap.conf in the cyrus-imap filter in Fail2ban before 0.8.11 allows remote attackers to trigger the blocking of an arbitrary IP address via a crafted e-mail address that matches an improperly designed regular expression.
network
low complexity
fail2ban CWE-20
5.0
2014-02-01 CVE-2013-7176 Improper Input Validation vulnerability in Fail2Ban
config/filter.d/postfix.conf in the postfix filter in Fail2ban before 0.8.11 allows remote attackers to trigger the blocking of an arbitrary IP address via a crafted e-mail address that matches an improperly designed regular expression.
network
low complexity
fail2ban CWE-20
5.0
2013-08-28 CVE-2013-2178 Improper Input Validation vulnerability in Fail2Ban
The apache-auth.conf, apache-nohome.conf, apache-noscript.conf, and apache-overflows.conf files in Fail2ban before 0.8.10 do not properly validate log messages, which allows remote attackers to block arbitrary IP addresses via certain messages in a request.
network
low complexity
fail2ban CWE-20
5.0
2012-12-31 CVE-2012-5642 Arbitrary Log Content Injection vulnerability in Fail2ban
server/action.py in Fail2ban before 0.8.8 does not properly handle the content of the matches tag, which might allow remote attackers to trigger unsafe behavior in a custom action file via unspecified symbols in this content.
network
low complexity
fail2ban
7.5
2009-02-13 CVE-2009-0362 Improper Authentication vulnerability in Fail2Ban 0.8.3
filter.d/wuftpd.conf in Fail2ban 0.8.3 uses an incorrect regular expression that allows remote attackers to cause a denial of service (forced authentication failures) via a crafted reverse-resolved DNS name (rhost) entry that contains a substring that is interpreted as an IP address, a different vulnerability than CVE-2007-4321.
network
low complexity
fail2ban CWE-287
4.0
2007-08-14 CVE-2007-4321 Remote Denial of Service vulnerability in Fail2Ban 0.8
fail2ban 0.8 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 client protocol version identification containing an IP address string, a different vector than CVE-2006-6302.
network
fail2ban
6.8
2006-12-06 CVE-2006-6302 Remote Denial of Service vulnerability in Fail2Ban
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.
network
low complexity
fail2ban
5.0