CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:N/I:N/A:P
EPSS
Percentile
92.7%
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.
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
Debian | 12 | all | fail2ban | < 1.0.2-2 | fail2ban_1.0.2-2_all.deb |
Debian | 11 | all | fail2ban | < 0.11.2-2 | fail2ban_0.11.2-2_all.deb |
Debian | 999 | all | fail2ban | < 1.1.0-7 | fail2ban_1.1.0-7_all.deb |
Debian | 13 | all | fail2ban | < 1.1.0-7 | fail2ban_1.1.0-7_all.deb |