CVE-2009-0362

2022-10-0316:24:09

Debian Security Bug Tracker

security-tracker.debian.org

fail2ban

filter.d/wuftpd.conf

vulnerability

denial of service

remote attackers

forced authentication

dns name

ip address

cve-2009-0362

6.8 Medium

CVSS2

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

AV:N/AC:M/Au:N/C:P/I:P/A:P

0.19 Low

EPSS

Percentile

96.3%

JSON

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.

OSVersionArchitecturePackageVersionFilename
Debian12allfail2ban< 0.8.3-2sid1fail2ban_0.8.3-2sid1_all.deb
Debian11allfail2ban< 0.8.3-2sid1fail2ban_0.8.3-2sid1_all.deb
Debian999allfail2ban< 0.8.3-2sid1fail2ban_0.8.3-2sid1_all.deb
Debian13allfail2ban< 0.8.3-2sid1fail2ban_0.8.3-2sid1_all.deb

OS	Version	Architecture	Package	Version	Filename
Debian	12	all	fail2ban	< 0.8.3-2sid1	fail2ban_0.8.3-2sid1_all.deb
Debian	11	all	fail2ban	< 0.8.3-2sid1	fail2ban_0.8.3-2sid1_all.deb
Debian	999	all	fail2ban	< 0.8.3-2sid1	fail2ban_0.8.3-2sid1_all.deb
Debian	13	all	fail2ban	< 0.8.3-2sid1	fail2ban_0.8.3-2sid1_all.deb