Vulnerability Name:

CVE-2009-0362 (CCN-48673)

Assigned:2009-02-04
Published:2009-02-04
Updated:2009-02-13
Summary: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.
CVSS v3 Severity:5.3 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Low
CVSS v2 Severity:4.0 Medium (CVSS v2 Vector: AV:N/AC:L/Au:S/C:N/I:N/A:P)
3.0 Low (Temporal CVSS v2 Vector: AV:N/AC:L/Au:S/C:N/I:N/A:P/E:U/RL:OF/RC:C)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Authentication (Au): Single_Instance
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Partial
5.0 Medium (CCN CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P)
3.7 Low (CCN Temporal CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P/E:U/RL:OF/RC:C)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Athentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Partial
Vulnerability Type:CWE-287
Vulnerability Consequences:Denial of Service
References:Source: CCN
Type: Debian Bug report logs - #514163
fail2ban: allows DoS via construction of domain names starting with IP of a victim

Source: CONFIRM
Type: Exploit
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=514163

Source: MITRE
Type: CNA
CVE-2009-0362

Source: CCN
Type: SA33890
Fail2ban "wuftpd.conf" Denial of Service Vulnerability

Source: SECUNIA
Type: Vendor Advisory
33890

Source: CCN
Type: Fail2ban Web site
Fail2ban

Source: BID
Type: UNKNOWN
33734

Source: CCN
Type: BID-33734
Fail2ban 'wuftpd.conf' Remote Denial of Service Vulnerability

Source: XF
Type: UNKNOWN
fail2ban-wuftpd-dos(48673)

Vulnerable Configuration:Configuration 1:
  • cpe:/a:fail2ban:fail2ban:0.8.3:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    BACK
    fail2ban fail2ban 0.8.3