Fail2ban 0.8 - Remote Denial of Service
| Reporter | Title | Published | Views | Family All 17 |
|---|---|---|---|---|
 | CVE-2007-4321 | 14 Aug 200700:00 | – | cve |
 | CVE-2007-4321 | 14 Aug 200700:00 | – | cvelist |
 | [SECURITY] [DSA 1456-1] New fail2ban packages fix denial of service | 9 Jan 200822:02 | – | debian |
 | CVE-2007-4321 | 14 Aug 200700:00 | – | debiancve |
 | Debian DSA-1456-1 : fail2ban - programming error | 10 Jan 200800:00 | – | nessus |
| GLSA-200707-13 : Fail2ban: Denial of Service | 30 Jul 200700:00 | – | nessus |
 | Fail2ban: Denial of service | 28 Jul 200700:00 | – | gentoo |
 | CVE-2007-4321 | 14 Aug 200700:17 | – | nvd |
 | Gentoo Security Advisory GLSA 200707-13 (fail2ban) | 24 Sep 200800:00 | – | openvas |
| Debian: Security Advisory (DSA-1456-1) | 31 Jan 200800:00 | – | openvas |
10
source: https://www.securityfocus.com/bid/25117/info
Fail2ban is prone to a remote denial-of-service vulnerability because the application fails to properly ensure the validity of authentication-failure messages.
Successfully exploiting this issue allows remote attackers to add arbitrary IP addresses to the block list used by the application. This allows attackers to deny further network access to arbitrary IP addresses, denying service to legitimate users.
Fail2ban 0.8.0 and prior versions are vulnerable to this issue.
This issue may be demonstrated by connecting to an SSH server with 'nc', and sending the following string:
ROOT LOGIN REFUSED hi FROM 1.2.3.4
where '1.2.3.4' is an IP address to be blocked.Data
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23 Dec 2013 00:00Current
5.8Medium risk
Vulners AI Score5.8
CVSS 26.8
EPSS0.05748