Detections
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GLSA-200707-13 : Fail2ban: Denial of Service

medium Nessus Plugin ID 25809

Synopsis

The remote Gentoo host is missing one or more security-related patches.

Description

The remote host is affected by the vulnerability described in GLSA-200707-13 (Fail2ban: Denial of Service)

 A vulnerability has been discovered in Fail2ban when parsing log files.
 Impact :

 A remote attacker could send specially crafted SSH login banners to the vulnerable host, which would prevent any ssh connection to the host and result in a Denial of Service.
 Workaround :

 There is no known workaround at this time.

Solution

All Fail2ban users should upgrade to the latest version:
 # emerge --sync # emerge --ask --oneshot --verbose '>=net-analyzer/fail2ban-0.8.0-r1'

See Also

http://www.ossec.net/en/attacking-loganalysis.html#fail2ban

https://security.gentoo.org/glsa/200707-13

Plugin Details

Severity: Medium

ID: 25809

File Name: gentoo_GLSA-200707-13.nasl

Version: 1.14

Type: local

Published: 7/30/2007

Updated: 1/6/2021

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.6

CVSS v2

Risk Factor: Medium

Base Score: 6.8

Vector: CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:P

Vulnerability Information

CPE: p-cpe:/a:gentoo:linux:fail2ban, cpe:/o:gentoo:linux

Required KB Items: Host/local_checks_enabled, Host/Gentoo/release, Host/Gentoo/qpkg-list

Patch Publication Date: 7/28/2007

Reference Information

CVE: CVE-2007-4321

GLSA: 200707-13