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Debian DLA-21-1 : fail2ban security update

medium Nessus Plugin ID 82169

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Synopsis

The remote Debian host is missing a security update.

Description

- Use anchored failregex for filters to avoid possible DoS. Manually picked up from the current status of 0.8 branch (as of 0.8.13-29-g09b2016) :

 - CVE-2013-7176: postfix.conf - anchored on the front, expects 'postfix/smtpd' prefix in the log line

 - CVE-2013-7177: cyrus-imap.conf - anchored on the front, and refactored to have a single failregex

 - couriersmtp.conf - anchored on both sides

 - exim.conf - front-anchored versions picked up from exim.conf and exim-spam.conf

 - lighttpd-fastcgi.conf - front-anchored picked up from suhosin.conf (copied from the Wheezy version)

 - Catch also failed logins via secured (imaps/pop3s) for cyrus-imap. Regression was introduced while strengthening failregex in 0.8.11 (bd175f) Debian bug #755173

 - cyrus-imap: catch 'user not found' attempts

NOTE: Tenable Network Security has extracted the preceding description block directly from the DLA security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Solution

Upgrade the affected fail2ban package.

See Also

https://lists.debian.org/debian-lts-announce/2014/07/msg00007.html

https://packages.debian.org/source/squeeze-lts/fail2ban

Plugin Details

Severity: Medium

ID: 82169

File Name: debian_DLA-21.nasl

Version: 1.5

Type: local

Agent: unix

Published: 3/26/2015

Updated: 1/11/2021

Supported Sensors: Agentless Assessment, Frictionless Assessment Agent, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

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

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:fail2ban, cpe:/o:debian:debian_linux:6.0

Required KB Items: Host/local_checks_enabled, Host/Debian/release, Host/Debian/dpkg-l

Exploit Ease: No known exploits are available

Patch Publication Date: 7/26/2014

Reference Information

CVE: CVE-2013-7176, CVE-2013-7177

BID: 65184, 65187