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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
Plugin Details
Severity: Medium
ID: 82169
File Name: debian_DLA-21.nasl
Version: 1.5
Type: local
Agent: unix
Family: Debian Local Security Checks
Published: 3/26/2015
Updated: 1/11/2021
Supported Sensors: Agentless Assessment, Continuous 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