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Debian DSA-849-1 : shorewall - programming error

high Nessus Plugin ID 19957

Synopsis

The remote Debian host is missing a security-related update.

Description

'Supernaut' noticed that shorewall, the Shoreline Firewall, could generate an iptables configuration which is significantly more permissive than the rule set given in the shorewall configuration, if MAC verification are used in a non-default manner.

When MACLIST_DISPOSITION is set to ACCEPT in the shorewall.conf file, all packets from hosts which fail the MAC verification pass through the firewall, without further checks. When MACLIST_TTL is set to a non-zero value, packets from hosts which pass the MAC verification pass through the firewall, again without further checks.

Solution

Upgrade the shorewall package.

The old stable distribution (woody) is not affected by this problem.

For the stable distribution (sarge) this problem has been fixed in version 2.2.3-2.

See Also

http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=318946

http://www.debian.org/security/2005/dsa-849

Plugin Details

Severity: High

ID: 19957

File Name: debian_DSA-849.nasl

Version: 1.18

Type: local

Agent: unix

Published: 10/11/2005

Updated: 1/4/2021

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

Risk Information

VPR

Risk Factor: Medium

Score: 4.7

CVSS v2

Risk Factor: High

Base Score: 7.5

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

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:shorewall, cpe:/o:debian:debian_linux:3.1

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

Patch Publication Date: 10/8/2005

Vulnerability Publication Date: 7/17/2005

Reference Information

CVE: CVE-2005-2317

DSA: 849