Vulnerability Assessment & Network Security Forums



If through a vulnerability assessment, a network security issue is detected for the vulnerability below, applying the appropriate security patches in a timely matter is very important.  If you have detected that your system has already been compromised, following CERT's Network Security recovery document will assist with recommended steps for system recovery.


Home >> Browse Vulnerability Assessment Database >> Gentoo Local Security Checks >> [GLSA-200507-20] Shorewall: Security policy bypass


Vulnerability Assessment Details

[GLSA-200507-20] Shorewall: Security policy bypass

Vulnerability Assessment Summary
Shorewall: Security policy bypass

Detailed Explanation for this Vulnerability Assessment
The remote host is affected by the vulnerability described in GLSA-200507-20
(Shorewall: Security policy bypass)


Shorewall fails to enforce security policies if configured with
"MACLIST_DISPOSITION" set to "ACCEPT" or "MACLIST_TTL" set to a value
greater or equal to 0.

Impact

A client authenticated by MAC address filtering could bypass all
security policies, possibly permiting him to gain access to restricted
services.

Workaround

Set "MACLIST_TTL" to "0" and "MACLIST_DISPOSITION" to "REJECT" in
the Shorewall configuration file (usually
/etc/shorewall/shorewall.conf).

References:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2005-2317
http://www.shorewall.net/News.htm#20050717


Solution:
All Shorewall users should upgrade to the latest available
version:
# emerge --sync
# emerge --ask --oneshot --verbose net-firewall/shorewall


Network Security Threat Level: Low


Networks Security ID:

Vulnerability Assessment Copyright: (C) 2005 Michel Arboi

Cables, Connectors

Red Hat Enterprise-Linux 7 Server-Source Discs
$59.99
Red Hat Enterprise-Linux 7 Server-Source Discs pictureRaspberry PI 2B / 3B Game Servers Multi-Boot OpenArena / AssaultCube / Minecraft
$6.95
Raspberry PI 2B / 3B Game Servers Multi-Boot OpenArena / AssaultCube / Minecraft pictureCompTIA A+ Network+ Server+ Security+ Linux+ Video Training Tutorials CBT
$9.99
CompTIA A+ Network+ Server+ Security+ Linux+ Video Training Tutorials CBT pictureSystem Rescue , Operating System to Recover for Desktop, Work Station or Server
$2.24
System Rescue , Operating System to Recover for Desktop, Work Station or Server picture


Discussions

No Discussions have been posted on this vulnerability.