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Shorewall Rules / Policies Bypass Security Issue
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Secunia Advisory:
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SA16087
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Release Date:
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2005-07-18
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Last Update:
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2005-07-21
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Popularity:
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6,332 views
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Critical:
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Less critical
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Impact:
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Security Bypass
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Where:
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From local network
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Solution Status:
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Vendor Patch
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| Software: | Shorewall 2.0.x
Shorewall 2.2.x
Shorewall 2.4.x
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Subscribe:
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| CVE reference: | CVE-2005-2317
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Description:
A security issue has been reported in Shorewall, which can be exploited by malicious people to bypass certain security restrictions.
The security issue is caused due to an error that allows a client that has already been authenticated based on its MAC address to bypass all other configured rules and policies.
Successful exploitation requires MACLIST_TTL to be configured to a value greater than 0 or MACLIST_DISPOSITION to be configured as "ACCEPT" .
The security issue has been reported in versions 2.0.x, 2.2.x and 2.4.x.
Solution:
Update to the fixed version of firewall script.
Version 2.4.x:
http://shorewall.net/pub/shorewall/2.4/shorewall-2.4.1/errata/firewall
Version 2.2.x:
http://shorewall.net/pub/shorewall/2.2/shorewall-2.2.5/errata/firewall
Version 2.0.x:
http://shorewall.net/pub/shorewall/errata/2.0.17/firewall
Provided and/or discovered by:
The vendor credits Supernaut.
Changelog:
2005-07-21: Added CVE reference.
Original Advisory:
http://shorewall.net/News.htm#20050717
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About this Secunia Advisory
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Please note: The information that this Secunia Advisory is based on comes from a third party unless stated otherwise.
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