Date: Mon, 4 Jan 1999 00:55:14 -0600 (CST)
From: Marc Santoro <[email protected]>
To: [email protected], [email protected]Subject: ipchains security hole
Cc: [email protected], [email protected]
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Content-ID: <Pine.LNX.4.02.9901032334531.5383@localhost>
Description:
The Linux ipfwchains code allows any user to access the complete
list of firewall rules if /proc is mounted. The list of firewall rules
would be extremely useful for a system attack.
Exploit:
(as any user)
$ cat /proc/net/ip_fwchains
$ cat /proc/net/ip_fwnames
Fix:
Apply the attached kernel patch.
Works against 2.1.131 & 2.2.0-pre4, YMMV
Tested against:
Linux kernel versions 2.1.131->2.2.0-pre4 (Not regression tested)
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