From: Vasiliy Kulikov <segoon@openwall.com>
Date: Tue, 15 Mar 2011 12:37:13 +0000 (+0100)
Subject: ipv6: netfilter: ip6_tables: fix infoleak to userspace
X-Git-Tag: v2.6.39-rc1~468^2~26^2~2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=6a8ab060779779de8aea92ce3337ca348f973f54;p=pandora-kernel.git

ipv6: netfilter: ip6_tables: fix infoleak to userspace

Structures ip6t_replace, compat_ip6t_replace, and xt_get_revision are
copied from userspace.  Fields of these structs that are
zero-terminated strings are not checked.  When they are used as argument
to a format string containing "%s" in request_module(), some sensitive
information is leaked to userspace via argument of spawned modprobe
process.

The first bug was introduced before the git epoch;  the second was
introduced in 3bc3fe5e (v2.6.25-rc1);  the third is introduced by
6b7d31fc (v2.6.15-rc1).  To trigger the bug one should have
CAP_NET_ADMIN.

Signed-off-by: Vasiliy Kulikov <segoon@openwall.com>
Signed-off-by: Patrick McHardy <kaber@trash.net>
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