<html>
<head>
<meta content="text/html; charset=UTF-8" http-equiv="Content-Type">
</head>
<body bgcolor="#FFFFFF" text="#000000">
<div class="moz-cite-prefix">On 12/10/13, 4:56 PM, Rodney L. Mercer
wrote:<br>
</div>
<blockquote cite="mid:1386712612.2799.106.camel@osc145" type="cite">
<pre wrap="">On Tue, 2013-12-10 at 16:31 -0500, Rodney L. Mercer wrote:
</pre>
<blockquote type="cite" style="color: #000000;">
<pre wrap=""><span class="moz-txt-citetags">> </span>On Tue, 2013-12-10 at 13:54 -0500, Shawn Wells wrote:
</pre>
<blockquote type="cite" style="color: #000000;">
<pre wrap=""><span class="moz-txt-citetags">> > </span>On 12/9/13, 3:48 PM, Rodney L. Mercer wrote:
<span class="moz-txt-citetags">> > </span>
</pre>
<blockquote type="cite" style="color: #000000;">
<pre wrap=""><span class="moz-txt-citetags">> > > </span>When "Rule ID: kernel_module_ipv6_option_disabled" passes, "Rule ID:
<span class="moz-txt-citetags">> > > </span>sysctl_ipv6_default_accept_redirects" is doomed to failure.
<span class="moz-txt-citetags">> > > </span>
<span class="moz-txt-citetags">> > > </span>I've figured out a fix for the failure of "Rule ID:
<span class="moz-txt-citetags">> > > </span>sysctl_ipv6_default_accept_redirects CCE-27166-8",
<span class="moz-txt-citetags">> > > </span>when "Rule ID: kernel_module_ipv6_option_disabled CCE-27153-6"
<span class="moz-txt-citetags">> > > </span>passes test.
<span class="moz-txt-citetags">> > > </span>
<span class="moz-txt-citetags">> > > </span>
<span class="moz-txt-citetags">> > > </span>I've attached the diff output between my changes and the original of the
<span class="moz-txt-citetags">> > > </span>sysctl_net_ipv6_conf_default_accept_redirects.xml file contents.
<span class="moz-txt-citetags">> > > </span>
<span class="moz-txt-citetags">> > > </span>Unfortunately, the sysctl_net_ipv6_conf_default_accept_redirects.xml
<span class="moz-txt-citetags">> > > </span>file is generated by: create_sysctl_checks.py, and the python script
<span class="moz-txt-citetags">> > > </span>does not take into account the problem.
<span class="moz-txt-citetags">> > > </span>
<span class="moz-txt-citetags">> > > </span>
<span class="moz-txt-citetags">> > > </span>Any suggestions for implementation are appreciated.
<span class="moz-txt-citetags">> > > </span>
<span class="moz-txt-citetags">> > > </span>Thanks,
<span class="moz-txt-citetags">> > > </span>Rodney.
<span class="moz-txt-citetags">> > > </span>
<span class="moz-txt-citetags">> > > </span>sysctl_net_ipv6_conf_default_accept_redirects.xml.diff
<span class="moz-txt-citetags">> > > </span>[root@wahoo checks]# diff sysctl_net_ipv6_conf_default_accept_redirects.xml ~/sysctl_net_ipv6_conf_default_accept_redirects.xml.orig
<span class="moz-txt-citetags">> > > </span>12,22c12,14
<span class="moz-txt-citetags">> > > </span>< <criteria operator="OR">
<span class="moz-txt-citetags">> > > </span>< <criteria operator="AND">
<span class="moz-txt-citetags">> > > </span>< <criterion comment="kernel runtime parameter net.ipv6.conf.default.accept_redirects set to 0" test_ref="test_runtime_sysctl_net_ipv6_conf_default_accept_redirects" />
<span class="moz-txt-citetags">> > > </span>< <criterion comment="kernel /etc/sysctl.conf parameter net.ipv6.conf.default.accept_redirects set to 0" test_ref="test_static_sysctl_net_ipv6_conf_default_accept_redirects" />
<span class="moz-txt-citetags">> > > </span>< </criteria>
<span class="moz-txt-citetags">> > > </span>< <criteria operator="AND">
<span class="moz-txt-citetags">> > > </span>< <extend_definition comment="IPv6 disabled"
<span class="moz-txt-citetags">> > > </span>< definition_ref="kernel_module_ipv6_option_disabled" />
<span class="moz-txt-citetags">> > > </span>< <criterion comment="ipv6 disabled any modprobe conf file"
<span class="moz-txt-citetags">> > > </span>< test_ref="test_kernel_module_ipv6_option_disabled" />
<span class="moz-txt-citetags">> > > </span>< </criteria>
<span class="moz-txt-citetags">> > > </span>---
</pre>
<blockquote type="cite" style="color: #000000;">
<blockquote type="cite" style="color: #000000;">
<pre wrap=""><span class="moz-txt-citetags">> > > > > </span> <criteria operator="AND">
<span class="moz-txt-citetags">> > > > > </span> <criterion comment="kernel runtime parameter net.ipv6.conf.default.accept_redirects set to 0" test_ref="test_runtime_sysctl_net_ipv6_conf_default_accept_redirects" />
<span class="moz-txt-citetags">> > > > > </span> <criterion comment="kernel /etc/sysctl.conf parameter net.ipv6.conf.default.accept_redirects set to 0" test_ref="test_static_sysctl_net_ipv6_conf_default_accept_redirects" />
</pre>
</blockquote>
</blockquote>
</blockquote>
<pre wrap=""><span class="moz-txt-citetags">> > </span>
<span class="moz-txt-citetags">> > </span>Works for me....
<span class="moz-txt-citetags">> > </span>
<span class="moz-txt-citetags">> > </span>[shawn@SSG-RHEL6 checks]$ sudo grep
<span class="moz-txt-citetags">> > </span>ipv6 /etc/modprobe.d/disabled.conf
<span class="moz-txt-citetags">> > </span>options ipv6 disable=1
<span class="moz-txt-citetags">> > </span>
<span class="moz-txt-citetags">> > </span>[shawn@SSG-RHEL6 checks]$ sudo ./testcheck.py
<span class="moz-txt-citetags">> > </span>kernel_module_ipv6_option_disabled.xml
<span class="moz-txt-citetags">> > </span>Evaluating with OVAL
<span class="moz-txt-citetags">> > </span>tempfile : /tmp/kernel_module_ipv6_option_disabledwCcEnH.xml
<span class="moz-txt-citetags">> > </span>Writing results
<span class="moz-txt-citetags">> > </span>to : /tmp/kernel_module_ipv6_option_disabledwCcEnH.xml-results
<span class="moz-txt-citetags">> > </span>Definition oval:scap-security-guide.testing:def:323: true
<span class="moz-txt-citetags">> > </span>Evaluation done.
<span class="moz-txt-citetags">> > </span>
<span class="moz-txt-citetags">> > </span>[shawn@SSG-RHEL6 checks]$ sudo sysctl -a | grep
<span class="moz-txt-citetags">> > </span>net.ipv6.conf.default.accept_redirects
<span class="moz-txt-citetags">> > </span>net.ipv6.conf.default.accept_redirects = 0
<span class="moz-txt-citetags">> > </span>
<span class="moz-txt-citetags">> > </span>[shawn@SSG-RHEL6 checks]$ sudo grep
<span class="moz-txt-citetags">> > </span>"net.ipv6.conf.default.accept_redirects" /etc/sysctl.conf
<span class="moz-txt-citetags">> > </span>net.ipv6.conf.default.accept_redirects = 0
<span class="moz-txt-citetags">> > </span>
<span class="moz-txt-citetags">> > </span>[shawn@SSG-RHEL6 checks]$ ./testcheck.py
<span class="moz-txt-citetags">> > </span>sysctl_net_ipv6_conf_default_accept_redirects.xml
<span class="moz-txt-citetags">> > </span>Evaluating with OVAL
<span class="moz-txt-citetags">> > </span>tempfile : /tmp/sysctl_net_ipv6_conf_default_accept_redirectsH7PBwZ.xml
<span class="moz-txt-citetags">> > </span>Writing results
<span class="moz-txt-citetags">> > </span>to : /tmp/sysctl_net_ipv6_conf_default_accept_redirectsH7PBwZ.xml-results
<span class="moz-txt-citetags">> > </span>Definition oval:scap-security-guide.testing:def:317: true
<span class="moz-txt-citetags">> > </span>Evaluation done.
<span class="moz-txt-citetags">> > </span>
</pre>
</blockquote>
<pre wrap=""><span class="moz-txt-citetags">> </span>Shawn,
<span class="moz-txt-citetags">> </span>
<span class="moz-txt-citetags">> </span>Here is what I get:
<span class="moz-txt-citetags">> </span>
<span class="moz-txt-citetags">> </span>[root@wahoo checks]# grep ipv6 /etc/modprobe.d/disabled.conf
<span class="moz-txt-citetags">> </span>options ipv6 disable=1
<span class="moz-txt-citetags">> </span>
<span class="moz-txt-citetags">> </span>[root@wahoo checks]# ./testcheck.py
<span class="moz-txt-citetags">> </span>kernel_module_ipv6_option_disabled.xml
<span class="moz-txt-citetags">> </span>Evaluating with OVAL
<span class="moz-txt-citetags">> </span>tempfile : /tmp/kernel_module_ipv6_option_disabledCQ3qHP.xml
<span class="moz-txt-citetags">> </span>Writing results
<span class="moz-txt-citetags">> </span>to : /tmp/kernel_module_ipv6_option_disabledCQ3qHP.xml-results
<span class="moz-txt-citetags">> </span>Definition oval:scap-security-guide.testing:def:106: true
<span class="moz-txt-citetags">> </span>Evaluation done.
<span class="moz-txt-citetags">> </span>
<span class="moz-txt-citetags">> </span>[root@wahoo checks]# grep
<span class="moz-txt-citetags">> </span>net.ipv6.conf.default.accept_redirects /etc/sysctl.conf
<span class="moz-txt-citetags">> </span>net.ipv6.conf.default.accept_redirects = 0
<span class="moz-txt-citetags">> </span>
<span class="moz-txt-citetags">> </span>[root@wahoo checks]# sysctl net.ipv6.conf.default.accept_redirect=0
<span class="moz-txt-citetags">> </span>error: "net.ipv6.conf.default.accept_redirect" is an unknown key
<span class="moz-txt-citetags">> </span>
<span class="moz-txt-citetags">> </span>[root@wahoo checks]# sysctl -p |grep
<span class="moz-txt-citetags">> </span>net.ipv6.conf.default.accept_redirect
<span class="moz-txt-citetags">> </span>error: "net.ipv6.conf.default.accept_redirects" is an unknown key
<span class="moz-txt-citetags">> </span>error: "net.bridge.bridge-nf-call-ip6tables" is an unknown key
<span class="moz-txt-citetags">> </span>error: "net.bridge.bridge-nf-call-iptables" is an unknown key
<span class="moz-txt-citetags">> </span>error: "net.bridge.bridge-nf-call-arptables" is an unknown key
<span class="moz-txt-citetags">> </span>
<span class="moz-txt-citetags">> </span>
<span class="moz-txt-citetags">> </span>[root@wahoo checks]# /testcheck.py
<span class="moz-txt-citetags">> </span>sysctl_net_ipv6_conf_default_accept_redirects.xml
<span class="moz-txt-citetags">> </span>bash: /testcheck.py: No such file or directory
<span class="moz-txt-citetags">> </span>[root@wahoo checks]# ./testcheck.py
<span class="moz-txt-citetags">> </span>sysctl_net_ipv6_conf_default_accept_redirects.xml
<span class="moz-txt-citetags">> </span>Evaluating with OVAL
<span class="moz-txt-citetags">> </span>tempfile : /tmp/sysctl_net_ipv6_conf_default_accept_redirectsYGpGVn.xml
<span class="moz-txt-citetags">> </span>Writing results
<span class="moz-txt-citetags">> </span>to : /tmp/sysctl_net_ipv6_conf_default_accept_redirectsYGpGVn.xml-results
<span class="moz-txt-citetags">> </span>Definition oval:scap-security-guide.testing:def:100: false
<span class="moz-txt-citetags">> </span>Evaluation done.
<span class="moz-txt-citetags">> </span>
<span class="moz-txt-citetags">> </span>I also found this old report on the problem:
<span class="moz-txt-citetags">> </span><a moz-do-not-send="true" class="moz-txt-link-freetext" href="https://lists.fedorahosted.org/pipermail/scap-security-guide/2012-May/000567.html">https://lists.fedorahosted.org/pipermail/scap-security-guide/2012-May/000567.html</a>
<span class="moz-txt-citetags">> </span>
<span class="moz-txt-citetags">> </span>
<span class="moz-txt-citetags">> </span>You must have something loaded or enabled that I don't have that allows
<span class="moz-txt-citetags">> </span>sysctl net.ipv6.conf.default.accept_redirect=0 ?
<span class="moz-txt-citetags">> </span>
<span class="moz-txt-citetags">> </span>Thanks,
<span class="moz-txt-citetags">> </span>Rodney.
<span class="moz-txt-citetags">> </span>
</pre>
</blockquote>
<pre wrap="">I don't have /proc/sys/net/ipv6 on the hardened RHEL6 machine.
[root@wahoo checks]# ls <i class="moz-txt-slash"><span class="moz-txt-tag">/</span>proc/sys/net<span class="moz-txt-tag">/</span></i>
core ipv4 netfilter nf_conntrack_max unix
I assume that you must have:
# cat /proc/sys/net/ipv6/conf/all/accept_redirects
1</pre>
</blockquote>
<br>
Or, you know, I could have rebooted after disabling IPv6... =/<br>
<br>
Fully able to replicate your setup after a reboot. Pushed your
bugfix:<br>
<a class="moz-txt-link-freetext" href="https://git.fedorahosted.org/cgit/scap-security-guide.git/commit/?id=6a271a5df50529dc0ee4800dfce0933114c4677b">https://git.fedorahosted.org/cgit/scap-security-guide.git/commit/?id=6a271a5df50529dc0ee4800dfce0933114c4677b</a><br>
<br>
Made a slight change to reflect updated signoff date, and removed
this check from the sysctl templates.<br>
</body>
</html>