----- Original Message -----
From: "Shawn Wells" <shawn(a)redhat.com>
To: scap-security-guide(a)lists.fedorahosted.org
Sent: Sunday, December 1, 2013 7:28:24 AM
Subject: Re: PATCH] [RHEL6] Add remediation for Disable Prelinking rule
On 11/30/13, 11:35 AM, Dave Smith wrote:
This looks great, please push!
On 11/27/2013 10:40 AM, Jan Lieskovsky wrote:
Proposal for the "2.1.3.1.b. Disable Prelinking"
rule remediation.
Please review.
Thank you && Regards, Jan.
--
Jan iankko Lieskovsky / Red Hat Security Technologies Team
0001-RHEL6-Add-remediation-for-Disable-Prelinking-rule.patch
From 102d335388c881e6f825b48c54e33f0e1e623767 Mon Sep 17 00:00:00 2001
From: Jan Lieskovsky <jlieskov(a)redhat.com> Date: Wed, 27 Nov 2013 16:36:04
+0100
Subject: [PATCH] [RHEL6] Add remediation for Disable Prelinking rule
Signed-off-by: Jan Lieskovsky <jlieskov(a)redhat.com> ---
RHEL6/input/fixes/bash/disable_prelink.sh | 9 +++++++++
1 file changed, 9 insertions(+)
create mode 100644 RHEL6/input/fixes/bash/disable_prelink.sh
diff --git a/RHEL6/input/fixes/bash/disable_prelink.sh
b/RHEL6/input/fixes/bash/disable_prelink.sh
new file mode 100644
index 0000000..98dc85d
--- /dev/null
+++ b/RHEL6/input/fixes/bash/disable_prelink.sh
@@ -0,0 +1,9 @@
+#
+# Disable prelinking altogether
+#
+sed -i "s/PRELINKING.*/PRELINKING=no/g" /etc/sysconfig/prelink
+
+#
+# Undo previous prelink changes to binaries
+#
+/usr/sbin/prelink -ua
--
1.8.3.1
What if PRELINK was commented out? e.g.
# grep PRELINKING /etc/sysconfig/prelink
#PRELINKING=commented
[root@SSG-RHEL6 shared]# sed -i "s/PRELINKING.*/PRELINKING=no/g"
/etc/sysconfig/prelink
[root@SSG-RHEL6 shared]# grep PRELINKING /etc/sysconfig/prelink
#PRELINKING=no
That's why the sysctl (+others) use something like:
if grep --silent ^PRELINKING /etc/sysconfig/prelink ; then
sed -i 's/^PRELINKING.*/PRELINKING=no/g' /etc/sysconfig/prelink
else
echo "" >> /etc/sysconfig/prelink
echo "# Set PRELINKING=no per security requirements" >>
/etc/sysconfig/prelink
echo "PRELINKING=no" >> /etc/sysconfig/prelink
Thanks, Shawn. Right, good catch.
Proposal updated and pushed:
https://git.fedorahosted.org/cgit/scap-security-guide.git/commit/?id=4f79...
Thank you && Regards, Jan.
--
Jan iankko Lieskovsky / Red Hat Security Technologies Team
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