Fedora alert FEDORA-2014-7071 (chkrootkit)

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Subject:
    	     
 
[SECURITY] Fedora 20 Update: chkrootkit-0.49-9.fc20 
Date:
    	     
 
Fri, 13 Jun 2014 05:26:35 +0000
Message-ID:
    	     
 
<20140613052635.84EC8239ED@bastion01.phx2.fedoraproject.org>
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Fedora Update Notification
FEDORA-2014-7071
2014-06-05 03:32:42
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Name        : chkrootkit
Product     : Fedora 20
Version     : 0.49
Release     : 9.fc20
URL         : http://www.chkrootkit.org
Summary     : Tool to locally check for signs of a rootkit
Description :
chkrootkit is a tool to locally check for signs of a rootkit.
It contains:

 * chkrootkit: shell script that checks system binaries for
   rootkit modification.
 * ifpromisc: checks if the network interface is in promiscuous mode.
 * chklastlog: checks for lastlog deletions.
 * chkwtmp: checks for wtmp deletions.
 * chkproc: checks for signs of LKM trojans.
 * chkdirs: checks for signs of LKM trojans.
 * strings: quick and dirty strings replacement.
 * chkutmp: checks for utmp deletions.

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Update Information:

A quoting issue was found in chkrootkit which would lead to a file in /tmp/ being executed, if
/tmp/ was mounted without the noexec option. chkrootkit is typically run as the root user. A local
attacker could use this flaw to escalate their privileges.

The problematic part was:

file_port=$file_port $i

Which is changed to file_port="$file_port $i" to fix the issue. From the Debian diff:

--- chkrootkit-0.49.orig/debian/patches/CVE-2014-0476.patch
+++ chkrootkit-0.49/debian/patches/CVE-2014-0476.patch
@@ -0,0 +1,13 @@
+Index: chkrootkit/chkrootkit
+===================================================================
+--- chkrootkit.orig/chkrootkit
++++ chkrootkit/chkrootkit
+@@ -117,7 +117,7 @@ slapper (){
+    fi
+    for i in ${SLAPPER_FILES}; do
+       if [ -f ${i} ]; then
+-       file_port=$file_port $i
++       file_port="$file_port $i"
+          STATUS=1
+       fi
+    done

Acknowledgements:

Red Hat would like to thank Thomas Stangner for reporting this issue.
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ChangeLog:

* Wed Jun  4 2014 Jon Ciesla <limburgher@gmail.com> - 0.49-9
- Patch for CVE-2014-0476, BZ 1104456, 11044567.
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References:

  [ 1 ] Bug #1104456 - CVE-2014-0476 chkrootkit: local privilege escalation [fedora-all]
        https://bugzilla.redhat.com/show_bug.cgi?id=1104456
  [ 2 ] Bug #1104457 - CVE-2014-0476 chkrootkit: local privilege escalation [epel-all]
        https://bugzilla.redhat.com/show_bug.cgi?id=1104457
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This update can be installed with the "yum" update program.  Use
su -c 'yum update chkrootkit' at the command line.
For more information, refer to "Managing Software with yum",
available at http://docs.fedoraproject.org/yum/.

All packages are signed with the Fedora Project GPG key.  More details on the
GPG keys used by the Fedora Project can be found at
https://fedoraproject.org/keys
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