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Bug 1006299

Summary: Missing RELRO hardening on loadable modules
Product: Red Hat Enterprise Linux 7 Reporter: Daniel Berrangé <berrange>
Component: libvirtAssignee: Jiri Denemark <jdenemar>
Status: CLOSED CURRENTRELEASE QA Contact: Virtualization Bugs <virt-bugs>
Severity: unspecified Docs Contact:
Priority: unspecified    
Version: 7.0CC: acathrow, ajia, cwei, dyuan, jdenemar, lsu
Target Milestone: rc   
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard:
Fixed In Version: libvirt-1.1.1-5.el7 Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2014-06-13 12:09:30 UTC Type: Bug
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Attachments:
Description Flags
qemu.so's reloro log via readelf tool none

Description Daniel Berrangé 2013-09-10 12:07:04 UTC 
Description of problem:
It is a goal for libvirt in RHEL-7 to have full RELRO hardening. Unfortunately we missed this for the loadable modules, per this upstream commit

commit f1f0e53b0814aab3c093f1219da95c0f836cdf4a
Author: Guido Günther <agx>
Date:   Sun Sep 1 08:50:58 2013 +0200

    Pass AM_LDFLAGS to driver modules too
    
    This gives us a RO got, otherwise Debian's lintian complains:
    
    W: libvirt-bin: hardening-no-relro usr/lib/libvirt/connection-driver/libvirt_driver_qemu.so
    W: libvirt-bin: hardening-no-relro usr/lib/libvirt/connection-driver/libvirt_driver_storage.so
    W: libvirt-bin: hardening-no-relro usr/lib/libvirt/connection-driver/libvirt_driver_uml.so
    W: libvirt-bin: hardening-no-relro usr/lib/libvirt/connection-driver/libvirt_driver_vbox.so
    W: libvirt-bin: hardening-no-relro usr/lib/libvirt/connection-driver/libvirt_driver_xen.so
    W: libvirt-bin: hardening-no-relro usr/lib/libvirt/connection-driver/libvirt_driver_nwfilter.so
    W: libvirt-bin: hardening-no-relro usr/lib/libvirt/connection-driver/libvirt_driver_storage.so
    W: libvirt-bin: hardening-no-relro usr/lib/libvirt/connection-driver/libvirt_driver_uml.so
    W: libvirt-sanlock: hardening-no-relro usr/lib/libvirt/lock-driver/sanlock.so


Version-Release number of selected component (if applicable):
libvirt-1.1.1-4.el7

How reproducible:
Always

Steps to Reproduce:
1. Use 'eu-readelf -a' to look for the 'BIND_NOW' flag on every .so file in the libvirt RPMs
2.
3.

Actual results:
$ eu-readelf  -a /usr/lib64/libvirt/connection-driver/libvirt_driver_qemu.so  | grep BIND_NOW


Expected results:
$ eu-readelf  -a /usr/lib64/libvirt/connection-driver/libvirt_driver_qemu.so | grep BIND_NOW
  BIND_NOW          


Additional info:
Comment 4 Luwen Su 2013-11-22 08:18:21 UTC 
Created attachment 827614 [details]
qemu.so's reloro log via readelf tool
Comment 5 Luwen Su 2013-11-22 08:19:09 UTC 
Hi Jiri , 

I found both -4 version which don't have the patch and -12 version that don't have key word BIND_NOW but GNU_RELRO .

Is there a another way to prove that those file have full RELRO hardening ?
I upload the log of the command

#eu-readelf  -a /usr/lib64/libvirt/connection-driver/libvirt_driver_qemu.so

with latest libvirt
Comment 6 Jiri Denemark 2013-12-02 12:59:37 UTC 
No idea. It was rpmdiff that complained about this and it stopped complaining once we added the patch :-)
Comment 7 Luwen Su 2013-12-31 07:12:01 UTC 
Jiri , could you provide a command line with rpmdiff to reproduce the hardening-no-relro warning on rhel ?

I try to used lintian  , but found there is no libvirt-1.1.1-4-bin any more on debians side , seems like they don't keep those old unstable package.

BTW , libvirt-1.2.0-bin passed without warning via lintian.
Comment 11 Ludek Smid 2014-06-13 12:09:30 UTC 
This request was resolved in Red Hat Enterprise Linux 7.0.

Contact your manager or support representative in case you have further questions about the request.