ESB-2017.2644 - [FreeBSD] wpa: Multiple vulnerabilities 2017-10-19

Printable version
PGP/GPG verifiable version

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256

===========================================================================
             AUSCERT External Security Bulletin Redistribution

                               ESB-2017.2644
                        WPA2 protocol vulnerability
                              19 October 2017

===========================================================================

        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           wpa
Publisher:         FreeBSD
Operating System:  FreeBSD
Impact/Access:     Access Privileged Data         -- Remote/Unauthenticated      
                   Provide Misleading Information -- Remote with User Interaction
Resolution:        Patch/Upgrade
CVE Names:         CVE-2017-13088 CVE-2017-13087 CVE-2017-13086
                   CVE-2017-13082 CVE-2017-13081 CVE-2017-13080
                   CVE-2017-13079 CVE-2017-13078 CVE-2017-13077

Reference:         ESB-2017.2638
                   ESB-2017.2628
                   ESB-2017.2620
                   ESB-2017.2600

Original Bulletin: 
   https://security.freebsd.org/advisories/FreeBSD-SA-17:07.wpa.asc

- --------------------------BEGIN INCLUDED TEXT--------------------

- -----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA512

=============================================================================
FreeBSD-SA-17:07.wpa                                        Security Advisory
                                                          The FreeBSD Project

Topic:          WPA2 protocol vulnerability

Category:       contrib
Module:         wpa
Announced:      2017-10-16
Credits:        Mathy Vanhoef
Affects:        All supported versions of FreeBSD.
Corrected:      2017-10-17 17:30:18 UTC (stable/11, 11.1-STABLE)
                2017-10-17 17:57:18 UTC (releng/11.1, 11.1-RELEASE-p2)
                2017-10-17 17:56:03 UTC (releng/11.0, 11.0-RELEASE-p13)
CVE Name:       CVE-2017-13077, CVE-2017-13078, CVE-2017-13079,
                CVE-2017-13080, CVE-2017-13081, CVE-2017-13082,
                CVE-2017-13086, CVE-2017-13087, CVE-2017-13088

For general information regarding FreeBSD Security Advisories,
including descriptions of the fields above, security branches, and the
following sections, please visit <URL:https://security.FreeBSD.org/>.

I.   Background

Wi-Fi Protected Access II (WPA2) is a security protocol developed by the
Wi-Fi Alliance to secure wireless computer networks.

hostapd and wpa_supplicant are implementations of user space daemon for
access points and wireless client that implements the WPA2 protocol.

II.  Problem Description

A vulnerability was found in how a number of implementations can be
triggered to reconfigure WPA/WPA2/RSN keys (TK, GTK, or IGTK) by
replaying a specific frame that is used to manage the keys.

III. Impact

Such reinstallation of the encryption key can result in two different
types of vulnerabilities: disabling replay protection and significantly
reducing the security of encryption to the point of allowing frames to
be decrypted or some parts of the keys to be determined by an attacker
depending on which cipher is used.

IV.  Workaround

An updated version of wpa_supplicant is available in the FreeBSD Ports
Collection. Install version 2.6_2 or later of the
security/wpa_supplicant port/pkg. Once installed, update /etc/rc.conf
to use the new binary:

wpa_supplicant_program="/usr/local/sbin/wpa_supplicant"

and restart networking.

An updated version of hostapd is available in the FreeBSD Ports
Collection. Install version 2.6_1 or later of the net/hostapd port/pkg.
Once installed, update /etc/rc.conf to use the new binary:

hostapd_program="/usr/local/sbin/hostapd"

and restart hostapd.

V.   Solution

Patches are currently available for stable/11, releng/11.0, and
releng/11.1. Patches for stable/10, releng/10.3, and releng/10.4 are
still being evaluated.

Perform one of the following:

1) Upgrade your vulnerable system to a supported FreeBSD stable or
release / security branch (releng) dated after the correction date.

Restart the Wi-Fi network interfaces/hostapd or reboot the system.

2) To update your vulnerable system via a binary patch:

Systems running a RELEASE version of FreeBSD on the i386 or amd64
platforms can be updated via the freebsd-update(8) utility:

# freebsd-update fetch
# freebsd-update install

Restart the Wi-Fi network interfaces/hostapd or reboot the system.

3) To update your vulnerable system via a source code patch:

The following patches have been verified to apply to the applicable
FreeBSD release branches.

a) Download the relevant patch from the location below, and verify the
detached PGP signature using your PGP utility.

[FreeBSD 11.0-RELEASE, 11.1-RELEASE, and 11-STABLE]
# fetch https://security.FreeBSD.org/patches/SA-17:07/wpa-11.patch
# fetch https://security.FreeBSD.org/patches/SA-17:07/wpa-11.patch.asc
# gpg --verify wpa-11.patch.asc

b) Apply the patch.  Execute the following commands as root:

# cd /usr/src
# patch < /path/to/patch

c) Recompile the operating system using buildworld and installworld as
described in <URL:https://www.FreeBSD.org/handbook/makeworld.html>.

Restart the applicable daemons, or reboot the system.

VI.  Correction details

The following list contains the correction revision numbers for each
affected branch.

Branch/path                                                      Revision
- - -------------------------------------------------------------------------
stable/11/                                                        r324697
releng/11.0/                                                      r324698
releng/11.1/                                                      r324699
- - -------------------------------------------------------------------------

To see which files were modified by a particular revision, run the
following command, replacing NNNNNN with the revision number, on a
machine with Subversion installed:

# svn diff -cNNNNNN --summarize svn://svn.freebsd.org/base

Or visit the following URL, replacing NNNNNN with the revision number:

<URL:https://svnweb.freebsd.org/base?view=revision&revision=NNNNNN>

VII. References

<URL:https://w1.fi/security/2017-1/wpa-packet-number-reuse-with-replayed-messages.txt>
<URL:https://www.krackattacks.com/>

The latest revision of this advisory is available at
<URL:https://security.FreeBSD.org/advisories/FreeBSD-SA-17:07.wpa.asc>
- -----BEGIN PGP SIGNATURE-----
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=aNWn
- -----END PGP SIGNATURE-----

- --------------------------END INCLUDED TEXT--------------------

You have received this e-mail bulletin as a result of your organisation's
registration with AusCERT. The mailing list you are subscribed to is
maintained within your organisation, so if you do not wish to continue
receiving these bulletins you should contact your local IT manager. If
you do not know who that is, please send an email to auscert@auscert.org.au
and we will forward your request to the appropriate person.

NOTE: Third Party Rights
This security bulletin is provided as a service to AusCERT's members.  As
AusCERT did not write the document quoted above, AusCERT has had no control
over its content. The decision to follow or act on information or advice
contained in this security bulletin is the responsibility of each user or
organisation, and should be considered in accordance with your organisation's
site policies and procedures. AusCERT takes no responsibility for consequences
which may arise from following or acting on information or advice contained in
this security bulletin.

NOTE: This is only the original release of the security bulletin.  It may
not be updated when updates to the original are made.  If downloading at
a later date, it is recommended that the bulletin is retrieved directly
from the author's website to ensure that the information is still current.

Contact information for the authors of the original document is included
in the Security Bulletin above.  If you have any questions or need further
information, please contact them directly.

Previous advisories and external security bulletins can be retrieved from:

        https://www.auscert.org.au/bulletins/

===========================================================================
Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072

Internet Email: auscert@auscert.org.au
Facsimile:      (07) 3365 7031
Telephone:      (07) 3365 4417 (International: +61 7 3365 4417)
                AusCERT personnel answer during Queensland business hours
                which are GMT+10:00 (AEST).
                On call after hours for member emergencies only.
===========================================================================
-----BEGIN PGP SIGNATURE-----
Comment: http://www.auscert.org.au/render.html?it=1967
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=1+41
-----END PGP SIGNATURE-----

« Back to bulletins