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Category:   Application (Generic)  >   wpa_supplicant Vendors:   Malinen, Jouni et al
(Red Hat Issues Fix) wpa_supplicant WPA/WPA2 Protocol Key Reinstallation Attack Lets Remote Users Access and Modify Data on the Target Wireless Network
SecurityTracker Alert ID:  1039593
SecurityTracker URL:  http://securitytracker.com/id/1039593
CVE Reference:   CVE-2017-13077, CVE-2017-13078, CVE-2017-13080, CVE-2017-13082, CVE-2017-13086, CVE-2017-13087, CVE-2017-13088   (Links to External Site)
Date:  Oct 17 2017
Impact:   Disclosure of system information, Disclosure of user information, Modification of system information, Modification of user information
Fix Available:  Yes  Vendor Confirmed:  Yes  Exploit Included:  Yes  
Version(s): 2.6 and prior
Description:   Multiple vulnerabilities were reported in wpa_supplicant. A remote user on the wireless network can access and modify data on the wireless network.

A remote user within range of the wireless network can record and replay retransmissions of part of the 802.11i 4-way handshake of the WPA and WPA2 protocols to force a reinstallation of the pairwise transient key, a group key, or an integrity key and force a reset of the incremental transmit packet number nonce and the receive replay counter. As a result, the remote user can replay encrypted packets, decrypt packets, and forge packets.

Both client systems and access points are affected.

A remote user on the wireless network can reinstall the pairwise encryption key (PTK-TK) [CVE-2017-13077].

A remote user on the wireless network can reinstall the group key (GTK) [CVE-2017-13078, CVE-2017-13080].

A remote user on the wireless network can reinstall the integrity group key (IGTK) [CVE-2017-13079, CVE-2017-13081].

A remote user on the wireless network can retransmit the Fast BSS Transition (FT) Reassociation Request and reinstall the pairwise encryption key (PTK-TK) [CVE-2017-13082].

A remote user on the wireless network can reinstall the Tunneled Direct-Link Setup (TDLS) PeerKey (TPK) key in the TDLS handshake [CVE-2017-13086].

A remote user on the wireless network can reinstall the group key (GTK) when processing a Wireless Network Management (WNM) Sleep Mode Response frame [CVE-2017-13087].

A remote user on the wireless network can reinstall the integrity group key (IGTK) when processing a Wireless Network Management (WNM) Sleep Mode Response frame [CVE-2017-13088].

This set of vulnerabilities is referred to as KRACK (Key Reinstallation AttaCK).

The original advisory is available at:

https://papers.mathyvanhoef.com/ccs2017.pdf

Additional information is available at:

https://www.krackattacks.com/

Mathy Vanhoef and Frank Piessens from Katholieke Universiteit Leuven reported these vulnerabilities. John Van Boxtel from Cypress reported one vulnerability.

[Editor's note: The vulnerabilities reside in the WPA and WPA2 protocol specification and are not due to incorrect vendor implementation of the standards.]

Impact:   A remote user on the wireless network can access and modify data on the wireless network.
Solution:   Red Hat has issued a fix for CVE-2017-13077, CVE-2017-13078, CVE-2017-13080, CVE-2017-13082, CVE-2017-13086, CVE-2017-13087, and CVE-2017-13088.

The Red Hat advisory is available at:

https://access.redhat.com/errata/RHSA-2017:2907

Vendor URL:  access.redhat.com/errata/RHSA-2017:2907 (Links to External Site)
Cause:   Access control error, State error
Underlying OS:  Linux (Red Hat Enterprise)
Underlying OS Comments:  7

Message History:   This archive entry is a follow-up to the message listed below.
Oct 16 2017 wpa_supplicant WPA/WPA2 Protocol Key Reinstallation Attack Lets Remote Users Access and Modify Data on the Target Wireless Network



 Source Message Contents

Subject:  [RHSA-2017:2907-01] Important: wpa_supplicant security update

-----BEGIN PGP SIGNED MESSAGE-----
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=====================================================================
                   Red Hat Security Advisory

Synopsis:          Important: wpa_supplicant security update
Advisory ID:       RHSA-2017:2907-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://access.redhat.com/errata/RHSA-2017:2907
Issue date:        2017-10-17
CVE Names:         CVE-2017-13077 CVE-2017-13078 CVE-2017-13080 
                   CVE-2017-13082 CVE-2017-13086 CVE-2017-13087 
                   CVE-2017-13088 
=====================================================================

1. Summary:

An update for wpa_supplicant is now available for Red Hat Enterprise Linux
7.

Red Hat Product Security has rated this update as having a security impact
of Important. A Common Vulnerability Scoring System (CVSS) base score,
which gives a detailed severity rating, is available for each vulnerability
from the CVE link(s) in the References section.

2. Relevant releases/architectures:

Red Hat Enterprise Linux Client (v. 7) - x86_64
Red Hat Enterprise Linux ComputeNode (v. 7) - x86_64
Red Hat Enterprise Linux Server (v. 7) - aarch64, ppc64, ppc64le, s390x, x86_64
Red Hat Enterprise Linux Workstation (v. 7) - x86_64

3. Description:

The wpa_supplicant packages contain an 802.1X Supplicant with support for
WEP, WPA, WPA2 (IEEE 802.11i / RSN), and various EAP authentication
methods. They implement key negotiation with a WPA Authenticator for client
stations and controls the roaming and IEEE 802.11 authentication and
association of the WLAN driver.

Security Fix(es):

* A new exploitation technique called key reinstallation attacks (KRACK)
affecting WPA2 has been discovered. A remote attacker within Wi-Fi range
could exploit these attacks to decrypt Wi-Fi traffic or possibly inject
forged Wi-Fi packets by manipulating cryptographic handshakes used by the
WPA2 protocol. (CVE-2017-13077, CVE-2017-13078, CVE-2017-13080,
CVE-2017-13082, CVE-2017-13086, CVE-2017-13087, CVE-2017-13088)

Red Hat would like to thank CERT for reporting these issues. Upstream
acknowledges Mathy Vanhoef (University of Leuven) as the original reporter
of these issues.

4. Solution:

For details on how to apply this update, which includes the changes
described in this advisory, refer to:

https://access.redhat.com/articles/11258

5. Bugs fixed (https://bugzilla.redhat.com/):

1491692 - CVE-2017-13077 wpa_supplicant: Reinstallation of the pairwise key in the 4-way handshake
1491693 - CVE-2017-13078 wpa_supplicant: Reinstallation of the group key in the 4-way handshake
1491696 - CVE-2017-13080 wpa_supplicant: Reinstallation of the group key in the group key handshake
1491698 - CVE-2017-13082 wpa_supplicant: Accepting a retransmitted FT Reassociation Request and reinstalling the pairwise key while processing it
1500302 - CVE-2017-13086 wpa_supplicant: reinstallation of the Tunneled Direct-Link Setup (TDLS) PeerKey (TPK) key in the TDLS handshake
1500303 - CVE-2017-13087 wpa_supplicant: reinstallation of the group key (GTK) when processing a Wireless Network Management (WNM) Sleep Mode Response frame
1500304 - CVE-2017-13088 wpa_supplicant: reinstallation of the integrity group key (IGTK) when processing a Wireless Network Management (WNM) Sleep Mode Response frame

6. Package List:

Red Hat Enterprise Linux Client (v. 7):

Source:
wpa_supplicant-2.6-5.el7_4.1.src.rpm

x86_64:
wpa_supplicant-2.6-5.el7_4.1.x86_64.rpm
wpa_supplicant-debuginfo-2.6-5.el7_4.1.x86_64.rpm

Red Hat Enterprise Linux ComputeNode (v. 7):

Source:
wpa_supplicant-2.6-5.el7_4.1.src.rpm

x86_64:
wpa_supplicant-2.6-5.el7_4.1.x86_64.rpm
wpa_supplicant-debuginfo-2.6-5.el7_4.1.x86_64.rpm

Red Hat Enterprise Linux Server (v. 7):

Source:
wpa_supplicant-2.6-5.el7_4.1.src.rpm

aarch64:
wpa_supplicant-2.6-5.el7_4.1.aarch64.rpm
wpa_supplicant-debuginfo-2.6-5.el7_4.1.aarch64.rpm

ppc64:
wpa_supplicant-2.6-5.el7_4.1.ppc64.rpm
wpa_supplicant-debuginfo-2.6-5.el7_4.1.ppc64.rpm

ppc64le:
wpa_supplicant-2.6-5.el7_4.1.ppc64le.rpm
wpa_supplicant-debuginfo-2.6-5.el7_4.1.ppc64le.rpm

s390x:
wpa_supplicant-2.6-5.el7_4.1.s390x.rpm
wpa_supplicant-debuginfo-2.6-5.el7_4.1.s390x.rpm

x86_64:
wpa_supplicant-2.6-5.el7_4.1.x86_64.rpm
wpa_supplicant-debuginfo-2.6-5.el7_4.1.x86_64.rpm

Red Hat Enterprise Linux Workstation (v. 7):

Source:
wpa_supplicant-2.6-5.el7_4.1.src.rpm

x86_64:
wpa_supplicant-2.6-5.el7_4.1.x86_64.rpm
wpa_supplicant-debuginfo-2.6-5.el7_4.1.x86_64.rpm

These packages are GPG signed by Red Hat for security.  Our key and
details on how to verify the signature are available from
https://access.redhat.com/security/team/key/

7. References:

https://access.redhat.com/security/cve/CVE-2017-13077
https://access.redhat.com/security/cve/CVE-2017-13078
https://access.redhat.com/security/cve/CVE-2017-13080
https://access.redhat.com/security/cve/CVE-2017-13082
https://access.redhat.com/security/cve/CVE-2017-13086
https://access.redhat.com/security/cve/CVE-2017-13087
https://access.redhat.com/security/cve/CVE-2017-13088
https://access.redhat.com/security/updates/classification/#important
https://access.redhat.com/security/vulnerabilities/kracks

8. Contact:

The Red Hat security contact is <secalert@redhat.com>. More contact
details at https://access.redhat.com/security/team/contact/

Copyright 2017 Red Hat, Inc.
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