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Category:   Application (Generic)  >   wpa_supplicant Vendors:   Malinen, Jouni et al
(Red Hat Issues Fix) wpa_supplicant EAPOL-Key Data Processing Flaw Lets Remote Users Deny Service
SecurityTracker Alert ID:  1041993
SecurityTracker URL:  http://securitytracker.com/id/1041993
CVE Reference:   CVE-2018-14526   (Links to External Site)
Date:  Oct 30 2018
Impact:   Denial of service via network
Fix Available:  Yes  Vendor Confirmed:  Yes  

Description:   A vulnerability was reported in wpa_supplicant. A remote user can cause denial of service conditions on the target system.

A remote user can send specially crafted unauthenticated EAPOL-Key frame data to modify the Group Transient Key (GTK) on the target system, preventing the target system from accepting group-addressed frames.

Systems where WPA2/RSN style of EAPOL-Key construction is used with TKIP negotiated as the pairwise cipher (which should not be done) are affected.

Mathy Vanhoef of the imec-DistriNet research group of KU Leuven reported this vulnerability.

Impact:   A remote user can cause denial of service conditions.
Solution:   Red Hat has issued a fix.

The Red Hat advisory is available at:

https://access.redhat.com/errata/RHSA-2018:3107

Vendor URL:  access.redhat.com/errata/RHSA-2018:3107 (Links to External Site)
Cause:   Authentication 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.
Aug 9 2018 wpa_supplicant EAPOL-Key Data Processing Flaw Lets Remote Users Deny Service



 Source Message Contents

Subject:  [RHSA-2018:3107-01] Moderate: wpa_supplicant security and bug fix update

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=====================================================================
                   Red Hat Security Advisory

Synopsis:          Moderate: wpa_supplicant security and bug fix update
Advisory ID:       RHSA-2018:3107-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://access.redhat.com/errata/RHSA-2018:3107
Issue date:        2018-10-30
CVE Names:         CVE-2018-14526 
=====================================================================

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 Moderate. 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) - ppc64, ppc64le, s390x, x86_64
Red Hat Enterprise Linux Workstation (v. 7) - x86_64
Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7) - aarch64, ppc64le, s390x

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):

* wpa_supplicant: Unauthenticated EAPOL-Key decryption in wpa_supplicant
(CVE-2018-14526)

For more details about the security issue(s), including the impact, a CVSS
score, and other related information, refer to the CVE page(s) listed in
the References section.

Additional Changes:

For detailed information on changes in this release, see the Red Hat
Enterprise Linux 7.6 Release Notes linked from the References section.

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/):

1434434 - wpa_supplicant is responding to packets which are not destined for it.
1490885 - NetworkManager's mac randomization can lead into MSK mismatch with hostapd and 802.1x
1614520 - CVE-2018-14526 wpa_supplicant: Unauthenticated EAPOL-Key decryption in wpa_supplicant

6. Package List:

Red Hat Enterprise Linux Client (v. 7):

Source:
wpa_supplicant-2.6-12.el7.src.rpm

x86_64:
wpa_supplicant-2.6-12.el7.x86_64.rpm
wpa_supplicant-debuginfo-2.6-12.el7.x86_64.rpm

Red Hat Enterprise Linux ComputeNode (v. 7):

Source:
wpa_supplicant-2.6-12.el7.src.rpm

x86_64:
wpa_supplicant-2.6-12.el7.x86_64.rpm
wpa_supplicant-debuginfo-2.6-12.el7.x86_64.rpm

Red Hat Enterprise Linux Server (v. 7):

Source:
wpa_supplicant-2.6-12.el7.src.rpm

ppc64:
wpa_supplicant-2.6-12.el7.ppc64.rpm
wpa_supplicant-debuginfo-2.6-12.el7.ppc64.rpm

ppc64le:
wpa_supplicant-2.6-12.el7.ppc64le.rpm
wpa_supplicant-debuginfo-2.6-12.el7.ppc64le.rpm

s390x:
wpa_supplicant-2.6-12.el7.s390x.rpm
wpa_supplicant-debuginfo-2.6-12.el7.s390x.rpm

x86_64:
wpa_supplicant-2.6-12.el7.x86_64.rpm
wpa_supplicant-debuginfo-2.6-12.el7.x86_64.rpm

Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7):

Source:
wpa_supplicant-2.6-12.el7.src.rpm

aarch64:
wpa_supplicant-2.6-12.el7.aarch64.rpm
wpa_supplicant-debuginfo-2.6-12.el7.aarch64.rpm

ppc64le:
wpa_supplicant-2.6-12.el7.ppc64le.rpm
wpa_supplicant-debuginfo-2.6-12.el7.ppc64le.rpm

s390x:
wpa_supplicant-2.6-12.el7.s390x.rpm
wpa_supplicant-debuginfo-2.6-12.el7.s390x.rpm

Red Hat Enterprise Linux Workstation (v. 7):

Source:
wpa_supplicant-2.6-12.el7.src.rpm

x86_64:
wpa_supplicant-2.6-12.el7.x86_64.rpm
wpa_supplicant-debuginfo-2.6-12.el7.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-2018-14526
https://access.redhat.com/security/updates/classification/#moderate
https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/7/html/7.6_release_notes/index

8. Contact:

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

Copyright 2018 Red Hat, Inc.
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