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Category:   Application (Generic)  >   wpa_supplicant Vendors:   Malinen, Jouni et al
(Oracle Issues Fix for Oracle Linux) wpa_supplicant EAPOL-Key Data Processing Flaw Lets Remote Users Deny Service
SecurityTracker Alert ID:  1042080
SecurityTracker URL:
CVE Reference:   CVE-2018-14526   (Links to External Site)
Date:  Nov 12 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:   Oracle has issued a fix.

The Oracle Linux advisory is available at:

Vendor URL: (Links to External Site)
Cause:   Authentication error
Underlying OS:  Linux (Oracle)
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:  [El-errata] ELSA-2018-3107 Moderate: Oracle Linux 7 wpa_supplicant security and bug fix update

Oracle Linux Security Advisory ELSA-2018-3107

The following updated rpms for Oracle Linux 7 have been uploaded to the 
Unbreakable Linux Network:



Description of changes:

- Ignore unauthenticated encrypted EAPOL-Key data (CVE-2018-14526)

- Better handling of /run/wpa_supplicant (rh #1507919)

- Fix memory leak when macsec MKA/PSK is used (rh #1500442)
- Fix authentication failure when the MAC is updated externally (rh 
- Let the kernel discard EAPOL if packet type is PACKET_OTHERHOST (rh 
- Don't restart wpa_supplicant.service on package upgrade (rh #1505404)
- Don't own a directory in /run/ (rh #1507919)

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