CVE-2019-9494

Impact:
Important
Public Date:
2019-04-10
CWE:
CWE-385
Bugzilla:
1699141: CVE-2019-9494 wpa_supplicant: SAE Timing-based and Cache-based side-channel attack against WPA3's Dragonfly handshake

The MITRE CVE dictionary describes this issue as:

The implementations of SAE in hostapd and wpa_supplicant are vulnerable to side channel attacks as a result of observable timing differences and cache access patterns. An attacker may be able to gain leaked information from a side channel attack that can be used for full password recovery. Both hostapd with SAE support and wpa_supplicant with SAE support prior to and including version 2.7 are affected.

Find out more about CVE-2019-9494 from the MITRE CVE dictionary dictionary and NIST NVD.

Statement

This issue did not affect the versions of wpa_supplicant as shipped with Red Hat Enterprise Linux 5, 6 as they did not include support for SAE (Simultaneous
Authentication of Equals).

This issue did not affect the versions of wpa_supplicant as shipped with Red Hat Enterprise Linux 7 as they are not compiled with SAE (Simultaneous
Authentication of Equals) enabled. In particular, the CONFIG_SAE=y option is not set at compile time.

CVSS v3 metrics

NOTE: The following CVSS v3 metrics and score provided are preliminary and subject to review.

CVSS3 Base Score 7.5
CVSS3 Base Metrics CVSS:3.0/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector Adjacent Network
Attack Complexity High
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality High
Integrity Impact High
Availability Impact High

Affected Packages State

Platform Package State
Red Hat Virtualization 4 rhvm-appliance Not affected
Red Hat Virtualization 4 redhat-virtualization-host Not affected
Red Hat Enterprise Linux 8 wpa_supplicant Not affected
Red Hat Enterprise Linux 7 wpa_supplicant Not affected
Red Hat Enterprise Linux 6 wpa_supplicant Not affected
Red Hat Enterprise Linux 5 wpa_supplicant Not affected
Unless explicitly stated as not affected, all previous versions of packages in any minor update stream of a product listed here should be assumed vulnerable, although may not have been subject to full analysis.

Acknowledgements

Red Hat would like to thank Mathy Vanhoef (NYUAD) and Eyal Ronen (Tel Aviv University & KU Leuven) for reporting this issue.

External References

Last Modified

CVE description copyright © 2017, The MITRE Corporation