CVE-2019-9495

Impact:
Important
Public Date:
2019-04-10
CWE:
CWE-203
Bugzilla:
1699149: CVE-2019-9495 wpa_supplicant: EAP-pwd cache side-channel attack

The MITRE CVE dictionary describes this issue as:

The implementations of EAP-PWD in hostapd and wpa_supplicant are vulnerable to side-channel attacks as a result of cache access patterns. All versions of hostapd and wpa_supplicant with EAP-PWD support are vulnerable. The ability to install and execute applications is necessary for a successful attack. Memory access patterns are visible in a shared cache. Weak passwords may be cracked. Versions of hostapd/wpa_supplicant 2.7 and newer, are not vulnerable to the timing attack described in CVE-2019-9494. Both hostapd with EAP-pwd support and wpa_supplicant with EAP-pwd support prior to and including version 2.7 are affected.

Find out more about CVE-2019-9495 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 EAP-pwd.

This issue did not affect the versions of wpa_supplicant as shipped with Red Hat Enterprise Linux 7 as they are not compiled with EAP-pwd enabled. In particular, the CONFIG_EAP_PWD=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

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