CVE-2019-9497

Impact:
Moderate
Public Date:
2019-04-10
CWE:
CWE-287
Bugzilla:
1699164: CVE-2019-9497 wpa_supplicant: EAP-pwd server not checking for reflection attack

The MITRE CVE dictionary describes this issue as:

The implementations of EAP-PWD in hostapd EAP Server and wpa_supplicant EAP Peer do not validate the scalar and element values in EAP-pwd-Commit. This vulnerability may allow an attacker to complete EAP-PWD authentication without knowing the password. However, unless the crypto library does not implement additional checks for the EC point, the attacker will not be able to derive the session key or complete the key exchange. Both hostapd with SAE support and wpa_supplicant with SAE support prior to and including version 2.4 are affected. 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-2019-9497 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 4.3
CVSS3 Base Metrics CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Attack Vector Adjacent Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality None
Integrity Impact Low
Availability Impact None

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