Permissions, Privileges, and Access Controls in hostapd and wpa_supplicant - CVE-2019-9498

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Main Vulnerability Database Vulnerabilities #VU23963

Permissions, Privileges, and Access Controls in hostapd and wpa_supplicant - CVE-2019-9498

Published: January 6, 2020


Vulnerability identifier: #VU23963
CSH Severity: High
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: CVE-2019-9498
CWE-ID: CWE-264
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vendor: Jouni Malinen
Affected software:
hostapd
wpa_supplicant

Detailed vulnerability description

The vulnerability allows a remote attacker to escalate privileges on the system.

The vulnerability exists due to the implementations of EAP-PWD in hostapd EAP Server, when built against a crypto library missing explicit validation on imported elements, do not validate the scalar and element values in EAP-pwd-Commit. A remote attacker can use invalid scalar/element values to complete authentication.

This vulnerability affects the following products:

  • hostapd with SAE support and wpa_supplicant with SAE support prior to and including version 2.4
  • hostapd with EAP-pwd support and wpa_supplicant with EAP-pwd support prior to and including version 2.7

How to mitigate CVE-2019-9498

Install updates from vendor's website.

Sources