FreeBSD : FreeBSD -- Unauthenticated EAPOL-Key Decryption Vulnerability (45671c0e-a652-11e8-805b-a4badb2f4699)

Low Nessus Plugin ID 112071

Synopsis

The remote FreeBSD host is missing one or more security-related updates.

Description

When using WPA2, EAPOL-Key frames with the Encrypted flag and without the MIC flag set, the data field was decrypted first without verifying the MIC. When the dta field was encrypted using RC4, for example, when negotiating TKIP as a pairwise cipher, the unauthenticated but decrypted data was subsequently processed. This opened wpa_supplicant(8) to abuse by decryption and recovery of sensitive information contained in EAPOL-Key messages.

See https://w1.fi/security/2018-1/unauthenticated-eapol-key-decryption.txt for a detailed description of the bug. Impact : All users of the WPA2 TKIP pairwise cipher are vulnerable to information, for example, the group key.

Solution

Update the affected packages.

See Also

http://www.nessus.org/u?c80d56ea

Plugin Details

Severity: Low

ID: 112071

File Name: freebsd_pkg_45671c0ea65211e8805ba4badb2f4699.nasl

Version: 1.2

Type: local

Published: 2018/08/23

Modified: 2018/08/31

Dependencies: 12634

Risk Information

Risk Factor: Low

CVSSv2

Base Score: 3.6

Vector: CVSS2#AV:L/AC:L/Au:N/C:N/I:P/A:P

CVSSv3

Base Score: 5.5

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

Vulnerability Information

CPE: p-cpe:/a:freebsd:freebsd:FreeBSD, cpe:/o:freebsd:freebsd

Required KB Items: Host/local_checks_enabled, Host/FreeBSD/release, Host/FreeBSD/pkg_info, Settings/ParanoidReport

Patch Publication Date: 2018/08/22

Vulnerability Publication Date: 2018/08/14

Reference Information

CVE: CVE-2018-1452

FreeBSD: SA-18:11.hostapd