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

medium Nessus Plugin ID 112071

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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?a9d4ec50

Plugin Details

Severity: Medium

ID: 112071

File Name: freebsd_pkg_45671c0ea65211e8805ba4badb2f4699.nasl

Version: 1.3

Type: local

Published: 8/23/2018

Updated: 11/10/2018

Configuration: Enable paranoid mode

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: Low

Base Score: 3.6

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

CVSS v3

Risk Factor: Medium

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, Settings/ParanoidReport, Host/FreeBSD/release, Host/FreeBSD/pkg_info

Patch Publication Date: 8/22/2018

Vulnerability Publication Date: 8/14/2018

Reference Information

CVE: CVE-2018-1452

FreeBSD: SA-18:11.hostapd