FreeBSD : FreeBSD -- EAP-pwd side-channel attack (60129efe-656d-11e9-8e67-206a8a720317)

low Nessus Plugin ID 124221

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Synopsis

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

Description

Potential side channel attacks in the SAE implementations used by both hostapd and wpa_supplicant (see CVE-2019-9494 and VU#871675). EAP-pwd uses a similar design for deriving PWE from the password and while a specific attack against EAP-pwd is not yet known to be tested, there is no reason to believe that the EAP-pwd implementation would be immune against the type of cache attack that was identified for the SAE implementation. Since the EAP-pwd implementation in hostapd (EAP server) and wpa_supplicant (EAP peer) does not support MODP groups, the timing attack described against SAE is not applicable for the EAP-pwd implementation.

See https://w1.fi/security/2019-2/eap-pwd-side-channel-attack.txt for a detailed description of the bug. Impact : All wpa_supplicant and hostapd versions with EAP-pwd support (CONFIG_EAP_PWD=y in the build configuration and EAP-pwd being enabled in the runtime configuration).

Solution

Update the affected packages.

Plugin Details

Severity: Low

ID: 124221

File Name: freebsd_pkg_60129efe656d11e98e67206a8a720317.nasl

Version: 1.2

Type: local

Family: FreeBSD Local Security Checks

Published: 4/23/2019

Updated: 1/23/2020

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Low

Score: 2.2

CVSS v2

Risk Factor: Medium

Base Score: 4.3

Temporal Score: 3.2

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

CVSS v3

Risk Factor: Low

Base Score: 3.7

Temporal Score: 3.2

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

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:freebsd:freebsd:hostapd, p-cpe:/a:freebsd:freebsd:wpa_supplicant, cpe:/o:freebsd:freebsd

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

Exploit Ease: No known exploits are available

Patch Publication Date: 4/23/2019

Vulnerability Publication Date: 4/10/2019

Reference Information

CVE: CVE-2019-9495

Detections

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