Debian DSA-4450-1 : wpa - security update

medium Nessus Plugin ID 125414

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Synopsis

The remote Debian host is missing a security-related update.

Description

A vulnerability was found in the WPA protocol implementation found in wpa_supplication (station) and hostapd (access point).

The EAP-pwd implementation in hostapd (EAP server) and wpa_supplicant (EAP peer) doesn't properly validate fragmentation reassembly state when receiving an unexpected fragment. This could lead to a process crash due to a NULL pointer derefrence.

An attacker in radio range of a station or access point with EAP-pwd support could cause a crash of the relevant process (wpa_supplicant or hostapd), ensuring a denial of service.

Solution

Upgrade the wpa packages.

For the stable distribution (stretch), this problem has been fixed in version 2:2.4-1+deb9u4.

Plugin Details

Severity: Medium

ID: 125414

File Name: debian_DSA-4450.nasl

Version: 1.2

Type: local

Agent: unix

Family: Debian Local Security Checks

Published: 5/28/2019

Updated: 1/15/2020

Supported Sensors: Agentless Assessment, Frictionless Assessment Agent, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: Medium

Base Score: 4.3

Temporal Score: 3.2

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

CVSS v3

Risk Factor: Medium

Base Score: 5.9

Temporal Score: 5.2

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

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

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:wpa, cpe:/o:debian:debian_linux:9.0

Required KB Items: Host/local_checks_enabled, Host/Debian/release, Host/Debian/dpkg-l

Exploit Ease: No known exploits are available

Patch Publication Date: 5/24/2019

Vulnerability Publication Date: 4/26/2019

Reference Information

CVE: CVE-2019-11555

DSA: 4450

Detections

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