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Ubuntu 14.04 LTS / 16.04 LTS / 18.04 LTS : wpa_supplicant and hostapd vulnerabilities (USN-3944-1)

high Nessus Plugin ID 123999

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Synopsis

The remote Ubuntu host is missing one or more security updates.

Description

It was discovered that wpa_supplicant and hostapd were vulnerable to a side channel attack against EAP-pwd. A remote attacker could possibly use this issue to recover certain passwords. (CVE-2019-9495)

Mathy Vanhoef discovered that wpa_supplicant and hostapd incorrectly validated received scalar and element values in EAP-pwd-Commit messages. A remote attacker could possibly use this issue to perform a reflection attack and authenticate without the appropriate password.
(CVE-2019-9497, CVE-2019-9498, CVE-2019-9499)

It was discovered that hostapd incorrectly handled obtaining random numbers. In rare cases where the urandom device isn't available, it would fall back to using a low-quality PRNG. This issue only affected Ubuntu 14.04 LTS and Ubuntu 16.04 LTS. (CVE-2016-10743).

Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Solution

Update the affected packages.

See Also

https://ubuntu.com/security/notices/USN-3944-1

Plugin Details

Severity: High

ID: 123999

File Name: ubuntu_USN-3944-1.nasl

Version: 1.8

Type: local

Agent: unix

Published: 4/11/2019

Updated: 10/20/2023

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

Risk Information

VPR

Risk Factor: Medium

Score: 5.9

CVSS v2

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5

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

CVSS Score Source: CVE-2019-9499

CVSS v3

Risk Factor: High

Base Score: 8.1

Temporal Score: 7.1

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

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

Vulnerability Information

CPE: p-cpe:/a:canonical:ubuntu_linux:hostapd, p-cpe:/a:canonical:ubuntu_linux:wpagui, p-cpe:/a:canonical:ubuntu_linux:wpasupplicant, p-cpe:/a:canonical:ubuntu_linux:wpasupplicant-udeb, cpe:/o:canonical:ubuntu_linux:14.04:-:lts, cpe:/o:canonical:ubuntu_linux:16.04:-:lts, cpe:/o:canonical:ubuntu_linux:18.04:-:lts

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

Exploit Ease: No known exploits are available

Patch Publication Date: 4/10/2019

Vulnerability Publication Date: 3/23/2019

Reference Information

CVE: CVE-2016-10743, CVE-2019-9495, CVE-2019-9497, CVE-2019-9498, CVE-2019-9499

USN: 3944-1