Detections
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Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS : websocket-extensions vulnerability (USN-4502-1)

high Nessus Plugin ID 140647

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Synopsis

The remote Ubuntu host is missing a security update.

Description

The remote Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS host has a package installed that is affected by a vulnerability as referenced in the USN-4502-1 advisory.

 It was discovered that websocket-extensions does not properly parse

 special headers. A remote attacker could use this issue to cause regex

 backtracking, resulting in a denial of service. (CVE-2020-7663)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Update the affected ruby-websocket-extensions package.

See Also

https://ubuntu.com/security/notices/USN-4502-1

Plugin Details

Severity: High

ID: 140647

File Name: ubuntu_USN-4502-1.nasl

Version: 1.5

Type: local

Agent: unix

Published: 9/17/2020

Updated: 8/27/2024

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

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.9

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

CVSS Score Source: CVE-2020-7663

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.7

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

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

Vulnerability Information

CPE: p-cpe:/a:canonical:ubuntu_linux:ruby-websocket-extensions, cpe:/o:canonical:ubuntu_linux:18.04:-:lts, cpe:/o:canonical:ubuntu_linux:20.04:-:lts, cpe:/o:canonical:ubuntu_linux:16.04:-:lts

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 9/16/2020

Vulnerability Publication Date: 6/2/2020

Reference Information

CVE: CVE-2020-7663

USN: 4502-1