Debian DLA-2334-1 : ruby-websocket-extensions security update

high Nessus Plugin ID 139703

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Synopsis

The remote Debian host is missing a security update.

Description

It was discovered that there was a denial of service vulnerability in ruby-websocket-extensions, a library for managing long-lived HTTP 'WebSocket' connections.

The parser took quadratic time when parsing a header containing an unclosed string parameter value whose content is a repeating two-byte sequence. This could be abused by an attacker to conduct a Regex Denial Of Service (ReDoS) on a single-threaded server by providing a malicious payload in the Sec-WebSocket-Extensions HTTP header.

For Debian 9 'Stretch', this problem has been fixed in version 0.1.2-1+deb9u1.

We recommend that you upgrade your ruby-websocket-extensions packages.

For the detailed security status of ruby-websocket-extensions please refer to its security tracker page at:
https://security-tracker.debian.org/tracker/ruby-websocket-extensions

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

Solution

Upgrade the affected ruby-websocket-extensions package.

Plugin Details

Severity: High

ID: 139703

File Name: debian_DLA-2334.nasl

Version: 1.3

Type: local

Agent: unix

Family: Debian Local Security Checks

Published: 8/20/2020

Updated: 2/23/2024

Supported Sensors: Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Continuous Assessment, 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:debian:debian_linux:ruby-websocket-extensions, cpe:/o:debian:debian_linux:9.0

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 8/19/2020

Vulnerability Publication Date: 6/2/2020

Reference Information

CVE: CVE-2020-7663

Detections

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