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Ubuntu 20.10 : c-ares vulnerability (USN-4638-1)

high Nessus Plugin ID 143120

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Synopsis

The remote Ubuntu host is missing a security update.

Description

The remote Ubuntu 20.10 host has packages installed that are affected by a vulnerability as referenced in the USN-4638-1 advisory.

 - A Node.js application that allows an attacker to trigger a DNS request for a host of their choice could trigger a Denial of Service in versions < 15.2.1, < 14.15.1, and < 12.19.1 by getting the application to resolve a DNS record with a larger number of responses. This is fixed in 15.2.1, 14.15.1, and 12.19.1.
 (CVE-2020-8277)

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 libc-ares-dev and / or libc-ares2 packages.

See Also

https://ubuntu.com/security/notices/USN-4638-1

Plugin Details

Severity: High

ID: 143120

File Name: ubuntu_USN-4638-1.nasl

Version: 1.5

Type: local

Agent: unix

Published: 11/19/2020

Updated: 1/17/2023

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

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

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

CVSS Score Source: CVE-2020-8277

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

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:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:canonical:ubuntu_linux:20.10, p-cpe:/a:canonical:ubuntu_linux:libc-ares-dev, p-cpe:/a:canonical:ubuntu_linux:libc-ares2

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

Exploit Ease: No known exploits are available

Patch Publication Date: 11/19/2020

Vulnerability Publication Date: 11/16/2020

Reference Information

CVE: CVE-2020-8277

USN: 4638-1