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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.

 c-ares could be made to denial of service if it received a specially crafted DNS request.

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 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: 1.6

Type: local

Agent: unix

Published: 11/19/2020

Updated: 8/27/2024

Supported Sensors: Frictionless Assessment AWS, Frictionless Assessment Azure, Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Continuous Assessment, 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: p-cpe:/a:canonical:ubuntu_linux:libc-ares2, cpe:/o:canonical:ubuntu_linux:20.10, p-cpe:/a:canonical:ubuntu_linux:libc-ares-dev

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

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