Ubuntu 18.04 LTS / 20.04 LTS : NSS vulnerability (USN-5410-1)

high Nessus Plugin ID 161025

Synopsis

The remote Ubuntu host is missing a security update.

Description

The remote Ubuntu 18.04 LTS / 20.04 LTS host has packages installed that are affected by a vulnerability as referenced in the USN-5410-1 advisory.

- A flaw was found in the way NSS handled CCS (ChangeCipherSpec) messages in TLS 1.3. This flaw allows a remote attacker to send multiple CCS messages, causing a denial of service for servers compiled with the NSS library. The highest threat from this vulnerability is to system availability. This flaw affects NSS versions before 3.58. (CVE-2020-25648)

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 libnss3, libnss3-dev and / or libnss3-tools packages.

See Also

https://ubuntu.com/security/notices/USN-5410-1

Plugin Details

Severity: High

ID: 161025

File Name: ubuntu_USN-5410-1.nasl

Version: 1.2

Type: local

Agent: unix

Published: 5/11/2022

Updated: 5/11/2022

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

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

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

Temporal Vector: CVSS2#E:U/RL:OF/RC:C

CVSS Score Source: CVE-2020-25648

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:2.3:o:canonical:ubuntu_linux:18.04:-:lts:*:*:*:*:*, cpe:2.3:o:canonical:ubuntu_linux:20.04:-:lts:*:*:*:*:*, p-cpe:2.3:a:canonical:ubuntu_linux:libnss3:*:*:*:*:*:*:*, p-cpe:2.3:a:canonical:ubuntu_linux:libnss3-dev:*:*:*:*:*:*:*, p-cpe:2.3:a:canonical:ubuntu_linux:libnss3-tools:*:*:*:*:*:*:*

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

Exploit Ease: No known exploits are available

Patch Publication Date: 5/11/2022

Vulnerability Publication Date: 10/20/2020

Reference Information

CVE: CVE-2020-25648

USN: 5410-1