Ubuntu 20.04 LTS : UltraJSON vulnerability (USN-6629-2)

medium Nessus Plugin ID 190520


The remote Ubuntu host is missing a security update.


The remote Ubuntu 20.04 LTS host has a package installed that is affected by a vulnerability as referenced in the USN-6629-2 advisory.

- UltraJSON (aka ujson) through 5.1.0 has a stack-based buffer overflow in Buffer_AppendIndentUnchecked (called from encode). Exploitation can, for example, use a large amount of indentation. (CVE-2021-45958)

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


Update the affected python3-ujson package.

See Also


Plugin Details

Severity: Medium

ID: 190520

File Name: ubuntu_USN-6629-2.nasl

Version: 1.0

Type: local

Agent: unix

Published: 2/14/2024

Updated: 2/14/2024

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

Risk Information


Risk Factor: Medium

Score: 4.4


Risk Factor: Medium

Base Score: 4.3

Temporal Score: 3.4

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

CVSS Score Source: CVE-2021-45958


Risk Factor: Medium

Base Score: 5.5

Temporal Score: 5

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

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

Vulnerability Information

CPE: cpe:/o:canonical:ubuntu_linux:20.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:python3-ujson

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: 2/14/2024

Vulnerability Publication Date: 1/1/2022

Reference Information

CVE: CVE-2021-45958

USN: 6629-2