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Ubuntu 16.04 ESM / 18.04 LTS / 20.04 LTS : klibc vulnerabilities (USN-5379-1)

critical Nessus Plugin ID 159882

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Synopsis

The remote Ubuntu host is missing one or more security updates.

Description

The remote Ubuntu 14.04 LTS / 16.04 LTS / 18.04 LTS / 20.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-5379-1 advisory.

 - An issue was discovered in klibc before 2.0.9. Multiplication in the calloc() function may result in an integer overflow and a subsequent heap buffer overflow. (CVE-2021-31870)

 - An issue was discovered in klibc before 2.0.9. An integer overflow in the cpio command may result in a NULL pointer dereference on 64-bit systems. (CVE-2021-31871)

 - An issue was discovered in klibc before 2.0.9. Multiple possible integer overflows in the cpio command on 32-bit systems may result in a buffer overflow or other security impact. (CVE-2021-31872)

 - An issue was discovered in klibc before 2.0.9. Additions in the malloc() function may result in an integer overflow and a subsequent heap buffer overflow. (CVE-2021-31873)

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

Solution

Update the affected klibc-utils, libklibc and / or libklibc-dev packages.

See Also

https://ubuntu.com/security/notices/USN-5379-1

Plugin Details

Severity: Critical

ID: 159882

File Name: ubuntu_USN-5379-1.nasl

Version: 1.5

Type: local

Agent: unix

Published: 4/18/2022

Updated: 10/16/2023

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

Risk Information

VPR

Risk Factor: Medium

Score: 5.9

CVSS v2

Risk Factor: High

Base Score: 7.5

Temporal Score: 5.5

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

CVSS Score Source: CVE-2021-31873

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.5

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

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

Vulnerability Information

CPE: cpe:/o:canonical:ubuntu_linux:16.04:-:esm, cpe:/o:canonical:ubuntu_linux:18.04:-:lts, cpe:/o:canonical:ubuntu_linux:20.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:klibc-utils, p-cpe:/a:canonical:ubuntu_linux:libklibc, p-cpe:/a:canonical:ubuntu_linux:libklibc-dev

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

Exploit Ease: No known exploits are available

Patch Publication Date: 4/18/2022

Vulnerability Publication Date: 4/30/2021

Reference Information

CVE: CVE-2021-31870, CVE-2021-31871, CVE-2021-31872, CVE-2021-31873

USN: 5379-1