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Ubuntu 20.04 ESM : Olm vulnerability (USN-5194-1)

critical Nessus Plugin ID 183525

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Synopsis

The remote Ubuntu host is missing a security update.

Description

The remote Ubuntu 20.04 ESM host has packages installed that are affected by a vulnerability as referenced in the USN-5194-1 advisory.

 Denis Kasak discovered that Olm was not verifying the length of input being processed by the olm_pk_decrypt module, which introduced a stack-based buffer overflow vulnerability to the library. An attacker could use this to cause a denial of service (application crash) or possibly execute arbitrary code.

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 libolm-dev, libolm3 and / or python3-olm packages.

See Also

https://ubuntu.com/security/notices/USN-5194-1

Plugin Details

Severity: Critical

ID: 183525

File Name: ubuntu_USN-5194-1.nasl

Version: 1.1

Type: local

Agent: unix

Published: 10/20/2023

Updated: 8/27/2024

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

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: High

Base Score: 7.5

Temporal Score: 5.9

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

CVSS Score Source: CVE-2021-34813

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.8

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:P/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:canonical:ubuntu_linux:libolm3, p-cpe:/a:canonical:ubuntu_linux:libolm-dev, p-cpe:/a:canonical:ubuntu_linux:python3-olm, cpe:/o:canonical:ubuntu_linux:20.04:-:esm

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: 12/15/2021

Vulnerability Publication Date: 6/16/2021

Reference Information

CVE: CVE-2021-34813

USN: 5194-1