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Ubuntu 18.04 LTS / 20.04 LTS : strongSwan vulnerability (USN-5250-1)

critical Nessus Plugin ID 157057

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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-5250-1 advisory.

 Zhuowei Zhang discovered that stringSwan incorrectly handled EAP authentication. A remote attacker could use this issue to cause strongSwan to crash, resulting in a denial of service, or possibly bypass client and server authentication.

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 packages.

See Also

https://ubuntu.com/security/notices/USN-5250-1

Plugin Details

Severity: Critical

ID: 157057

File Name: ubuntu_USN-5250-1.nasl

Version: 1.8

Type: local

Agent: unix

Published: 1/25/2022

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: 6.0

CVSS v2

Risk Factor: Medium

Base Score: 5.8

Temporal Score: 4.3

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

CVSS Score Source: CVE-2021-45079

CVSS v3

Risk Factor: Critical

Base Score: 9.1

Temporal Score: 7.9

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

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

Vulnerability Information

CPE: cpe:/o:canonical:ubuntu_linux:20.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:strongswan, p-cpe:/a:canonical:ubuntu_linux:libstrongswan-standard-plugins, p-cpe:/a:canonical:ubuntu_linux:strongswan-nm, p-cpe:/a:canonical:ubuntu_linux:libcharon-extra-plugins, p-cpe:/a:canonical:ubuntu_linux:charon-cmd, cpe:/o:canonical:ubuntu_linux:18.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:libstrongswan, p-cpe:/a:canonical:ubuntu_linux:strongswan-libcharon, p-cpe:/a:canonical:ubuntu_linux:libcharon-standard-plugins, p-cpe:/a:canonical:ubuntu_linux:strongswan-tnc-ifmap, p-cpe:/a:canonical:ubuntu_linux:strongswan-tnc-base, p-cpe:/a:canonical:ubuntu_linux:strongswan-pki, p-cpe:/a:canonical:ubuntu_linux:strongswan-swanctl, p-cpe:/a:canonical:ubuntu_linux:libstrongswan-extra-plugins, p-cpe:/a:canonical:ubuntu_linux:strongswan-tnc-server, p-cpe:/a:canonical:ubuntu_linux:strongswan-tnc-pdp, p-cpe:/a:canonical:ubuntu_linux:strongswan-scepclient, p-cpe:/a:canonical:ubuntu_linux:libcharon-extauth-plugins, p-cpe:/a:canonical:ubuntu_linux:charon-systemd, p-cpe:/a:canonical:ubuntu_linux:strongswan-starter, p-cpe:/a:canonical:ubuntu_linux:strongswan-tnc-client, p-cpe:/a:canonical:ubuntu_linux:strongswan-charon

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

Exploit Ease: No known exploits are available

Patch Publication Date: 1/24/2022

Vulnerability Publication Date: 1/24/2022

Reference Information

CVE: CVE-2021-45079

USN: 5250-1