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Ubuntu 16.04 ESM : strongSwan vulnerability (USN-5111-2)

high Nessus Plugin ID 154242

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Synopsis

The remote Ubuntu host is missing a security update.

Description

The remote Ubuntu 16.04 LTS host has packages installed that are affected by a vulnerability as referenced in the USN-5111-2 advisory.

 - The in-memory certificate cache in strongSwan before 5.9.4 has a remote integer overflow upon receiving many requests with different certificates to fill the cache and later trigger the replacement of cache entries. The code attempts to select a less-often-used cache entry by means of a random number generator, but this is not done correctly. Remote code execution might be a slight possibility. (CVE-2021-41991)

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-5111-2

Plugin Details

Severity: High

ID: 154242

File Name: ubuntu_USN-5111-2.nasl

Version: 1.6

Type: local

Agent: unix

Published: 10/20/2021

Updated: 10/23/2023

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

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.9

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

CVSS Score Source: CVE-2021-41991

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.7

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:P/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:canonical:ubuntu_linux:strongswan-plugin-duplicheck, p-cpe:/a:canonical:ubuntu_linux:strongswan-plugin-eap-aka, p-cpe:/a:canonical:ubuntu_linux:strongswan-plugin-eap-aka-3gpp2, p-cpe:/a:canonical:ubuntu_linux:strongswan-plugin-eap-dynamic, p-cpe:/a:canonical:ubuntu_linux:strongswan-plugin-eap-gtc, p-cpe:/a:canonical:ubuntu_linux:strongswan-plugin-eap-md5, p-cpe:/a:canonical:ubuntu_linux:strongswan-plugin-eap-mschapv2, p-cpe:/a:canonical:ubuntu_linux:strongswan-plugin-eap-peap, p-cpe:/a:canonical:ubuntu_linux:strongswan-plugin-eap-radius, p-cpe:/a:canonical:ubuntu_linux:strongswan-plugin-eap-sim, p-cpe:/a:canonical:ubuntu_linux:strongswan-plugin-eap-sim-file, p-cpe:/a:canonical:ubuntu_linux:strongswan-plugin-eap-sim-pcsc, p-cpe:/a:canonical:ubuntu_linux:strongswan-plugin-eap-simaka-pseudonym, p-cpe:/a:canonical:ubuntu_linux:strongswan-plugin-eap-simaka-reauth, p-cpe:/a:canonical:ubuntu_linux:strongswan-plugin-eap-simaka-sql, p-cpe:/a:canonical:ubuntu_linux:strongswan-plugin-eap-tls, p-cpe:/a:canonical:ubuntu_linux:strongswan-plugin-eap-tnc, p-cpe:/a:canonical:ubuntu_linux:strongswan-plugin-eap-ttls, p-cpe:/a:canonical:ubuntu_linux:strongswan-plugin-error-notify, p-cpe:/a:canonical:ubuntu_linux:strongswan-plugin-farp, p-cpe:/a:canonical:ubuntu_linux:strongswan-plugin-fips-prf, p-cpe:/a:canonical:ubuntu_linux:strongswan-plugin-gcrypt, p-cpe:/a:canonical:ubuntu_linux:strongswan-starter, p-cpe:/a:canonical:ubuntu_linux:strongswan-tnc-base, p-cpe:/a:canonical:ubuntu_linux:strongswan-tnc-client, p-cpe:/a:canonical:ubuntu_linux:strongswan-tnc-ifmap, p-cpe:/a:canonical:ubuntu_linux:strongswan-tnc-pdp, p-cpe:/a:canonical:ubuntu_linux:strongswan-tnc-server, p-cpe:/a:canonical:ubuntu_linux:strongswan-plugin-gmp, p-cpe:/a:canonical:ubuntu_linux:strongswan-plugin-ipseckey, p-cpe:/a:canonical:ubuntu_linux:strongswan-plugin-ldap, p-cpe:/a:canonical:ubuntu_linux:strongswan-plugin-led, p-cpe:/a:canonical:ubuntu_linux:strongswan-plugin-load-tester, p-cpe:/a:canonical:ubuntu_linux:strongswan-plugin-lookip, p-cpe:/a:canonical:ubuntu_linux:strongswan-plugin-mysql, p-cpe:/a:canonical:ubuntu_linux:strongswan-plugin-ntru, p-cpe:/a:canonical:ubuntu_linux:strongswan-plugin-openssl, p-cpe:/a:canonical:ubuntu_linux:strongswan-plugin-pgp, p-cpe:/a:canonical:ubuntu_linux:strongswan-plugin-pkcs11, p-cpe:/a:canonical:ubuntu_linux:strongswan-plugin-pubkey, p-cpe:/a:canonical:ubuntu_linux:strongswan-plugin-radattr, p-cpe:/a:canonical:ubuntu_linux:strongswan-plugin-soup, p-cpe:/a:canonical:ubuntu_linux:strongswan-plugin-sql, p-cpe:/a:canonical:ubuntu_linux:strongswan-plugin-sqlite, p-cpe:/a:canonical:ubuntu_linux:strongswan-plugin-sshkey, p-cpe:/a:canonical:ubuntu_linux:strongswan-plugin-systime-fix, p-cpe:/a:canonical:ubuntu_linux:strongswan-plugin-unbound, p-cpe:/a:canonical:ubuntu_linux:strongswan-plugin-unity, p-cpe:/a:canonical:ubuntu_linux:strongswan-plugin-whitelist, p-cpe:/a:canonical:ubuntu_linux:strongswan-plugin-xauth-eap, p-cpe:/a:canonical:ubuntu_linux:strongswan-plugin-xauth-generic, p-cpe:/a:canonical:ubuntu_linux:strongswan-plugin-xauth-noauth, p-cpe:/a:canonical:ubuntu_linux:strongswan-plugin-xauth-pam, p-cpe:/a:canonical:ubuntu_linux:strongswan-pt-tls-client, cpe:/o:canonical:ubuntu_linux:16.04:-:esm, p-cpe:/a:canonical:ubuntu_linux:charon-cmd, p-cpe:/a:canonical:ubuntu_linux:libcharon-extra-plugins, p-cpe:/a:canonical:ubuntu_linux:libstrongswan, p-cpe:/a:canonical:ubuntu_linux:libstrongswan-extra-plugins, p-cpe:/a:canonical:ubuntu_linux:libstrongswan-standard-plugins, p-cpe:/a:canonical:ubuntu_linux:strongswan, p-cpe:/a:canonical:ubuntu_linux:strongswan-charon, p-cpe:/a:canonical:ubuntu_linux:strongswan-ike, p-cpe:/a:canonical:ubuntu_linux:strongswan-ikev1, p-cpe:/a:canonical:ubuntu_linux:strongswan-ikev2, p-cpe:/a:canonical:ubuntu_linux:strongswan-libcharon, p-cpe:/a:canonical:ubuntu_linux:strongswan-nm, p-cpe:/a:canonical:ubuntu_linux:strongswan-plugin-af-alg, p-cpe:/a:canonical:ubuntu_linux:strongswan-plugin-agent, p-cpe:/a:canonical:ubuntu_linux:strongswan-plugin-attr-sql, p-cpe:/a:canonical:ubuntu_linux:strongswan-plugin-certexpire, p-cpe:/a:canonical:ubuntu_linux:strongswan-plugin-coupling, p-cpe:/a:canonical:ubuntu_linux:strongswan-plugin-curl, p-cpe:/a:canonical:ubuntu_linux:strongswan-plugin-dhcp, p-cpe:/a:canonical:ubuntu_linux:strongswan-plugin-dnscert, p-cpe:/a:canonical:ubuntu_linux:strongswan-plugin-dnskey

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: 10/19/2021

Vulnerability Publication Date: 10/18/2021

Reference Information

CVE: CVE-2021-41991

USN: 5111-2