Debian DLA-973-1 : strongswan security update

high Nessus Plugin ID 100577

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Synopsis

The remote Debian host is missing a security update.

Description

Two denial of service vulnerabilities were identified in strongSwan, an IKE/IPsec suite, using Google's OSS-Fuzz fuzzing project.

CVE-2017-9022

RSA public keys passed to the gmp plugin aren't validated sufficiently before attempting signature verification, so that invalid input might lead to a floating point exception and crash of the process. A certificate with an appropriately prepared public key sent by a peer could be used for a denial of service attack.

CVE-2017-9023

ASN.1 CHOICE types are not correctly handled by the ASN.1 parser when parsing X.509 certificates with extensions that use such types. This could lead to infinite looping of the thread parsing a specifically crafted certificate.

For Debian 7 'Wheezy', these problems have been fixed in version 4.5.2-1.5+deb7u9.

We recommend that you upgrade your strongswan packages.

NOTE: Tenable Network Security has extracted the preceding description block directly from the DLA security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Solution

Upgrade the affected packages.

Plugin Details

Severity: High

ID: 100577

File Name: debian_DLA-973.nasl

Version: 3.8

Type: local

Agent: unix

Family: Debian Local Security Checks

Published: 6/2/2017

Updated: 1/11/2021

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

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

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

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

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:U/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:libstrongswan, p-cpe:/a:debian:debian_linux:strongswan, p-cpe:/a:debian:debian_linux:strongswan-dbg, p-cpe:/a:debian:debian_linux:strongswan-ikev1, p-cpe:/a:debian:debian_linux:strongswan-ikev2, p-cpe:/a:debian:debian_linux:strongswan-nm, p-cpe:/a:debian:debian_linux:strongswan-starter, cpe:/o:debian:debian_linux:7.0

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

Exploit Ease: No known exploits are available

Patch Publication Date: 6/1/2017

Reference Information

CVE: CVE-2017-9022, CVE-2017-9023

Detections

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