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FreeBSD : strongswan - Insufficient input validation in RSASSA-PSS signature parser (6a449a37-1570-11e8-8e00-000c294a5758)

medium Nessus Plugin ID 107111

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Synopsis

The remote FreeBSD host is missing a security-related update.

Description

Strongswan Release Notes reports :

Fixed a DoS vulnerability in the parser for PKCS#1 RSASSA-PSS signatures that was caused by insufficient input validation. One of the configurable parameters in algorithm identifier structures for RSASSA-PSS signatures is the mask generation function (MGF). Only MGF1 is currently specified for this purpose. However, this in turn takes itself a parameter that specifies the underlying hash function.
strongSwan's parser did not correctly handle the case of this parameter being absent, causing an undefined data read. his vulnerability has been registered as CVE-2018-6459.

Solution

Update the affected package.

See Also

http://www.nessus.org/u?abbd5042

http://www.nessus.org/u?4c134768

Plugin Details

Severity: Medium

ID: 107111

File Name: freebsd_pkg_6a449a37157011e88e00000c294a5758.nasl

Version: 3.5

Type: local

Published: 3/2/2018

Updated: 10/27/2025

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Low

Score: 1.4

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 Score Source: CVE-2018-6459

CVSS v3

Risk Factor: Medium

Base Score: 5.3

Temporal Score: 4.6

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

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

Vulnerability Information

CPE: p-cpe:/a:freebsd:freebsd:strongswan, cpe:/o:freebsd:freebsd

Required KB Items: Host/local_checks_enabled, Host/FreeBSD/release, Host/FreeBSD/pkg_info

Exploit Ease: No known exploits are available

Patch Publication Date: 2/19/2018

Vulnerability Publication Date: 1/31/2018

Reference Information

CVE: CVE-2018-6459