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

Medium Nessus Plugin ID 107111

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: 3.4

Type: local

Published: 2018/03/02

Modified: 2018/11/10

Dependencies: 12634

Risk Information

Risk Factor: Medium

CVSS v2.0

Base Score: 5

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

CVSS v3.0

Base Score: 5.3

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

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

Patch Publication Date: 2018/02/19

Vulnerability Publication Date: 2018/01/31

Reference Information

CVE: CVE-2018-6459