FreeBSD : texproc/expat2 -- billion laugh attack (5fa90ee6-bc9e-11eb-a287-e0d55e2a8bf9)

critical Nessus Plugin ID 149883

Synopsis

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

Description

Kurt Seifried reports :

So here are the CVE's for the two big ones, libxml2 and expat. Both are affected by the expansion of internal entities (which can be used to consume resources) and external entities (which can cause a denial of service against other services, be used to port scan, etc.).

A billion laughs attack is a type of denial-of-service attack which is aimed at parsers of XML documents.

Solution

Update the affected package.

Plugin Details

Severity: Critical

ID: 149883

File Name: freebsd_pkg_5fa90ee6bc9e11eba287e0d55e2a8bf9.nasl

Version: 1.3

Type: local

Family: FreeBSD Local Security Checks

Published: 5/25/2021

Updated: 12/29/2023

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.0

CVSS v2

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5.3

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

CVSS Score Source: CVE-2013-0340

CVSS v3

Risk Factor: Critical

Base Score: 9.1

Temporal Score: 8.2

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:P/RL:O/RC:C

Vulnerability Information

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

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 5/24/2021

Vulnerability Publication Date: 2/21/2013

Reference Information

CVE: CVE-2013-0340

Detections

Analytics