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FreeBSD : libxml2 -- Possible denial of service (524bd03a-bb75-11eb-bf35-080027f515ea)

medium Nessus Plugin ID 149857

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Synopsis

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

Description

Daniel Veillard reports :

A flaw was found in libxml2. Exponential entity expansion attack its possible bypassing all existing protection mechanisms and leading to denial of service.

Solution

Update the affected package.

See Also

https://ubuntu.com/security/CVE-2021-3541

http://www.nessus.org/u?caef2a39

http://www.nessus.org/u?8c116525

Plugin Details

Severity: Medium

ID: 149857

File Name: freebsd_pkg_524bd03abb7511ebbf35080027f515ea.nasl

Version: 1.4

Type: local

Published: 5/24/2021

Updated: 7/14/2021

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: Medium

Base Score: 4

Temporal Score: 3

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

CVSS Score Source: CVE-2021-3541

CVSS v3

Risk Factor: Medium

Base Score: 6.5

Temporal Score: 5.7

Vector: CVSS:3.0/AV:N/AC:L/PR:L/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:freebsd:freebsd:libxml2, 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: 5/23/2021

Vulnerability Publication Date: 5/18/2021

Reference Information

CVE: CVE-2021-3541