Detections
Analytics

FreeBSD : FreeBSD -- Insufficient packet length validation in libalias (30ce591c-947b-11ea-92ab-00163e433440)

critical Nessus Plugin ID 136535

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Synopsis

The remote FreeBSD host is missing one or more security-related updates.

Description

libalias(3) packet handlers do not properly validate the packet length before accessing the protocol headers. As a result, if a libalias(3) module does not properly validate the packet length before accessing the protocol header, it is possible for an out of bound read or write condition to occur. Impact : A malicious attacker could send specially constructed packets that exploit the lack of validation allowing the attacker to read or write memory either from the kernel (for the in-kernel NAT implementation) or from the process space for natd (for the userspace implementation).

Solution

Update the affected packages.

See Also

http://www.nessus.org/u?20972e0c

Plugin Details

Severity: Critical

ID: 136535

File Name: freebsd_pkg_30ce591c947b11ea92ab00163e433440.nasl

Version: 1.3

Type: local

Published: 5/13/2020

Updated: 5/19/2020

Configuration: Enable paranoid mode

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5.9

CVSS v2

Risk Factor: High

Base Score: 7.5

Temporal Score: 5.5

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

CVSS Score Source: CVE-2020-7454

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.5

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

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

Vulnerability Information

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

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

Exploit Ease: No known exploits are available

Patch Publication Date: 5/12/2020

Vulnerability Publication Date: 5/12/2020

Reference Information

CVE: CVE-2020-7454

FreeBSD: SA-20:12.libalias