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FreeBSD : nghttp2 -- DoS vulnerability (4bb56d2f-a5b0-11ea-a860-08002728f74c)

high Nessus Plugin ID 137126

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Synopsis

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

Description

nghttp2 security advisories :

The overly large HTTP/2 SETTINGS frame payload causes denial of service.

The proof of concept attack involves a malicious client constructing a SETTINGS frame with a length of 14,400 bytes (2400 individual settings entries) over and over again. The attack causes the CPU to spike at 100%.

Solution

Update the affected packages.

See Also

http://www.nessus.org/u?30f4e11a

http://www.nessus.org/u?6a1152c9

Plugin Details

Severity: High

ID: 137126

File Name: freebsd_pkg_4bb56d2fa5b011eaa86008002728f74c.nasl

Version: 1.4

Type: local

Published: 6/4/2020

Updated: 12/5/2022

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.6

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-2020-11080

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

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

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

Vulnerability Information

CPE: cpe:/o:freebsd:freebsd, p-cpe:/a:freebsd:freebsd:libnghttp2, p-cpe:/a:freebsd:freebsd:nghttp2

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

Exploit Ease: No known exploits are available

Patch Publication Date: 6/3/2020

Vulnerability Publication Date: 6/2/2020

Reference Information

CVE: CVE-2020-11080