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FreeBSD : varnish -- HTTP/2 Rapid Reset Attack (f25a34b1-910d-11ee-a1a2-641c67a117d8)

high Nessus Plugin ID 186521

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Synopsis

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

Description

The version of FreeBSD installed on the remote host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the f25a34b1-910d-11ee-a1a2-641c67a117d8 advisory.

 - The HTTP/2 protocol allows a denial of service (server resource consumption) because request cancellation can reset many streams quickly, as exploited in the wild in August through October 2023. (CVE-2023-44487)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Update the affected packages.

See Also

https://varnish-cache.org/security/VSV00013.html

http://www.nessus.org/u?026b7100

Plugin Details

Severity: High

ID: 186521

File Name: freebsd_pkg_f25a34b1910d11eea1a2641c67a117d8.nasl

Version: 1.1

Type: local

Published: 12/2/2023

Updated: 2/9/2024

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.1

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 6.4

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

CVSS Score Source: CVE-2023-44487

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 7

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:F/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:freebsd:freebsd:varnish6, p-cpe:/a:freebsd:freebsd:varnish7, 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: 12/2/2023

Vulnerability Publication Date: 10/10/2023

CISA Known Exploited Vulnerability Due Dates: 10/31/2023

Reference Information

CVE: CVE-2023-44487