FreeBSD : Node.js -- February 2021 Security Releases (2f3cd69e-7dee-11eb-b92e-0022489ad614)

high Nessus Plugin ID 147558
New! Plugin Severity Now Using CVSS v3

The calculated severity for Plugins has been updated to use CVSS v3 by default. Plugins that do not have a CVSS v3 score will fall back to CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.


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


Node.js reports : HTTP2 'unknownProtocol' cause Denial of Service by resource exhaustion (Critical) (CVE-2021-22883) Affected Node.js versions are vulnerable to denial of service attacks when too many connection attempts with an 'unknownProtocol' are established. This leads to a leak of file descriptors. If a file descriptor limit is configured on the system, then the server is unable to accept new connections and prevent the process also from opening, e.g. a file. If no file descriptor limit is configured, then this lead to an excessive memory usage and cause the system to run out of memory. DNS rebinding in --inspect (CVE-2021-22884) Affected Node.js versions are vulnerable to a DNS rebinding attack when the whitelist includes 'localhost6'.
When 'localhost6' is not present in /etc/hosts, it is just an ordinary domain that is resolved via DNS, i.e., over network. If the attacker controls the victim's DNS server or can spoof its responses, the DNS rebinding protection can be bypassed by using the 'localhost6' domain.
As long as the attacker uses the 'localhost6' domain, they can still apply the attack described in CVE-2018-7160. OpenSSL - Integer overflow in CipherUpdate (CVE-2021-23840) This is a vulnerability in OpenSSL which may be exploited through Node.js. You can read more about it in


Update the affected packages.

See Also

Plugin Details

Severity: High

ID: 147558

File Name: freebsd_pkg_2f3cd69e7dee11ebb92e0022489ad614.nasl

Version: 1.7

Type: local

Published: 3/10/2021

Updated: 7/26/2021

Dependencies: ssh_get_info.nasl

Risk Information

CVSS Score Source: CVE-2021-22884


Risk Factor: Medium

Score: 6.7


Risk Factor: Medium

Base Score: 5.1

Temporal Score: 3.8

Vector: AV:N/AC:H/Au:N/C:P/I:P/A:P

Temporal Vector: E:U/RL:OF/RC:C


Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

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

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

Vulnerability Information

CPE: p-cpe:/a:freebsd:freebsd:node, p-cpe:/a:freebsd:freebsd:node10, p-cpe:/a:freebsd:freebsd:node12, p-cpe:/a:freebsd:freebsd:node14, 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: 3/9/2021

Vulnerability Publication Date: 2/23/2021

Reference Information

CVE: CVE-2021-22883, CVE-2021-22884, CVE-2021-23840

IAVB: 2021-B-0012-S