FreeBSD : rubygem-cgi -- HTTP response splitting vulnerability (84ab03b6-6c20-11ed-b519-080027f5fec9)

high Nessus Plugin ID 168188



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


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 84ab03b6-6c20-11ed-b519-080027f5fec9 advisory.

- The cgi gem before, 0.2.x before 0.2.2, and 0.3.x before 0.3.5 for Ruby allows HTTP response splitting. This is relevant to applications that use untrusted user input either to generate an HTTP response or to create a CGI::Cookie object. (CVE-2021-33621)

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


Update the affected packages.

See Also

Plugin Details

Severity: High

ID: 168188

File Name: freebsd_pkg_84ab03b66c2011edb519080027f5fec9.nasl

Version: 1.4

Type: local

Published: 11/25/2022

Updated: 9/20/2023

Supported Sensors: Nessus

Risk Information


Risk Factor: Medium

Score: 6.7


Risk Factor: High

Base Score: 9

Temporal Score: 7

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

CVSS Score Source: CVE-2021-33621


Risk Factor: High

Base Score: 8.8

Temporal Score: 7.9

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

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

Vulnerability Information

CPE: p-cpe:/a:freebsd:freebsd:ruby, p-cpe:/a:freebsd:freebsd:ruby27, p-cpe:/a:freebsd:freebsd:ruby30, p-cpe:/a:freebsd:freebsd:ruby31, p-cpe:/a:freebsd:freebsd:ruby32, p-cpe:/a:freebsd:freebsd:rubygem-cgi, 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: 11/24/2022

Vulnerability Publication Date: 11/18/2022

Reference Information

CVE: CVE-2021-33621