RHEL 7 : httpd24-httpd (RHSA-2021:3754)

critical Nessus Plugin ID 154019
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 Red Hat host is missing a security update.


The remote Redhat Enterprise Linux 7 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2021:3754 advisory.

- httpd: mod_proxy: SSRF via a crafted request uri-path containing unix: (CVE-2021-40438)

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: Critical

ID: 154019

File Name: redhat-RHSA-2021-3754.nasl

Version: 1.2

Type: local

Agent: unix

Published: 10/12/2021

Updated: 10/12/2021

Dependencies: ssh_get_info.nasl, redhat_repos.nasl

Risk Information

CVSS Score Source: CVE-2021-40438


Risk Factor: Critical

Score: 10


Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5

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

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


Risk Factor: Critical

Base Score: 9

Temporal Score: 7.8

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

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

Vulnerability Information

CPE: cpe:/o:redhat:enterprise_linux:7, p-cpe:/a:redhat:enterprise_linux:httpd24-httpd, p-cpe:/a:redhat:enterprise_linux:httpd24-httpd-devel, p-cpe:/a:redhat:enterprise_linux:httpd24-httpd-manual, p-cpe:/a:redhat:enterprise_linux:httpd24-httpd-tools, p-cpe:/a:redhat:enterprise_linux:httpd24-mod_ldap, p-cpe:/a:redhat:enterprise_linux:httpd24-mod_proxy_html, p-cpe:/a:redhat:enterprise_linux:httpd24-mod_session, p-cpe:/a:redhat:enterprise_linux:httpd24-mod_ssl

Required KB Items: Host/local_checks_enabled, Host/RedHat/release, Host/RedHat/rpm-list, Host/cpu

Exploit Ease: No known exploits are available

Patch Publication Date: 10/11/2021

Vulnerability Publication Date: 9/16/2021

Reference Information

CVE: CVE-2021-40438

RHSA: 2021:3754

IAVA: 2021-A-0440

CWE: 918