the ultimate security vulnerability data source
(e.g.: CVE-2009-1234 or 2010-1234 or 20101234)
Log In   Register
  Take a third party risk management course for FREE
Vulnerability Feeds & WidgetsNew  

Vulnerability Details : CVE-2021-40438

A crafted request uri-path can cause mod_proxy to forward the request to an origin server choosen by the remote user. This issue affects Apache HTTP Server 2.4.48 and earlier.
Publish Date : 2021-09-16 Last Update Date : 2022-10-05
Search Twitter   Search YouTube   Search Google

- CVSS Scores & Vulnerability Types

CVSS Score
Confidentiality Impact Partial (There is considerable informational disclosure.)
Integrity Impact Partial (Modification of some system files or information is possible, but the attacker does not have control over what can be modified, or the scope of what the attacker can affect is limited.)
Availability Impact Partial (There is reduced performance or interruptions in resource availability.)
Access Complexity Medium (The access conditions are somewhat specialized. Some preconditions must be satistified to exploit)
Authentication Not required (Authentication is not required to exploit the vulnerability.)
Gained Access None
Vulnerability Type(s)
CWE ID 918

- Related OVAL Definitions

Title Definition Id Class Family
RHSA-2021:3816: httpd:2.4 security update (Important) oval:com.redhat.rhsa:def:20213816 unix
RHSA-2021:3856: httpd security update (Important) oval:com.redhat.rhsa:def:20213856 unix
OVAL (Open Vulnerability and Assessment Language) definitions define exactly what should be done to verify a vulnerability or a missing patch. Check out the OVAL definitions if you want to learn what you should do to verify a vulnerability.

- Products Affected By CVE-2021-40438

# Product Type Vendor Product Version Update Edition Language
1 Application Apache Http Server * * * * Version Details Vulnerabilities
2 OS Debian Debian Linux 9.0 * * * Version Details Vulnerabilities
3 OS Debian Debian Linux 10.0 * * * Version Details Vulnerabilities
4 OS Debian Debian Linux 11.0 * * * Version Details Vulnerabilities
5 OS F5 F5os * * * * Version Details Vulnerabilities
6 OS Fedoraproject Fedora 34 * * * Version Details Vulnerabilities
7 OS Fedoraproject Fedora 35 * * * Version Details Vulnerabilities
8 Application Netapp Cloud Backup - * * * Version Details Vulnerabilities
9 Application Netapp Clustered Data Ontap - * * * Version Details Vulnerabilities
10 Application Netapp Storagegrid - * * * Version Details Vulnerabilities
11 Application Oracle Enterprise Manager Ops Center * * * Version Details Vulnerabilities
12 Application Oracle Http Server * * * Version Details Vulnerabilities
13 Application Oracle Http Server * * * Version Details Vulnerabilities
14 Application Oracle Instantis Enterprisetrack 17.1 * * * Version Details Vulnerabilities
15 Application Oracle Instantis Enterprisetrack 17.2 * * * Version Details Vulnerabilities
16 Application Oracle Instantis Enterprisetrack 17.3 * * * Version Details Vulnerabilities
17 Application Oracle Secure Global Desktop 5.6 * * * Version Details Vulnerabilities
18 Application Oracle Zfs Storage Appliance Kit 8.8 * * * Version Details Vulnerabilities
19 Application Siemens Sinec Nms * * * * Version Details Vulnerabilities
20 Application Siemens Sinema Server 14.0 - * * Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
Apache Http Server 1
Debian Debian Linux 3
F5 F5os 1
Fedoraproject Fedora 2
Netapp Cloud Backup 1
Netapp Clustered Data Ontap 1
Netapp Storagegrid 1
Oracle Enterprise Manager Ops Center 1
Oracle Http Server 2
Oracle Instantis Enterprisetrack 3
Oracle Secure Global Desktop 1
Oracle Zfs Storage Appliance Kit 1
Siemens Sinec Nms 1
Siemens Sinema Server 1

- References For CVE-2021-40438
GENTOO GLSA-202208-20[email protected]
MLIST [httpd-users] 20210923 Re: [[email protected]] Re: [External] : [[email protected]] 2.4.49 security fixes: more info CONFIRM[email protected]
MLIST [httpd-users] 20211019 [[email protected]] Regarding CVE-2021-40438
CISCO 20211124 Multiple Vulnerabilities in Apache HTTP Server Affecting Cisco Products: November 2021
DEBIAN DSA-4982[email protected]/message/SPBR6WUYBJNACHKE65SPL7TJOHX7RHWD/
FEDORA FEDORA-2021-dce7e7738e[email protected]
MLIST [httpd-bugs] 20211008 [Bug 65616] CVE-2021-36160 regression CONFIRM[email protected]
MLIST [httpd-users] 20211019 Re: [[email protected]] Regarding CVE-2021-40438[email protected]
MLIST [httpd-users] 20210923 [[email protected]] Re: [External] : [[email protected]] 2.4.49 security fixes: more info[email protected]/message/ZNCYSR3BXT36FFF4XTCPL3HDQK4VP45R/
FEDORA FEDORA-2021-e3f6dd670d[email protected]
MLIST [httpd-users] 20210923 Re: [[email protected]] 2.4.49 security fixes: more info CONFIRM[email protected]
MLIST [httpd-users] 20210923 [[email protected]] 2.4.49 security fixes: more info
MLIST [debian-lts-announce] 20211002 [SECURITY] [DLA 2776-1] apache2 security update

- Metasploit Modules Related To CVE-2021-40438

There are not any metasploit modules related to this CVE entry (Please visit for more information)

CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site. OVAL is a registered trademark of The MITRE Corporation and the authoritative source of OVAL content is MITRE's OVAL web site.
Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. It is the responsibility of user to evaluate the accuracy, completeness or usefulness of any information, opinion, advice or other content. EACH USER WILL BE SOLELY RESPONSIBLE FOR ANY consequences of his or her direct or indirect use of this web site. ALL WARRANTIES OF ANY KIND ARE EXPRESSLY DISCLAIMED. This site will NOT BE LIABLE FOR ANY DIRECT, INDIRECT or any other kind of loss.