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CVE-2021-40438

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Date: September 16, 2021

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.

Language: C

Severity Score

Related Resources (25)

https://cert-portal.siemens.com/productcert/pdf/ssa-685781.pdf
https://security.alpinelinux.org/vuln/CVE-2021-40438
https://www.debian.org/security/2021/dsa-4982
https://httpd.apache.org/security/vulnerabilities_24.html
https://lists.apache.org/thread.html/r210807d0bb55f4aa6fbe1512be6bcc4dacd64e84940429fba329967a@%3Cusers.httpd.apache.org%3E
https://access.redhat.com/security/cve/CVE-2021-40438
https://lists.debian.org/debian-lts-announce/2021/10/msg00001.html
https://security.netapp.com/advisory/ntap-20211008-0004/
https://www.tenable.com/security/tns-2021-17
https://nvd.nist.gov/vuln/detail/CVE-2021-40438
https://lists.apache.org/thread.html/r61fdbfc26ab170f4e6492ef3bd5197c20b862ce156e9d5a54d4b899c@%3Cusers.httpd.apache.org%3E
https://people.canonical.com/~ubuntu-security/cve/CVE-2021-40438
https://lists.apache.org/thread.html/r3925e167d5eb1c75def3750c155d753064e1d34a143028bb32910432@%3Cusers.httpd.apache.org%3E
https://www.oracle.com/security-alerts/cpujan2022.html
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-apache-httpd-2.4.49-VWL69sWQ
https://lists.apache.org/thread.html/r2eb200ac1340f69aa22af61ab34780c531d110437910cb9c0ece3b37@%3Cbugs.httpd.apache.org%3E
https://security-tracker.debian.org/tracker/CVE-2021-40438
https://lists.apache.org/thread.html/r82838efc5fa6fc4c73986399c9b71573589f78b31846aff5bd9b1697@%3Cusers.httpd.apache.org%3E
https://www.oracle.com/security-alerts/cpuapr2022.html
https://security.gentoo.org/glsa/202208-20
https://lists.apache.org/thread.html/r82c077663f9759c7df5a6656f925b3ee4f55fcd33c889ba7cd687029@%3Cusers.httpd.apache.org%3E
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ZNCYSR3BXT36FFF4XTCPL3HDQK4VP45R/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/SPBR6WUYBJNACHKE65SPL7TJOHX7RHWD/
https://lists.apache.org/thread.html/rf6954e60b1c8e480678ce3d02f61b8a788997785652e9557a3265c00@%3Cusers.httpd.apache.org%3E
https://www.mend.io/vulnerability-database/CVE-2021-40438

Severity Score

Weakness Type (CWE)

Server-Side Request Forgery (SSRF)

CWE-918

Top Fix

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Upgrade Version

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CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): HIGH
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): CHANGED
Confidentiality (C): HIGH
Integrity (I): HIGH
Availability (A): HIGH

CVSS v2

Base Score:
Access Vector (AV): NETWORK
Access Complexity (AC): MEDIUM
Authentication (AU): NONE
Confidentiality (C): PARTIAL
Integrity (I): PARTIAL
Availability (A): PARTIAL
Additional information:

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