CVE-2021-40438
9.0 CRITICALA crafted request uri-path can cause mod_proxy to forward the request to an origin server choosen by the remote user
Published: 2021-09-16 · Last updated: 2026-06-17
Severity and scoring
- CVSS
- 9.0 CRITICAL
- Vector
- CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
- CWE
- CWE-918
Affected products
| Vendor | Product |
|---|---|
| apache | brocade_fabric_operating_system_firmware, cloud_backup, clustered_data_ontap |
| broadcom | brocade_fabric_operating_system_firmware, cloud_backup, clustered_data_ontap |
| debian | brocade_fabric_operating_system_firmware, cloud_backup, clustered_data_ontap |
| f5 | brocade_fabric_operating_system_firmware, cloud_backup, clustered_data_ontap |
| fedoraproject | brocade_fabric_operating_system_firmware, cloud_backup, clustered_data_ontap |
| netapp | brocade_fabric_operating_system_firmware, cloud_backup, clustered_data_ontap |
| oracle | brocade_fabric_operating_system_firmware, cloud_backup, clustered_data_ontap |
| redhat | brocade_fabric_operating_system_firmware, cloud_backup, clustered_data_ontap |
| resf | brocade_fabric_operating_system_firmware, cloud_backup, clustered_data_ontap |
| siemens | brocade_fabric_operating_system_firmware, cloud_backup, clustered_data_ontap |
| tenable | brocade_fabric_operating_system_firmware, cloud_backup, clustered_data_ontap |
Description
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.
Source: NVD
References
- [NVD]https://nvd.nist.gov/vuln/detail/CVE-2021-40438
- [Other]https://cert-portal.siemens.com/productcert/pdf/ssa-685781.pdf
- [Vendor advisory]https://httpd.apache.org/security/vulnerabilities_24.html
- [Other]https://lists.apache.org/thread.html/r210807d0bb55f4aa6fbe1512be6bcc4dacd64e84940429fba329967a%40%3Cusers.httpd.apache.org%3E
- [Other]https://lists.apache.org/thread.html/r2eb200ac1340f69aa22af61ab34780c531d110437910cb9c0ece3b37%40%3Cbugs.httpd.apache.org%3E
- [Other]https://lists.apache.org/thread.html/r3925e167d5eb1c75def3750c155d753064e1d34a143028bb32910432%40%3Cusers.httpd.apache.org%3E
- [Other]https://lists.apache.org/thread.html/r61fdbfc26ab170f4e6492ef3bd5197c20b862ce156e9d5a54d4b899c%40%3Cusers.httpd.apache.org%3E
- [Other]https://lists.apache.org/thread.html/r82838efc5fa6fc4c73986399c9b71573589f78b31846aff5bd9b1697%40%3Cusers.httpd.apache.org%3E
- [Other]https://lists.apache.org/thread.html/r82c077663f9759c7df5a6656f925b3ee4f55fcd33c889ba7cd687029%40%3Cusers.httpd.apache.org%3E
- [Other]https://lists.apache.org/thread.html/rf6954e60b1c8e480678ce3d02f61b8a788997785652e9557a3265c00%40%3Cusers.httpd.apache.org%3E
- [Other]https://lists.debian.org/debian-lts-announce/2021/10/msg00001.html
- [Other]https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SPBR6WUYBJNACHKE65SPL7TJOHX7RHWD/
- [Other]https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZNCYSR3BXT36FFF4XTCPL3HDQK4VP45R/
- [Other]https://security.gentoo.org/glsa/202208-20
- [Other]https://security.netapp.com/advisory/ntap-20211008-0004/
- [Other]https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-apache-httpd-2.4.49-VWL69sWQ
- [Other]https://www.debian.org/security/2021/dsa-4982
- [Patch]https://www.oracle.com/security-alerts/cpuapr2022.html
- [Patch]https://www.oracle.com/security-alerts/cpujan2022.html
- [Other]https://www.tenable.com/security/tns-2021-17
- [Other]https://cert-portal.siemens.com/productcert/pdf/ssa-685781.pdf
- [Vendor advisory]https://httpd.apache.org/security/vulnerabilities_24.html
- [Other]https://lists.apache.org/thread.html/r210807d0bb55f4aa6fbe1512be6bcc4dacd64e84940429fba329967a%40%3Cusers.httpd.apache.org%3E
- [Other]https://lists.apache.org/thread.html/r2eb200ac1340f69aa22af61ab34780c531d110437910cb9c0ece3b37%40%3Cbugs.httpd.apache.org%3E
- [Other]https://lists.apache.org/thread.html/r3925e167d5eb1c75def3750c155d753064e1d34a143028bb32910432%40%3Cusers.httpd.apache.org%3E
- [Other]https://lists.apache.org/thread.html/r61fdbfc26ab170f4e6492ef3bd5197c20b862ce156e9d5a54d4b899c%40%3Cusers.httpd.apache.org%3E
- [Other]https://lists.apache.org/thread.html/r82838efc5fa6fc4c73986399c9b71573589f78b31846aff5bd9b1697%40%3Cusers.httpd.apache.org%3E
- [Other]https://lists.apache.org/thread.html/r82c077663f9759c7df5a6656f925b3ee4f55fcd33c889ba7cd687029%40%3Cusers.httpd.apache.org%3E
- [Other]https://lists.apache.org/thread.html/rf6954e60b1c8e480678ce3d02f61b8a788997785652e9557a3265c00%40%3Cusers.httpd.apache.org%3E
- [Other]https://lists.debian.org/debian-lts-announce/2021/10/msg00001.html
- [Other]https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SPBR6WUYBJNACHKE65SPL7TJOHX7RHWD/
- [Other]https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZNCYSR3BXT36FFF4XTCPL3HDQK4VP45R/
- [Other]https://security.gentoo.org/glsa/202208-20
- [Other]https://security.netapp.com/advisory/ntap-20211008-0004/
- [Other]https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-apache-httpd-2.4.49-VWL69sWQ
- [Other]https://www.debian.org/security/2021/dsa-4982
- [Patch]https://www.oracle.com/security-alerts/cpuapr2022.html
- [Patch]https://www.oracle.com/security-alerts/cpujan2022.html
- [Other]https://www.tenable.com/security/tns-2021-17
- [Other]https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-40438
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