CVE-2021-33193
Summary
| CVE | CVE-2021-33193 |
|---|---|
| State | PUBLIC |
| Assigner | [email protected] |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2021-08-16 08:15:00 UTC |
| Updated | 2023-11-07 03:35:00 UTC |
| Description | A crafted method sent through HTTP/2 will bypass validation and be forwarded by mod_proxy, which can lead to request splitting or cache poisoning. This issue affects Apache HTTP Server 2.4.17 to 2.4.48. |
Risk And Classification
Problem Types: NVD-CWE-Other
NVD Known Affected Configurations (CPE 2.3)
| Type | Vendor | Product | Version | Update | Edition | Language |
|---|---|---|---|---|---|---|
| Application | Apache | Http Server | All | All | All | All |
| Operating System | Fedoraproject | Fedora | 34 | All | All | All |
| Operating System | Fedoraproject | Fedora | 35 | All | All | All |
| Application | Oracle | Secure Backup | All | All | All | All |
| Application | Oracle | Zfs Storage Appliance Kit | 8.8 | All | All | All |
| Application | Tenable | Tenable.sc | All | All | All | All |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| Apache HTTPD: Multiple Vulnerabilities (GLSA 202208-20) — Gentoo security | GENTOO | security.gentoo.org | |
| [R1] Stand-alone Security Patch Available for Tenable.sc versions 5.16.0 to 5.19.1: Patch 202110.1 - Security Advisory | Tenable® | CONFIRM | www.tenable.com | |
| [SECURITY] Fedora 34 Update: httpd-2.4.50-1.fc34 - package-announce - Fedora Mailing-Lists | lists.fedoraproject.org | ||
| [SECURITY] Fedora 35 Update: httpd-2.4.50-1.fc35 - package-announce - Fedora Mailing-Lists | FEDORA | lists.fedoraproject.org | |
| Oracle Critical Patch Update Advisory - April 2022 | MISC | www.oracle.com | |
| CVE-2021-33193 Apache HTTP Server Vulnerability in NetApp Products | NetApp Product Security | CONFIRM | security.netapp.com | |
| Pony Mail! | MLIST | lists.apache.org | |
| Pony Mail! | MLIST | lists.apache.org | |
| [SECURITY] Fedora 35 Update: httpd-2.4.50-1.fc35 - package-announce - Fedora Mailing-Lists | lists.fedoraproject.org | ||
| [httpd-cvs] 20210916 [httpd-site] branch main updated: Add descriptions for CVE-2021-33193 CVE-2021-36160 | lists.apache.org | ||
| Oracle Critical Patch Update Advisory - January 2022 | MISC | www.oracle.com | |
| Multiple Vulnerabilities in Apache HTTP Server Affecting Cisco Products: November 2021 | CISCO | tools.cisco.com | |
| github.com/apache/httpd/commit/ecebcc035ccd8d0e2984fe41420d9e944f456b3c.... | MISC | github.com | |
| [SECURITY] [DLA 3351-1] apache2 security update | MLIST | lists.debian.org | |
| HTTP/2: The Sequel is Always Worse | PortSwigger Research | MISC | portswigger.net | |
| FEDORA-2021-5d2d4b6ac5 | FEDORA | lists.fedoraproject.org | |
| [httpd-cvs] 20210916 [httpd-site] branch main updated: Revert "Add descriptions for CVE-2021-33193 CVE-2021-36160" | lists.apache.org | ||
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
Vendor Comments And Credit
Discovery Credit
LEGACY: Reported by James Kettle of PortSwigger
Legacy QID Mappings
- 150400 Apache HTTP Server HTTP/2 Method injection (CVE-2021-33193)
- 159756 Oracle Enterprise Linux Security Update for httpd:2.4 (ELSA-2022-9276)
- 159811 Oracle Enterprise Linux Security Update for httpd:2.4 (ELSA-2022-1915)
- 180051 Debian Security Update for apache2 (CVE-2021-33193)
- 181620 Debian Security Update for apache2 (DLA 3351-1)
- 198516 Ubuntu Security Notification for Apache Hypertext Transfer Protocol (HTTP) Server Vulnerabilities (USN-5090-1)
- 240307 Red Hat Update for httpd:2.4 (RHSA-2022:1915)
- 240698 Red Hat Update for httpd24-httpd (RHSA-2022:6753)
- 240794 Red Hat Update for JBoss Core Services (RHSA-2022:7143)
- 281962 Fedora Security Update for httpd (FEDORA-2021-5d2d4b6ac5)
- 352857 Amazon Linux Security Advisory for httpd24: ALAS-2021-1543
- 352858 Amazon Linux Security Advisory for httpd: ALAS2-2021-1716
- 38856 Cisco TelePresence Video Communication Server (VCS) Apache HTTP Server Vulnerability (cisco-sa-apache-httpd-2.4.49-VWL69sWQ)
- 500022 Alpine Linux Security Update for apache2
- 503713 Alpine Linux Security Update for apache2
- 690025 Free Berkeley Software Distribution (FreeBSD) Security Update for apache httpd (882a38f9-17dd-11ec-b335-d4c9ef517024)
- 710595 Gentoo Linux Apache HTTPD Multiple Vulnerabilities (GLSA 202208-20)
- 730210 Apache Hypertext Transfer Protocol Server (HTTP Server) HTTP/2 Method Injection Vulnerability
- 751086 SUSE Enterprise Linux Security Update for apache2 (SUSE-SU-2021:2918-1)
- 751092 OpenSUSE Security Update for apache2 (openSUSE-SU-2021:2954-1)
- 751110 OpenSUSE Security Update for apache2 (openSUSE-SU-2021:1234-1)
- 751216 SUSE Enterprise Linux Security Update for apache2 (SUSE-SU-2021:3335-1)
- 900317 CBL-Mariner Linux Security Update for httpd 2.4.46
- 901612 Common Base Linux Mariner (CBL-Mariner) Security Update for httpd (6483-1)
- 902851 Common Base Linux Mariner (CBL-Mariner) Security Update for httpd (5420)
- 940509 AlmaLinux Security Update for httpd:2.4 (ALSA-2022:1915)
- 960327 Rocky Linux Security Update for httpd:2.4 (RLSA-2022:1915)