CVE-2021-33193
- Source
- https://cve.org/CVERecord?id=CVE-2021-33193
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2021-33193.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/CVE-2021-33193
- Aliases
- Downstream
ALPINE (1)
ALSA (1)
AZL (1)
BELL (1)
CLEANSTART (1)
DEBIAN (1)
MGASA (1)
openSUSE (2)
RLSA (1)
UBUNTU (1)
- Related
- Published
- 2021-08-16T08:15:11Z
- Modified
- 2026-10-15T10:48:51Z
- Severity
-
- 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N CVSS Calculator
- Summary
- [none]
- Details
-
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.
- Database specific
{ "unresolved_ranges": [ { "cpes": [ "cpe:2.3:a:oracle:secure_backup:*:*:*:*:*:*:*:*" ], "extracted_events": [ { "range": [ { "fixed": "18.1.0.1.0" } ], "source": "CPE_RANGE" } ], "vendor_product": "oracle:secure_backup" }, { "cpes": [ "cpe:2.3:a:tenable:tenable.sc:*:*:*:*:*:*:*:*" ], "extracted_events": [ { "range": [ { "last_affected": "5.19.1" } ], "source": "CPE_RANGE" } ], "vendor_product": "tenable:tenable.sc" }, { "cpes": [ "cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*" ], "extracted_events": [ { "range": [ { "introduced": "10.0" }, { "last_affected": "10.0" } ], "source": "CPE_STRING" } ], "vendor_product": "debian:debian_linux" }, { "cpes": [ "cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*", "cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*" ], "extracted_events": [ { "range": [ { "introduced": "34" }, { "last_affected": "34" }, { "introduced": "35" }, { "last_affected": "35" } ], "source": "CPE_STRING" } ], "vendor_product": "fedoraproject:fedora" }, { "cpes": [ "cpe:2.3:a:oracle:zfs_storage_appliance_kit:8.8:*:*:*:*:*:*:*" ], "extracted_events": [ { "range": [ { "introduced": "8.8" }, { "last_affected": "8.8" } ], "source": "CPE_STRING" } ], "vendor_product": "oracle:zfs_storage_appliance_kit" } ] }- References
-
- https://lists.debian.org/debian-lts-announce/2023/03/msg00002.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DSM6UWQICBJ2TU727RENU3HBKEAFLT6T/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EUVJVRJRBW5QVX4OY3NOHZDQ3B3YOTSG/
- https://security.gentoo.org/glsa/202208-20
- https://security.netapp.com/advisory/ntap-20210917-0004/
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-apache-httpd-2.4.49-VWL69sWQ
- https://www.tenable.com/security/tns-2021-17
- https://github.com/apache/httpd/commit/ecebcc035ccd8d0e2984fe41420d9e944f456b3c.patch
- https://lists.apache.org/thread.html/re4162adc051c1a0a79e7a24093f3776373e8733abaff57253fef341d%40%3Ccvs.httpd.apache.org%3E
- https://lists.apache.org/thread.html/ree7519d71415ecdd170ff1889cab552d71758d2ba2904a17ded21a70%40%3Ccvs.httpd.apache.org%3E
- https://www.oracle.com/security-alerts/cpuapr2022.html
- https://www.oracle.com/security-alerts/cpujan2022.html
- https://portswigger.net/research/http2
Affected packages
Git / github.com/apache/httpd
Affected ranges
- Type
- GIT
- Repo
- https://github.com/apache/httpd
- Events
- Database specific
-
Show details
{ "extracted_events": [ { "cpe": "cpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:*", "range": [ { "introduced": "2.4.17" }, { "fixed": "2.4.49" } ], "source": "CPE_RANGE" }, { "range": [ { "fixed": "ecebcc035ccd8d0e2984fe41420d9e944f456b3c" } ], "source": "REFERENCES_COMMIT" } ] }