CVE-2021-33193 Affecting apache2 package, versions <2.4.49-r0
Threat Intelligence
EPSS
0.13% (48th
percentile)
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Test your applications- Snyk ID SNYK-ALPINE318-APACHE2-5511445
- published 20 Sep 2021
- disclosed 16 Aug 2021
Introduced: 16 Aug 2021
CVE-2021-33193 Open this link in a new tabHow to fix?
Upgrade Alpine:3.18
apache2
to version 2.4.49-r0 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream apache2
package and not the apache2
package as distributed by Alpine
.
See How to fix?
for Alpine:3.18
relevant fixed versions and status.
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.
References
- https://security.netapp.com/advisory/ntap-20210917-0004/
- https://www.tenable.com/security/tns-2021-17
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/DSM6UWQICBJ2TU727RENU3HBKEAFLT6T/
- https://github.com/apache/httpd/commit/ecebcc035ccd8d0e2984fe41420d9e944f456b3c.patch
- https://portswigger.net/research/http2
- https://lists.apache.org/thread.html/re4162adc051c1a0a79e7a24093f3776373e8733abaff57253fef341d@%3Ccvs.httpd.apache.org%3E
- https://lists.apache.org/thread.html/ree7519d71415ecdd170ff1889cab552d71758d2ba2904a17ded21a70@%3Ccvs.httpd.apache.org%3E
- https://lists.debian.org/debian-lts-announce/2023/03/msg00002.html
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/EUVJVRJRBW5QVX4OY3NOHZDQ3B3YOTSG/
- https://security.gentoo.org/glsa/202208-20
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-apache-httpd-2.4.49-VWL69sWQ
- https://www.oracle.com/security-alerts/cpuapr2022.html
- https://www.oracle.com/security-alerts/cpujan2022.html
- 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://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/
CVSS Scores
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