CVE-2019-17567

mod_proxy_wstunnel tunneling of non Upgraded connections

Description

Apache HTTP Server versions 2.4.6 to 2.4.46 mod_proxy_wstunnel configured on an URL that is not necessarily Upgraded by the origin server was tunneling the whole connection regardless, thus allowing for subsequent requests on the same connection to pass through with no HTTP validation, authentication or authorization possibly configured.

Category

5.3
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 11.58% Top 10%
Vendor Advisory gentoo.org Vendor Advisory fedoraproject.org Vendor Advisory fedoraproject.org Vendor Advisory apache.org Vendor Advisory apache.org
Affected: Apache Software Foundation Apache HTTP Server
Published at:
Updated at:

References

Link Tags
http://httpd.apache.org/security/vulnerabilities_24.html release notes vendor advisory
https://lists.apache.org/thread.html/re026d3da9d7824bd93b9f871c0fdda978d960c7e62d8c43cba8d0bf3%40%3Ccvs.httpd.apache.org%3E mailing list vendor advisory
https://lists.apache.org/thread.html/r90f693a5c9fb75550ef1412436d5e682a5f845beb427fa6f23419a3c%40%3Cannounce.httpd.apache.org%3E mailing list
https://lists.apache.org/thread.html/r7f2b70b621651548f4b6f027552f1dd91705d7111bb5d15cda0a68dd%40%3Cdev.httpd.apache.org%3E mailing list
http://www.openwall.com/lists/oss-security/2021/06/10/2 mailing list third party advisory mitigation
https://security.gentoo.org/glsa/202107-38 third party advisory vendor advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SPBR6WUYBJNACHKE65SPL7TJOHX7RHWD/ vendor advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZNCYSR3BXT36FFF4XTCPL3HDQK4VP45R/ vendor advisory
https://www.oracle.com/security-alerts/cpuoct2021.html third party advisory
https://security.netapp.com/advisory/ntap-20210702-0001/ third party advisory
https://lists.debian.org/debian-lts-announce/2024/05/msg00013.html mailing list

Frequently Asked Questions

What is the severity of CVE-2019-17567?
CVE-2019-17567 has been scored as a medium severity vulnerability.
How to fix CVE-2019-17567?
To fix CVE-2019-17567, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2019-17567 being actively exploited in the wild?
It is possible that CVE-2019-17567 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~12% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2019-17567?
CVE-2019-17567 affects Apache Software Foundation Apache HTTP Server.
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