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.

Scores

EPSS (exploitation in 30 days)

59.7% · top 0.9% of all CVEs (6 Nov 2026)

The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.3.

Weakness

• mod_proxy_wstunnel tunneling of non Upgraded connections
• CWE-444 (opens in a new tab)All about CWE-444 and its CVEs

Affected products

• Apache Software Foundation · Apache HTTP Server

  • affected 2.4.46
  • affected 2.4.43
  • affected 2.4.41
  • affected 2.4.39
  • affected 2.4.38
  • affected 2.4.37
  • affected 2.4.35
  • affected 2.4.34
  • affected 2.4.33
  • affected 2.4.29
  • affected 2.4.28
  • affected 2.4.27
  • affected 2.4.26
  • affected 2.4.25
  • affected 2.4.23
  • affected 2.4.20
  • affected 2.4.18
  • affected 2.4.17
  • affected 2.4.16
  • affected 2.4.12
  • affected 2.4.10
  • affected 2.4.9
  • affected 2.4.7
  • affected 2.4.6

References (11)

• http://httpd.apache.org/security/vulnerabilities_24.html (opens in a new tab)x_transferred
• https://lists.apache.org/thread.html/re026d3da9d7824bd93b9f871c0fdda978d960c7e62d8c43cba8d0bf3%40%3Ccvs.httpd.apache.org%3E (opens in a new tab)x_transferred
• [httpd-announce] 20210609 CVE-2019-17567: mod_proxy_wstunnel tunneling of non Upgraded connections (opens in a new tab)mailing-listx_transferred
• [httpd-dev] 20210610 Re: svn commit: r1890598 - in /httpd/site/trunk/content/security/json: CVE-2019-17567.json CVE-2020-13938.json CVE-2020-13950.json CVE-2020-35452.json CVE-2021-26690.json CVE-2021-26691.json CVE-2021-30641.json CVE-2021-31618.json (opens in a new tab)mailing-listx_transferred
• [oss-security] 20210609 CVE-2019-17567: Apache httpd: mod_proxy_wstunnel tunneling of non Upgraded connections (opens in a new tab)mailing-listx_transferred
• GLSA-202107-38 (opens in a new tab)vendor-advisoryx_transferred
• FEDORA-2021-dce7e7738e (opens in a new tab)vendor-advisoryx_transferred
• FEDORA-2021-e3f6dd670d (opens in a new tab)vendor-advisoryx_transferred
• https://www.oracle.com/security-alerts/cpuoct2021.html (opens in a new tab)x_transferred
• https://security.netapp.com/advisory/ntap-20210702-0001/ (opens in a new tab)x_transferred
• [debian-lts-announce] 20240525 [SECURITY] [DLA 3818-1] apache2 security update (opens in a new tab)mailing-listx_transferred

Sources

The same CVE in the primary databases and aggregators, to check against.

• CVE.org record (opens in a new tab)
• CVE List JSON (GitHub) (opens in a new tab)
• NVD (opens in a new tab)
• FIRST EPSS (opens in a new tab)
• OSV.dev (opens in a new tab)
• GitHub Advisories (opens in a new tab)
• CIRCL Vulnerability-Lookup (opens in a new tab)

Badge for a README or a ticket

[![CVE-2019-17567](https://trackcve.app/badge/CVE-2019-17567.svg)](https://trackcve.app/cve/CVE-2019-17567)

Record last updated 5 Aug 2024, 01:40 UTC.