What is RHSA-2021:3754?

RHSA-2021:3754 is a security advisory published by Red Hat Product Security with High severity. Red Hat Security Advisory: httpd24-httpd security update

Which CVE IDs does RHSA-2021:3754 cover?

RHSA-2021:3754 covers the following CVE IDs: CVE-2021-40438. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of RHSA-2021:3754?

RHSA-2021:3754 has a CVSS v3 base score of 9.0, published by Red Hat Product Security.

Which products are affected by RHSA-2021:3754?

RHSA-2021:3754 affects 38 products, including: Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 7); Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 7); httpd24-httpd-0:2.4.34-22.el7.1.ppc64le as a component of Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 7); httpd24-httpd-0:2.4.34-22.el7.1.s390x as a component of Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 7); httpd24-httpd-0:2.4.34-22.el7.1.src as a component of Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 7); and others — see the full list on the advisory page.

RHSA-2021:3754HighCVSS 9.0

Red Hat Security Advisory: httpd24-httpd security update

Vendor

Red Hat Product Security

Published

October 11, 2021

Last Modified

August 8, 2026

🔗 CVE IDs covered (1)

CVE-2021-40438 →

📋 Description

CVE-2021-40438 — httpd: mod_proxy: SSRF via a crafted request uri-path containing "unix:"

🎯 Affected products38

Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 7)
Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 7)
httpd24-httpd-0:2.4.34-22.el7.1.ppc64le as a component of Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 7)
httpd24-httpd-0:2.4.34-22.el7.1.s390x as a component of Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 7)
httpd24-httpd-0:2.4.34-22.el7.1.src as a component of Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 7)
httpd24-httpd-0:2.4.34-22.el7.1.src as a component of Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 7)
httpd24-httpd-0:2.4.34-22.el7.1.x86_64 as a component of Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 7)
httpd24-httpd-0:2.4.34-22.el7.1.x86_64 as a component of Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 7)
httpd24-httpd-debuginfo-0:2.4.34-22.el7.1.ppc64le as a component of Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 7)
httpd24-httpd-debuginfo-0:2.4.34-22.el7.1.s390x as a component of Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 7)
httpd24-httpd-debuginfo-0:2.4.34-22.el7.1.x86_64 as a component of Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 7)
httpd24-httpd-debuginfo-0:2.4.34-22.el7.1.x86_64 as a component of Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 7)
httpd24-httpd-devel-0:2.4.34-22.el7.1.ppc64le as a component of Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 7)
httpd24-httpd-devel-0:2.4.34-22.el7.1.s390x as a component of Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 7)
httpd24-httpd-devel-0:2.4.34-22.el7.1.x86_64 as a component of Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 7)
httpd24-httpd-devel-0:2.4.34-22.el7.1.x86_64 as a component of Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 7)
httpd24-httpd-manual-0:2.4.34-22.el7.1.noarch as a component of Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 7)
httpd24-httpd-manual-0:2.4.34-22.el7.1.noarch as a component of Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 7)
httpd24-httpd-tools-0:2.4.34-22.el7.1.ppc64le as a component of Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 7)
httpd24-httpd-tools-0:2.4.34-22.el7.1.s390x as a component of Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 7)
httpd24-httpd-tools-0:2.4.34-22.el7.1.x86_64 as a component of Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 7)
httpd24-httpd-tools-0:2.4.34-22.el7.1.x86_64 as a component of Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 7)
httpd24-mod_ldap-0:2.4.34-22.el7.1.ppc64le as a component of Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 7)
httpd24-mod_ldap-0:2.4.34-22.el7.1.s390x as a component of Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 7)
httpd24-mod_ldap-0:2.4.34-22.el7.1.x86_64 as a component of Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 7)
httpd24-mod_ldap-0:2.4.34-22.el7.1.x86_64 as a component of Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 7)
httpd24-mod_proxy_html-1:2.4.34-22.el7.1.ppc64le as a component of Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 7)
httpd24-mod_proxy_html-1:2.4.34-22.el7.1.s390x as a component of Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 7)
httpd24-mod_proxy_html-1:2.4.34-22.el7.1.x86_64 as a component of Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 7)
httpd24-mod_proxy_html-1:2.4.34-22.el7.1.x86_64 as a component of Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 7)
+8 more not shown

✅ Remediation

For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 After installing the updated packages, the httpd daemon will be restarted automatically. Workaround: Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update the affected package as soon as possible.

🔗 CVE IDs covered (1)

📋 Description

🎯 Affected products38

✅ Remediation

🔗 References (4)