CVE-2020-1927 Open redirect in Apache HTTP Server

What is CVE-2020-1927?

CVE-2020-1927 is a medium-severity vulnerability in Apache Http Server, published on 1 Apr 2020. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

In Apache HTTP Server 2.4.0 to 2.4.41, redirects configured with mod_rewrite that were intended to be self-referential might be fooled by encoded newlines and redirect instead to an an unexpected URL within the request URL.

Weakness: CWE-601

Which versions are affected by CVE-2020-1927?

1 open source package ship an affected version, including apache. It affects 14 products.

Products include Apache Http Server, Broadcom Brocade Fabric Operating System, Canonical Ubuntu Linux, Debian Debian Linux, Fedoraproject Fedora, Netapp Oncommand Unified Manager Core Package and 8 more.

How do I fix CVE-2020-1927?

Upgrade apache to 2.4.42 or later.

Is CVE-2020-1927 being exploited?

There is no known exploitation of CVE-2020-1927 in the wild and no public exploit code.

Other vulnerabilities in Apache Http Server

• CVE-2021-42013 Apache HTTP Server Path Traversal Exploited Critical 9.8
• CVE-2024-38475 Apache HTTP Server Improper Escaping of Output Exploited Critical 9.1
• CVE-2021-40438 Apache HTTP Server-Side Request Forgery (SSRF) Exploited Critical 9.0
• CVE-2019-0211 Apache HTTP Server Privilege Escalation Exploited High 7.8
• CVE-2021-41773 Apache HTTP Server Path Traversal Exploited High 7.5

All Apache Http Server vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as ALPINE-CVE-2020-1927, BIT-apache-2020-1927, CLEANSTART-2026-VO42453, DEBIAN-CVE-2020-1927, GHSA-h8gj-rgqf-fpq3, UBUNTU-CVE-2020-1927.