CVE-2019-0190 Denial of service in Apache HTTP Server

What is CVE-2019-0190?

CVE-2019-0190 is a high-severity denial of service vulnerability in Apache Http Server, published on 30 Jan 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

A bug exists in the way mod_ssl handled client renegotiations. A remote attacker could send a carefully crafted request that would cause mod_ssl to enter a loop leading to a denial of service. This bug can be only triggered with Apache HTTP Server version 2.4.37 when using OpenSSL version 1.1.1 or later, due to an interaction in changes to handling of renegotiation attempts.

Which versions are affected by CVE-2019-0190?

It affects 5 products.

Products include Apache Http Server, Oracle Enterprise Manager Ops Center, Oracle Hospitality Guest Access, Oracle Instantis Enterprisetrack, Oracle Retail Xstore Point of Service.

How do I fix CVE-2019-0190?

Upgrade to a fixed version.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2019-0190 being exploited?

There is no known exploitation of CVE-2019-0190 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-2019-0190, CLEANSTART-2026-MZ37947, DEBIAN-CVE-2019-0190, GHSA-m3q7-x278-m229.