CVE-2019-0196 Use after free in Apache HTTP Server

What is CVE-2019-0196?

CVE-2019-0196 is a medium-severity use after free vulnerability in Apache Http Server, published on 11 Jun 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

A vulnerability was found in Apache HTTP Server 2.4.17 to 2.4.38. Using fuzzed network input, the http/2 request handling could be made to access freed memory in string comparison when determining the method of a request and thus process the request incorrectly.

Weakness: CWE-416

Which versions are affected by CVE-2019-0196?

It affects 3 products.

Products include Apache Http Server, Canonical Ubuntu Linux, Debian Debian Linux.

How do I fix CVE-2019-0196?

Upgrade to a fixed version.

Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.

Is CVE-2019-0196 being exploited?

There is no known exploitation of CVE-2019-0196 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-2019-0196, CLEANSTART-2026-HI95009, DEBIAN-CVE-2019-0196, GHSA-vqc7-p7p7-97wf, UBUNTU-CVE-2019-0196.