CVE Catalog

CVE-2016-8740

High
Published: Translated: NVD NIST

Summary

The mod_http2 module in Apache HTTP Server versions 2.4.17 to 2.4.23 does not restrict request-header length when the Protocols configuration includes h2 or h2c. This allows remote attackers to cause a denial of service via crafted CONTINUATION frames in an HTTP/2 request.

Risk Assessment

Attackers can exploit this vulnerability to cause memory consumption, leading to denial of service. This may affect the availability of services provided by the server.

Recommendation

It is recommended to upgrade the Apache HTTP Server to version 2.4.24 or later to mitigate this vulnerability. Additionally, consider restricting request-header length in the server configuration.

Related vulnerabilities

Original NVD description (English source)

The mod_http2 module in the Apache HTTP Server 2.4.17 through 2.4.23, when the Protocols configuration includes h2 or h2c, does not restrict request-header length, which allows remote attackers to cause a denial of service (memory consumption) via crafted CONTINUATION frames in an HTTP/2 request.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS