Apache 2.4.23 (mod_http2) – Denial of Service

by CIRT Team

Description:

CVE-2016-8740: 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.

Impact: Apache HTTPD Server 2.4.17 through 2.4.23 are vulnerable, remote attackers can exploit this issue to exhaust the memory, resulting in a denial-of-service condition.

Mitigation: Vendor has released patch version.

Reference URL’s:

• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-8740
• https://www.rapid7.com/db/vulnerabilities/apache-httpd-cve-2016-8740
• https://httpd.apache.org/security/vulnerabilities_24.html

CIRT Team

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