RHSA-2021:2988 — Security Advisory

An update for the varnish:6 module is now available for Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 8.1 Extended Update Support, and Red Hat Enterprise Linux 8.2 Extended Update Support.

Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

Varnish Cache is a high-performance HTTP accelerator. It stores web pages in memory so web servers don't have to create the same web page over and over again, giving the website a significant speed up.

Security Fix(es):

• varnish: HTTP/2 request smuggling attack via a large Content-Length header for a POST request (CVE-2021-36740)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.