RHSA-2020:4756 — Security Advisory

An update for the varnish:6 module is now available for Red Hat Enterprise Linux 8.

Red Hat Product Security has rated this update as having a security impact of Moderate. 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.

The following packages have been upgraded to a later upstream version: varnish (6.0.6). (BZ#1795673)

Security Fix(es):

• varnish: denial of service handling certain crafted HTTP/1 requests (CVE-2019-15892)

• varnish: remote clients may cause Varnish to assert and restart which could result in DoS (CVE-2020-11653)

• varnish: not clearing pointer between two client requests leads to information disclosure (CVE-2019-20637)

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.

Additional Changes:

For detailed information on changes in this release, see the Red Hat Enterprise Linux 8.3 Release Notes linked from the References section.