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Red Hat Security Advisory

Synopsis:          Important: rh-varnish6-varnish security update
Advisory ID:       RHSA-2021:2993-01
Product:           Red Hat Software Collections
Advisory URL:      https://access.redhat.com/errata/RHSA-2021:2993
Issue date:        2021-08-03
CVE Names:         CVE-2021-36740
====================================================================
1. Summary:

An update for rh-varnish6-varnish is now available for Red Hat Software
Collections.

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.

2. Relevant releases/architectures:

Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 7) - ppc64le, s390x, x86_64
Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.7) - ppc64le, s390x, x86_64
Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 7) - x86_64

3. Description:

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:
rh-varnish6-varnish (6.0.8).

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.

4. Solution:

For details on how to apply this update, which includes the changes
described in this advisory, refer to:

https://access.redhat.com/articles/11258

5. Bugs fixed (https://bugzilla.redhat.com/):

1982409 - CVE-2021-36740 varnish: HTTP/2 request smuggling attack via a large Content-Length header for a POST request

6. Package List:

Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 7):

Source:
rh-varnish6-varnish-6.0.8-2.el7.src.rpm
rh-varnish6-varnish-modules-0.15.0-7.el7.src.rpm

ppc64le:
rh-varnish6-varnish-6.0.8-2.el7.ppc64le.rpm
rh-varnish6-varnish-devel-6.0.8-2.el7.ppc64le.rpm
rh-varnish6-varnish-docs-6.0.8-2.el7.ppc64le.rpm
rh-varnish6-varnish-libs-6.0.8-2.el7.ppc64le.rpm
rh-varnish6-varnish-modules-0.15.0-7.el7.ppc64le.rpm
rh-varnish6-varnish-modules-debuginfo-0.15.0-7.el7.ppc64le.rpm

s390x:
rh-varnish6-varnish-6.0.8-2.el7.s390x.rpm
rh-varnish6-varnish-devel-6.0.8-2.el7.s390x.rpm
rh-varnish6-varnish-docs-6.0.8-2.el7.s390x.rpm
rh-varnish6-varnish-libs-6.0.8-2.el7.s390x.rpm
rh-varnish6-varnish-modules-0.15.0-7.el7.s390x.rpm
rh-varnish6-varnish-modules-debuginfo-0.15.0-7.el7.s390x.rpm

x86_64:
rh-varnish6-varnish-6.0.8-2.el7.x86_64.rpm
rh-varnish6-varnish-devel-6.0.8-2.el7.x86_64.rpm
rh-varnish6-varnish-docs-6.0.8-2.el7.x86_64.rpm
rh-varnish6-varnish-libs-6.0.8-2.el7.x86_64.rpm
rh-varnish6-varnish-modules-0.15.0-7.el7.x86_64.rpm
rh-varnish6-varnish-modules-debuginfo-0.15.0-7.el7.x86_64.rpm

Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.7):

Source:
rh-varnish6-varnish-6.0.8-2.el7.src.rpm
rh-varnish6-varnish-modules-0.15.0-7.el7.src.rpm

ppc64le:
rh-varnish6-varnish-6.0.8-2.el7.ppc64le.rpm
rh-varnish6-varnish-devel-6.0.8-2.el7.ppc64le.rpm
rh-varnish6-varnish-docs-6.0.8-2.el7.ppc64le.rpm
rh-varnish6-varnish-libs-6.0.8-2.el7.ppc64le.rpm
rh-varnish6-varnish-modules-0.15.0-7.el7.ppc64le.rpm
rh-varnish6-varnish-modules-debuginfo-0.15.0-7.el7.ppc64le.rpm

s390x:
rh-varnish6-varnish-6.0.8-2.el7.s390x.rpm
rh-varnish6-varnish-devel-6.0.8-2.el7.s390x.rpm
rh-varnish6-varnish-docs-6.0.8-2.el7.s390x.rpm
rh-varnish6-varnish-libs-6.0.8-2.el7.s390x.rpm
rh-varnish6-varnish-modules-0.15.0-7.el7.s390x.rpm
rh-varnish6-varnish-modules-debuginfo-0.15.0-7.el7.s390x.rpm

x86_64:
rh-varnish6-varnish-6.0.8-2.el7.x86_64.rpm
rh-varnish6-varnish-devel-6.0.8-2.el7.x86_64.rpm
rh-varnish6-varnish-docs-6.0.8-2.el7.x86_64.rpm
rh-varnish6-varnish-libs-6.0.8-2.el7.x86_64.rpm
rh-varnish6-varnish-modules-0.15.0-7.el7.x86_64.rpm
rh-varnish6-varnish-modules-debuginfo-0.15.0-7.el7.x86_64.rpm

Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 7):

Source:
rh-varnish6-varnish-6.0.8-2.el7.src.rpm
rh-varnish6-varnish-modules-0.15.0-7.el7.src.rpm

x86_64:
rh-varnish6-varnish-6.0.8-2.el7.x86_64.rpm
rh-varnish6-varnish-devel-6.0.8-2.el7.x86_64.rpm
rh-varnish6-varnish-docs-6.0.8-2.el7.x86_64.rpm
rh-varnish6-varnish-libs-6.0.8-2.el7.x86_64.rpm
rh-varnish6-varnish-modules-0.15.0-7.el7.x86_64.rpm
rh-varnish6-varnish-modules-debuginfo-0.15.0-7.el7.x86_64.rpm

These packages are GPG signed by Red Hat for security.  Our key and
details on how to verify the signature are available from
https://access.redhat.com/security/team/key/

7. References:

https://access.redhat.com/security/cve/CVE-2021-36740
https://access.redhat.com/security/updates/classification/#important

8. Contact:

The Red Hat security contact is <secalert@redhat.com>. More contact
details at https://access.redhat.com/security/team/contact/

Copyright 2021 Red Hat, Inc.
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