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====================================================================                   Red Hat Security Advisory

Synopsis:          Moderate: varnish:6 security, bug fix, and enhancement update
Advisory ID:       RHSA-2020:4756-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://access.redhat.com/errata/RHSA-2020:4756
Issue date:        2020-11-03
CVE Names:         CVE-2019-15892 CVE-2019-20637 CVE-2020-11653 
====================================================================
1. Summary:

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.

2. Relevant releases/architectures:

Red Hat Enterprise Linux AppStream (v. 8) - aarch64, ppc64le, s390x, 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:
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.

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/):

1756079 - CVE-2019-15892 varnish: denial of service handling certain crafted HTTP/1 requests
1772362 - CVE-2019-20637 varnish: not clearing pointer between two client requests leads to information disclosure
1813867 - CVE-2020-11653 varnish: remote clients may cause Varnish to assert and restart which could result in DoS

6. Package List:

Red Hat Enterprise Linux AppStream (v. 8):

Source:
varnish-6.0.6-2.module+el8.3.0+6843+b3b42fcc.src.rpm
varnish-modules-0.15.0-5.module+el8.3.0+6843+b3b42fcc.src.rpm

aarch64:
varnish-6.0.6-2.module+el8.3.0+6843+b3b42fcc.aarch64.rpm
varnish-devel-6.0.6-2.module+el8.3.0+6843+b3b42fcc.aarch64.rpm
varnish-docs-6.0.6-2.module+el8.3.0+6843+b3b42fcc.aarch64.rpm
varnish-modules-0.15.0-5.module+el8.3.0+6843+b3b42fcc.aarch64.rpm
varnish-modules-debuginfo-0.15.0-5.module+el8.3.0+6843+b3b42fcc.aarch64.rpm
varnish-modules-debugsource-0.15.0-5.module+el8.3.0+6843+b3b42fcc.aarch64.rpm

ppc64le:
varnish-6.0.6-2.module+el8.3.0+6843+b3b42fcc.ppc64le.rpm
varnish-devel-6.0.6-2.module+el8.3.0+6843+b3b42fcc.ppc64le.rpm
varnish-docs-6.0.6-2.module+el8.3.0+6843+b3b42fcc.ppc64le.rpm
varnish-modules-0.15.0-5.module+el8.3.0+6843+b3b42fcc.ppc64le.rpm
varnish-modules-debuginfo-0.15.0-5.module+el8.3.0+6843+b3b42fcc.ppc64le.rpm
varnish-modules-debugsource-0.15.0-5.module+el8.3.0+6843+b3b42fcc.ppc64le.rpm

s390x:
varnish-6.0.6-2.module+el8.3.0+6843+b3b42fcc.s390x.rpm
varnish-devel-6.0.6-2.module+el8.3.0+6843+b3b42fcc.s390x.rpm
varnish-docs-6.0.6-2.module+el8.3.0+6843+b3b42fcc.s390x.rpm
varnish-modules-0.15.0-5.module+el8.3.0+6843+b3b42fcc.s390x.rpm
varnish-modules-debuginfo-0.15.0-5.module+el8.3.0+6843+b3b42fcc.s390x.rpm
varnish-modules-debugsource-0.15.0-5.module+el8.3.0+6843+b3b42fcc.s390x.rpm

x86_64:
varnish-6.0.6-2.module+el8.3.0+6843+b3b42fcc.x86_64.rpm
varnish-devel-6.0.6-2.module+el8.3.0+6843+b3b42fcc.x86_64.rpm
varnish-docs-6.0.6-2.module+el8.3.0+6843+b3b42fcc.x86_64.rpm
varnish-modules-0.15.0-5.module+el8.3.0+6843+b3b42fcc.x86_64.rpm
varnish-modules-debuginfo-0.15.0-5.module+el8.3.0+6843+b3b42fcc.x86_64.rpm
varnish-modules-debugsource-0.15.0-5.module+el8.3.0+6843+b3b42fcc.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-2019-15892
https://access.redhat.com/security/cve/CVE-2019-20637
https://access.redhat.com/security/cve/CVE-2020-11653
https://access.redhat.com/security/updates/classification/#moderate
https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/8.3_release_notes/

8. Contact:

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

Copyright 2020 Red Hat, Inc.
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RedHat: RHSA-2020-4756:01 Moderate: varnish:6 security, bug fix,

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

Summary

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.



Summary


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

References

https://access.redhat.com/security/cve/CVE-2019-15892 https://access.redhat.com/security/cve/CVE-2019-20637 https://access.redhat.com/security/cve/CVE-2020-11653 https://access.redhat.com/security/updates/classification/#moderate https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/8.3_release_notes/

Package List

Red Hat Enterprise Linux AppStream (v. 8):
Source: varnish-6.0.6-2.module+el8.3.0+6843+b3b42fcc.src.rpm varnish-modules-0.15.0-5.module+el8.3.0+6843+b3b42fcc.src.rpm
aarch64: varnish-6.0.6-2.module+el8.3.0+6843+b3b42fcc.aarch64.rpm varnish-devel-6.0.6-2.module+el8.3.0+6843+b3b42fcc.aarch64.rpm varnish-docs-6.0.6-2.module+el8.3.0+6843+b3b42fcc.aarch64.rpm varnish-modules-0.15.0-5.module+el8.3.0+6843+b3b42fcc.aarch64.rpm varnish-modules-debuginfo-0.15.0-5.module+el8.3.0+6843+b3b42fcc.aarch64.rpm varnish-modules-debugsource-0.15.0-5.module+el8.3.0+6843+b3b42fcc.aarch64.rpm
ppc64le: varnish-6.0.6-2.module+el8.3.0+6843+b3b42fcc.ppc64le.rpm varnish-devel-6.0.6-2.module+el8.3.0+6843+b3b42fcc.ppc64le.rpm varnish-docs-6.0.6-2.module+el8.3.0+6843+b3b42fcc.ppc64le.rpm varnish-modules-0.15.0-5.module+el8.3.0+6843+b3b42fcc.ppc64le.rpm varnish-modules-debuginfo-0.15.0-5.module+el8.3.0+6843+b3b42fcc.ppc64le.rpm varnish-modules-debugsource-0.15.0-5.module+el8.3.0+6843+b3b42fcc.ppc64le.rpm
s390x: varnish-6.0.6-2.module+el8.3.0+6843+b3b42fcc.s390x.rpm varnish-devel-6.0.6-2.module+el8.3.0+6843+b3b42fcc.s390x.rpm varnish-docs-6.0.6-2.module+el8.3.0+6843+b3b42fcc.s390x.rpm varnish-modules-0.15.0-5.module+el8.3.0+6843+b3b42fcc.s390x.rpm varnish-modules-debuginfo-0.15.0-5.module+el8.3.0+6843+b3b42fcc.s390x.rpm varnish-modules-debugsource-0.15.0-5.module+el8.3.0+6843+b3b42fcc.s390x.rpm
x86_64: varnish-6.0.6-2.module+el8.3.0+6843+b3b42fcc.x86_64.rpm varnish-devel-6.0.6-2.module+el8.3.0+6843+b3b42fcc.x86_64.rpm varnish-docs-6.0.6-2.module+el8.3.0+6843+b3b42fcc.x86_64.rpm varnish-modules-0.15.0-5.module+el8.3.0+6843+b3b42fcc.x86_64.rpm varnish-modules-debuginfo-0.15.0-5.module+el8.3.0+6843+b3b42fcc.x86_64.rpm varnish-modules-debugsource-0.15.0-5.module+el8.3.0+6843+b3b42fcc.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/


Severity
Advisory ID: RHSA-2020:4756-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2020:4756
Issued Date: : 2020-11-03
CVE Names: CVE-2019-15892 CVE-2019-20637 CVE-2020-11653

Topic

An update for the varnish:6 module is now available for Red Hat EnterpriseLinux 8.Red Hat Product Security has rated this update as having a security impactof Moderate. A Common Vulnerability Scoring System (CVSS) base score, whichgives a detailed severity rating, is available for each vulnerability fromthe CVE link(s) in the References section.


Topic


 

Relevant Releases Architectures

Red Hat Enterprise Linux AppStream (v. 8) - aarch64, ppc64le, s390x, x86_64


Bugs Fixed

1756079 - CVE-2019-15892 varnish: denial of service handling certain crafted HTTP/1 requests

1772362 - CVE-2019-20637 varnish: not clearing pointer between two client requests leads to information disclosure

1813867 - CVE-2020-11653 varnish: remote clients may cause Varnish to assert and restart which could result in DoS


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