Explore top 10 tips to secure your open-source projects now. Read More

×
Alerts This Week
Warning Icon 1 510
Alerts This Week
Warning Icon 1 510

Red Hat Enterprise Linux 8 RHSA-2020-4756-01 Moderate: Varnish DoS Issues

red hat
Calendar Grey November 4, 2020
Dist Redhat Esm H88
Oracle releases a critical patch update for Java SE impacting various systems with high severity addressing multiple vulnerabilities.
An update for the varnish:6 module is now available for Red Hat Enterprise Linux 8

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

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.

Topics%20covered

Topics Covered

security advisory denial of service bug fix Red Hat Enterprise Linux information disclosure varnish HTTP requests

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

Read the Full Advisory


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

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.

Topics%20covered

Topics Covered

security advisory denial of service bug fix Red Hat Enterprise Linux information disclosure varnish HTTP requests

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

Get the latest News and Insights

Get the latest Linux and open source security news straight to your inbox.