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Red Hat: RHSA-2019-2745-01 Critical: rh-nginx110-nginx DoS Vulnerabilities

red hat
Calendar Grey September 12, 2019
Dist Redhat Esm H88
Important rh-nginx110-nginx security patch for Red Hat mitigates HTTP/2 DDoS vulnerabilities. Read more about it here.
An update for rh-nginx110-nginx is now available for Red Hat Software Collections

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

The rh-nginx110-nginx service must be restarted for this update to take effect.

Summary

nginx is a web and proxy server supporting HTTP and other protocols, with a focus on high concurrency, performance, and low memory usage.
Security Fix(es):
* HTTP/2: large amount of data request leads to denial of service (CVE-2019-9511)
* HTTP/2: flood using PRIORITY frames resulting in excessive resource consumption (CVE-2019-9513)
* HTTP/2: 0-length headers leads to denial of service (CVE-2019-9516)
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.

Topics%20covered

Topics Covered

security advisory denial of service red hat nginx web server resource consumption http/2

References

https://access.redhat.com/security/cve/CVE-2019-9511 https://access.redhat.com/security/cve/CVE-2019-9513 https://access.redhat.com/security/cve/CVE-2019-9516 https://access.redhat.com/security/updates/classification#important

Package List

Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 6):
Source: rh-nginx110-nginx-1.10.2-9.el6.1.src.rpm
x86_64: rh-nginx110-nginx-1.10.2-9.el6.1.x86_64.rpm rh-nginx110-nginx-debuginfo-1.10.2-9.el6.1.x86_64.rpm rh-nginx110-nginx-mod-http-image-filter-1.10.2-9.el6.1.x86_64.rpm rh-nginx110-nginx-mod-http-perl-1.10.2-9.el6.1.x86_64.rpm rh-nginx110-nginx-mod-http-xslt-filter-1.10.2-9.el6.1.x86_64.rpm rh-nginx110-nginx-mod-mail-1.10.2-9.el6.1.x86_64.rpm rh-nginx110-nginx-mod-stream-1.10.2-9.el6.1.x86_64.rpm
Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 6):
Source: rh-nginx110-nginx-1.10.2-9.el6.1.src.rpm
x86_64: rh-nginx110-nginx-1.10.2-9.el6.1.x86_64.rpm rh-nginx110-nginx-debuginfo-1.10.2-9.el6.1.x86_64.rpm rh-nginx110-nginx-mod-http-image-filter-1.10.2-9.el6.1.x86_64.rpm rh-nginx110-nginx-mod-http-perl-1.10.2-9.el6.1.x86_64.rpm rh-nginx110-nginx-mod-http-xslt-filter-1.10.2-9.el6.1.x86_64.rpm rh-nginx110-nginx-mod-mail-1.10.2-9.el6.1.x86_64.rpm rh-nginx110-nginx-mod-stream-1.10.2-9.el6.1.x86_64.rpm
Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 7):
Source: rh-nginx110-nginx-1.10.2-9.el7.1.src.rpm
x86_64: rh-nginx110-nginx-1.10.2-9.el7.1.x86_64.rpm rh-nginx110-nginx-debuginfo-1.10.2-9.el7.1.x86_64.rpm

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2019:2745-01
Product: Red Hat Software Collections
Advisory URL: https://access.redhat.com/errata/RHSA-2019:2745
Issue date: 2019-09-12

Topic

An update for rh-nginx110-nginx is now available for Red Hat SoftwareCollections.Red Hat Product Security has rated this update as having a security impactof Important. A Common Vulnerability Scoring System (CVSS) base score,which gives a detailed severity rating, is available for each vulnerabilityfrom the CVE link(s) in the References section.

Topics%20covered

Topics Covered

security advisory denial of service red hat nginx web server resource consumption http/2

Relevant Releases Architectures

Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 6) - x86_64

Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 7) - x86_64

Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.4) - x86_64

Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.5) - x86_64

Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.6) - x86_64

Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.7) - x86_64

Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 6) - x86_64

Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 7) - x86_64

Bugs Fixed

1735741 - CVE-2019-9513 HTTP/2: flood using PRIORITY frames resulting in excessive resource consumption

1741860 - CVE-2019-9511 HTTP/2: large amount of data request leads to denial of service

1741864 - CVE-2019-9516 HTTP/2: 0-length headers leads to denial of service

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