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RedHat RHSA-2019-2799-01 Important: Nginx:1.14 DoS Vulnerabilities

red hat
Calendar Grey September 19, 2019
Dist Redhat Esm H88
New release issued for nginx:1.14 categorized as Critical by Red Hat Security affecting HTTP/3 settings.
An update for the nginx:1.14 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

Nginx is a web server and a reverse proxy server for HTTP, SMTP, POP3 (Post Office Protocol 3) and IMAP 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 update red hat important nginx 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 Enterprise Linux AppStream (v. 8):
Source: nginx-1.14.1-9.module+el8.0.0+4108+af250afe.src.rpm
aarch64: nginx-1.14.1-9.module+el8.0.0+4108+af250afe.aarch64.rpm nginx-debuginfo-1.14.1-9.module+el8.0.0+4108+af250afe.aarch64.rpm nginx-debugsource-1.14.1-9.module+el8.0.0+4108+af250afe.aarch64.rpm nginx-mod-http-image-filter-1.14.1-9.module+el8.0.0+4108+af250afe.aarch64.rpm nginx-mod-http-image-filter-debuginfo-1.14.1-9.module+el8.0.0+4108+af250afe.aarch64.rpm nginx-mod-http-perl-1.14.1-9.module+el8.0.0+4108+af250afe.aarch64.rpm nginx-mod-http-perl-debuginfo-1.14.1-9.module+el8.0.0+4108+af250afe.aarch64.rpm nginx-mod-http-xslt-filter-1.14.1-9.module+el8.0.0+4108+af250afe.aarch64.rpm nginx-mod-http-xslt-filter-debuginfo-1.14.1-9.module+el8.0.0+4108+af250afe.aarch64.rpm nginx-mod-mail-1.14.1-9.module+el8.0.0+4108+af250afe.aarch64.rpm nginx-mod-mail-debuginfo-1.14.1-9.module+el8.0.0+4108+af250afe.aarch64.rpm nginx-mod-stream-1.14.1-9.module+el8.0.0+4108+af250afe.aarch64.rpm nginx-mod-stream-debuginfo-1.14.1-9.module+el8.0.0+4108+af250afe.aarch64.rpm
noarch: nginx-all-modules-1.14.1-9.module+el8.0.0+4108+af250afe.noarch.rpm nginx-filesystem-1.14.1-9.module+el8.0.0+4108+af250afe.noarch.rpm
ppc64le: nginx-1.14.1-9.module+el8.0.0+4108+af250afe.ppc64le.rpm

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2019:2799-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2019:2799
Issue date: 2019-09-17

Topic

An update for the nginx:1.14 module is now available for Red Hat EnterpriseLinux 8.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 update red hat important nginx http/2

Relevant Releases Architectures

Red Hat Enterprise Linux AppStream (v. 8) - aarch64, noarch, ppc64le, s390x, 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 requests leads to denial of service

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

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