Synopsis

Important: nginx:1.14 security update

Type/Severity

Security Advisory: Important

Topic

An update for the nginx:1.14 module is now available for Red Hat Enterprise Linux 8.

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.

Description

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.

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

Affected Products

• Red Hat Enterprise Linux for x86_64 8 x86_64
• Red Hat Enterprise Linux for IBM z Systems 8 s390x
• Red Hat Enterprise Linux for Power, little endian 8 ppc64le
• Red Hat Enterprise Linux for ARM 64 8 aarch64
• Red Hat Enterprise Linux Server (for IBM Power LE) - Update Services for SAP Solutions 8.0 ppc64le
• Red Hat Enterprise Linux Server - Update Services for SAP Solutions 8.0 x86_64

Fixes

• BZ - 1735741 - CVE-2019-9513 HTTP/2: flood using PRIORITY frames resulting in excessive resource consumption
• BZ - 1741860 - CVE-2019-9511 HTTP/2: large amount of data requests leads to denial of service
• BZ - 1741864 - CVE-2019-9516 HTTP/2: 0-length headers lead to denial of service

CVEs

• CVE-2019-9511
• CVE-2019-9513
• CVE-2019-9516

References