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Red Hat Enterprise: RHSA-2021:2290 Moderate: Nginx Off-By-One

red hat
Calendar Grey June 8, 2021
Dist Redhat Esm H88
Enhancement for nginx:1.16 module affects Red Hat systems with critical security evaluations and remedies for recognized vulnerabilities.
An update for the nginx:1.16 module is now available for Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 8.1 Extended Update Support, and Red Hat Enterprise Linux 8.2 Extended...

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 and proxy server supporting HTTP and other protocols, with a focus on high concurrency, performance, and low memory usage.
Security Fix(es):
* nginx: Off-by-one in ngx_resolver_copy() when labels are followed by a pointer to a root domain name (CVE-2021-23017)
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 update red hat important security impact nginx web server

References

https://access.redhat.com/security/cve/CVE-2021-23017 https://access.redhat.com/security/updates/classification/#important

Package List

Red Hat Enterprise Linux AppStream EUS (v. 8.1):
Source: nginx-1.16.1-1.module+el8.1.0+11153+6c3a40a9.1.src.rpm
aarch64: nginx-1.16.1-1.module+el8.1.0+11153+6c3a40a9.1.aarch64.rpm nginx-debuginfo-1.16.1-1.module+el8.1.0+11153+6c3a40a9.1.aarch64.rpm nginx-debugsource-1.16.1-1.module+el8.1.0+11153+6c3a40a9.1.aarch64.rpm nginx-mod-http-image-filter-1.16.1-1.module+el8.1.0+11153+6c3a40a9.1.aarch64.rpm nginx-mod-http-image-filter-debuginfo-1.16.1-1.module+el8.1.0+11153+6c3a40a9.1.aarch64.rpm nginx-mod-http-perl-1.16.1-1.module+el8.1.0+11153+6c3a40a9.1.aarch64.rpm nginx-mod-http-perl-debuginfo-1.16.1-1.module+el8.1.0+11153+6c3a40a9.1.aarch64.rpm nginx-mod-http-xslt-filter-1.16.1-1.module+el8.1.0+11153+6c3a40a9.1.aarch64.rpm nginx-mod-http-xslt-filter-debuginfo-1.16.1-1.module+el8.1.0+11153+6c3a40a9.1.aarch64.rpm nginx-mod-mail-1.16.1-1.module+el8.1.0+11153+6c3a40a9.1.aarch64.rpm nginx-mod-mail-debuginfo-1.16.1-1.module+el8.1.0+11153+6c3a40a9.1.aarch64.rpm nginx-mod-stream-1.16.1-1.module+el8.1.0+11153+6c3a40a9.1.aarch64.rpm nginx-mod-stream-debuginfo-1.16.1-1.module+el8.1.0+11153+6c3a40a9.1.aarch64.rpm
noarch: nginx-all-modules-1.16.1-1.module+el8.1.0+11153+6c3a40a9.1.noarch.rpm nginx-filesystem-1.16.1-1.module+el8.1.0+11153+6c3a40a9.1.noarch.rpm
ppc64le:

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2021:2290-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2021:2290
Issue date: 2021-06-08

Topic

An update for the nginx:1.16 module is now available for Red Hat EnterpriseLinux 8, Red Hat Enterprise Linux 8.1 Extended Update Support, and Red HatEnterprise Linux 8.2 Extended Update Support.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 update red hat important security impact nginx web server

Relevant Releases Architectures

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

Red Hat Enterprise Linux AppStream EUS (v. 8.1) - aarch64, noarch, ppc64le, s390x, x86_64

Red Hat Enterprise Linux AppStream EUS (v. 8.2) - aarch64, noarch, ppc64le, s390x, x86_64

Bugs Fixed

1963121 - CVE-2021-23017 nginx: Off-by-one in ngx_resolver_copy() when labels are followed by a pointer to a root domain name

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