What is RHSA-2021:2259?

RHSA-2021:2259 is a security advisory published by Red Hat Product Security with High severity. Red Hat Security Advisory: nginx:1.18 security update

Which CVE IDs does RHSA-2021:2259 cover?

RHSA-2021:2259 covers the following CVE IDs: CVE-2021-23017. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of RHSA-2021:2259?

RHSA-2021:2259 has a CVSS v3 base score of 8.1, published by Red Hat Product Security.

Which products are affected by RHSA-2021:2259?

RHSA-2021:2259 affects 56 products, including: Red Hat Enterprise Linux AppStream (v. 8); nginx-1:1.18.0-3.module+el8.4.0+11152+f736ed63.1.aarch64 (nginx:1.18) as a component of Red Hat Enterprise Linux AppStream (v. 8); nginx-1:1.18.0-3.module+el8.4.0+11152+f736ed63.1.ppc64le (nginx:1.18) as a component of Red Hat Enterprise Linux AppStream (v. 8); nginx-1:1.18.0-3.module+el8.4.0+11152+f736ed63.1.s390x (nginx:1.18) as a component of Red Hat Enterprise Linux AppStream (v. 8); nginx-1:1.18.0-3.module+el8.4.0+11152+f736ed63.1.src (nginx:1.18) as a component of Red Hat Enterprise Linux AppStream (v. 8); and others — see the full list on the advisory page.

RHSA-2021:2259HighCVSS 8.1

Red Hat Security Advisory: nginx:1.18 security update

Vendor

Red Hat Product Security

Published

June 7, 2021

Last Modified

August 4, 2026

🔗 CVE IDs covered (1)

CVE-2021-23017 →

📋 Description

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

🎯 Affected products56

Red Hat Enterprise Linux AppStream (v. 8)
nginx-1:1.18.0-3.module+el8.4.0+11152+f736ed63.1.aarch64 (nginx:1.18) as a component of Red Hat Enterprise Linux AppStream (v. 8)
nginx-1:1.18.0-3.module+el8.4.0+11152+f736ed63.1.ppc64le (nginx:1.18) as a component of Red Hat Enterprise Linux AppStream (v. 8)
nginx-1:1.18.0-3.module+el8.4.0+11152+f736ed63.1.s390x (nginx:1.18) as a component of Red Hat Enterprise Linux AppStream (v. 8)
nginx-1:1.18.0-3.module+el8.4.0+11152+f736ed63.1.src (nginx:1.18) as a component of Red Hat Enterprise Linux AppStream (v. 8)
nginx-1:1.18.0-3.module+el8.4.0+11152+f736ed63.1.x86_64 (nginx:1.18) as a component of Red Hat Enterprise Linux AppStream (v. 8)
nginx-all-modules-1:1.18.0-3.module+el8.4.0+11152+f736ed63.1.noarch (nginx:1.18) as a component of Red Hat Enterprise Linux AppStream (v. 8)
nginx-debuginfo-1:1.18.0-3.module+el8.4.0+11152+f736ed63.1.aarch64 (nginx:1.18) as a component of Red Hat Enterprise Linux AppStream (v. 8)
nginx-debuginfo-1:1.18.0-3.module+el8.4.0+11152+f736ed63.1.ppc64le (nginx:1.18) as a component of Red Hat Enterprise Linux AppStream (v. 8)
nginx-debuginfo-1:1.18.0-3.module+el8.4.0+11152+f736ed63.1.s390x (nginx:1.18) as a component of Red Hat Enterprise Linux AppStream (v. 8)
nginx-debuginfo-1:1.18.0-3.module+el8.4.0+11152+f736ed63.1.x86_64 (nginx:1.18) as a component of Red Hat Enterprise Linux AppStream (v. 8)
nginx-debugsource-1:1.18.0-3.module+el8.4.0+11152+f736ed63.1.aarch64 (nginx:1.18) as a component of Red Hat Enterprise Linux AppStream (v. 8)
nginx-debugsource-1:1.18.0-3.module+el8.4.0+11152+f736ed63.1.ppc64le (nginx:1.18) as a component of Red Hat Enterprise Linux AppStream (v. 8)
nginx-debugsource-1:1.18.0-3.module+el8.4.0+11152+f736ed63.1.s390x (nginx:1.18) as a component of Red Hat Enterprise Linux AppStream (v. 8)
nginx-debugsource-1:1.18.0-3.module+el8.4.0+11152+f736ed63.1.x86_64 (nginx:1.18) as a component of Red Hat Enterprise Linux AppStream (v. 8)
nginx-filesystem-1:1.18.0-3.module+el8.4.0+11152+f736ed63.1.noarch (nginx:1.18) as a component of Red Hat Enterprise Linux AppStream (v. 8)
nginx-mod-http-image-filter-1:1.18.0-3.module+el8.4.0+11152+f736ed63.1.aarch64 (nginx:1.18) as a component of Red Hat Enterprise Linux AppStream (v. 8)
nginx-mod-http-image-filter-1:1.18.0-3.module+el8.4.0+11152+f736ed63.1.ppc64le (nginx:1.18) as a component of Red Hat Enterprise Linux AppStream (v. 8)
nginx-mod-http-image-filter-1:1.18.0-3.module+el8.4.0+11152+f736ed63.1.s390x (nginx:1.18) as a component of Red Hat Enterprise Linux AppStream (v. 8)
nginx-mod-http-image-filter-1:1.18.0-3.module+el8.4.0+11152+f736ed63.1.x86_64 (nginx:1.18) as a component of Red Hat Enterprise Linux AppStream (v. 8)
nginx-mod-http-image-filter-debuginfo-1:1.18.0-3.module+el8.4.0+11152+f736ed63.1.aarch64 (nginx:1.18) as a component of Red Hat Enterprise Linux AppStream (v. 8)
nginx-mod-http-image-filter-debuginfo-1:1.18.0-3.module+el8.4.0+11152+f736ed63.1.ppc64le (nginx:1.18) as a component of Red Hat Enterprise Linux AppStream (v. 8)
nginx-mod-http-image-filter-debuginfo-1:1.18.0-3.module+el8.4.0+11152+f736ed63.1.s390x (nginx:1.18) as a component of Red Hat Enterprise Linux AppStream (v. 8)
nginx-mod-http-image-filter-debuginfo-1:1.18.0-3.module+el8.4.0+11152+f736ed63.1.x86_64 (nginx:1.18) as a component of Red Hat Enterprise Linux AppStream (v. 8)
nginx-mod-http-perl-1:1.18.0-3.module+el8.4.0+11152+f736ed63.1.aarch64 (nginx:1.18) as a component of Red Hat Enterprise Linux AppStream (v. 8)
nginx-mod-http-perl-1:1.18.0-3.module+el8.4.0+11152+f736ed63.1.ppc64le (nginx:1.18) as a component of Red Hat Enterprise Linux AppStream (v. 8)
nginx-mod-http-perl-1:1.18.0-3.module+el8.4.0+11152+f736ed63.1.s390x (nginx:1.18) as a component of Red Hat Enterprise Linux AppStream (v. 8)
nginx-mod-http-perl-1:1.18.0-3.module+el8.4.0+11152+f736ed63.1.x86_64 (nginx:1.18) as a component of Red Hat Enterprise Linux AppStream (v. 8)
nginx-mod-http-perl-debuginfo-1:1.18.0-3.module+el8.4.0+11152+f736ed63.1.aarch64 (nginx:1.18) as a component of Red Hat Enterprise Linux AppStream (v. 8)
nginx-mod-http-perl-debuginfo-1:1.18.0-3.module+el8.4.0+11152+f736ed63.1.ppc64le (nginx:1.18) as a component of Red Hat Enterprise Linux AppStream (v. 8)
+26 more not shown

✅ Remediation

For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258

🔗 CVE IDs covered (1)

📋 Description

🎯 Affected products56

✅ Remediation

🔗 References (4)