RHSA-2021:2290HighCVSS 8.1

Red Hat Security Advisory: nginx:1.16 security update

Published
June 8, 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 products168

  • Red Hat Enterprise Linux AppStream (v. 8)
  • Red Hat Enterprise Linux AppStream EUS (v. 8.1)
  • Red Hat Enterprise Linux AppStream EUS (v. 8.2)
  • nginx-1:1.16.1-1.module+el8.1.0+11153+6c3a40a9.1.aarch64 (nginx:1.16) as a component of Red Hat Enterprise Linux AppStream EUS (v. 8.1)
  • nginx-1:1.16.1-1.module+el8.1.0+11153+6c3a40a9.1.ppc64le (nginx:1.16) as a component of Red Hat Enterprise Linux AppStream EUS (v. 8.1)
  • nginx-1:1.16.1-1.module+el8.1.0+11153+6c3a40a9.1.s390x (nginx:1.16) as a component of Red Hat Enterprise Linux AppStream EUS (v. 8.1)
  • nginx-1:1.16.1-1.module+el8.1.0+11153+6c3a40a9.1.src (nginx:1.16) as a component of Red Hat Enterprise Linux AppStream EUS (v. 8.1)
  • nginx-1:1.16.1-1.module+el8.1.0+11153+6c3a40a9.1.x86_64 (nginx:1.16) as a component of Red Hat Enterprise Linux AppStream EUS (v. 8.1)
  • nginx-1:1.16.1-1.module+el8.2.0+11154+636e4c3b.1.aarch64 (nginx:1.16) as a component of Red Hat Enterprise Linux AppStream EUS (v. 8.2)
  • nginx-1:1.16.1-1.module+el8.2.0+11154+636e4c3b.1.ppc64le (nginx:1.16) as a component of Red Hat Enterprise Linux AppStream EUS (v. 8.2)
  • nginx-1:1.16.1-1.module+el8.2.0+11154+636e4c3b.1.s390x (nginx:1.16) as a component of Red Hat Enterprise Linux AppStream EUS (v. 8.2)
  • nginx-1:1.16.1-1.module+el8.2.0+11154+636e4c3b.1.src (nginx:1.16) as a component of Red Hat Enterprise Linux AppStream EUS (v. 8.2)
  • nginx-1:1.16.1-1.module+el8.2.0+11154+636e4c3b.1.x86_64 (nginx:1.16) as a component of Red Hat Enterprise Linux AppStream EUS (v. 8.2)
  • nginx-1:1.16.1-2.module+el8.4.0+11155+68135136.1.aarch64 (nginx:1.16) as a component of Red Hat Enterprise Linux AppStream (v. 8)
  • nginx-1:1.16.1-2.module+el8.4.0+11155+68135136.1.ppc64le (nginx:1.16) as a component of Red Hat Enterprise Linux AppStream (v. 8)
  • nginx-1:1.16.1-2.module+el8.4.0+11155+68135136.1.s390x (nginx:1.16) as a component of Red Hat Enterprise Linux AppStream (v. 8)
  • nginx-1:1.16.1-2.module+el8.4.0+11155+68135136.1.src (nginx:1.16) as a component of Red Hat Enterprise Linux AppStream (v. 8)
  • nginx-1:1.16.1-2.module+el8.4.0+11155+68135136.1.x86_64 (nginx:1.16) as a component of Red Hat Enterprise Linux AppStream (v. 8)
  • nginx-all-modules-1:1.16.1-1.module+el8.1.0+11153+6c3a40a9.1.noarch (nginx:1.16) as a component of Red Hat Enterprise Linux AppStream EUS (v. 8.1)
  • nginx-all-modules-1:1.16.1-1.module+el8.2.0+11154+636e4c3b.1.noarch (nginx:1.16) as a component of Red Hat Enterprise Linux AppStream EUS (v. 8.2)
  • nginx-all-modules-1:1.16.1-2.module+el8.4.0+11155+68135136.1.noarch (nginx:1.16) as a component of Red Hat Enterprise Linux AppStream (v. 8)
  • nginx-debuginfo-1:1.16.1-1.module+el8.1.0+11153+6c3a40a9.1.aarch64 (nginx:1.16) as a component of Red Hat Enterprise Linux AppStream EUS (v. 8.1)
  • nginx-debuginfo-1:1.16.1-1.module+el8.1.0+11153+6c3a40a9.1.ppc64le (nginx:1.16) as a component of Red Hat Enterprise Linux AppStream EUS (v. 8.1)
  • nginx-debuginfo-1:1.16.1-1.module+el8.1.0+11153+6c3a40a9.1.s390x (nginx:1.16) as a component of Red Hat Enterprise Linux AppStream EUS (v. 8.1)
  • nginx-debuginfo-1:1.16.1-1.module+el8.1.0+11153+6c3a40a9.1.x86_64 (nginx:1.16) as a component of Red Hat Enterprise Linux AppStream EUS (v. 8.1)
  • nginx-debuginfo-1:1.16.1-1.module+el8.2.0+11154+636e4c3b.1.aarch64 (nginx:1.16) as a component of Red Hat Enterprise Linux AppStream EUS (v. 8.2)
  • nginx-debuginfo-1:1.16.1-1.module+el8.2.0+11154+636e4c3b.1.ppc64le (nginx:1.16) as a component of Red Hat Enterprise Linux AppStream EUS (v. 8.2)
  • nginx-debuginfo-1:1.16.1-1.module+el8.2.0+11154+636e4c3b.1.s390x (nginx:1.16) as a component of Red Hat Enterprise Linux AppStream EUS (v. 8.2)
  • nginx-debuginfo-1:1.16.1-1.module+el8.2.0+11154+636e4c3b.1.x86_64 (nginx:1.16) as a component of Red Hat Enterprise Linux AppStream EUS (v. 8.2)
  • nginx-debuginfo-1:1.16.1-2.module+el8.4.0+11155+68135136.1.aarch64 (nginx:1.16) as a component of Red Hat Enterprise Linux AppStream (v. 8)
  • +138 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

🔗 References (4)