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TI-2018-12054 Aliases CVE-2018-16844GHSA-4576-cf38-77f2

Uncontrolled resource consumption in [UNKNOWN] nginx

Priority MEDIUM 47CWE-400Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Partial Red Hat: 5 fixed, 1 without a fix

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-400.

Summary

nginx before versions 1.15.6 and 1.14.1 has a vulnerability in the implementation of HTTP/2 that can allow for excessive CPU usage. This issue affects nginx compiled with the ngx_http_v2_module (not compiled by default) if the 'http2' option of the 'listen' directive is used in a configuration file.

Why it matters now

EPSS 0.12733 96th percentileScored 2026-11-07
Fix Partial Red Hat: 2 advisoriesRed Hat: 5 fixed, 1 without a fix

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
[UNKNOWN]nginx1.15.6; 1.14.1—No fix listedCNA
  • nginx Vendor[UNKNOWN] Affected 1.15.6; 1.14.1 Fixed in — No fix listed CNA

CPE configurations NVD · 7

CPEVersionsRoleVendor
cpe:2.3:a:f5:nginx:*:*:*:*:*:*:*:*1.9.5 to before 1.14.1; 1.15.0 to before 1.15.6VulnerableF5
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*9.0VulnerableDebian
cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*14.04VulnerableCanonical
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*16.04VulnerableCanonical
cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*18.04VulnerableCanonical
cpe:2.3:o:canonical:ubuntu_linux:18.10:*:*:*:*:*:*:*18.10VulnerableCanonical
cpe:2.3:a:apple:xcode:*:*:*:*:*:*:*:*before 13.0VulnerableApple
  • cpe:2.3:a:f5:nginx:*:*:*:*:*:*:*:* Versions 1.9.5 to before 1.14.1; 1.15.0 to before 1.15.6 Vulnerable ·F5
  • cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* Versions 9.0 Vulnerable ·Debian
  • cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:* Versions 14.04 Vulnerable ·Canonical
  • cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:* Versions 16.04 Vulnerable ·Canonical
  • cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:* Versions 18.04 Vulnerable ·Canonical
  • cpe:2.3:o:canonical:ubuntu_linux:18.10:*:*:*:*:*:*:* Versions 18.10 Vulnerable ·Canonical
  • cpe:2.3:a:apple:xcode:*:*:*:*:*:*:*:* Versions before 13.0 Vulnerable ·Apple

Remediation

Red Hat 2 advisories

  • RHSA-2018:3681 Released 2018-11-27 · Red Hat rating Important
    rh-nginx114-nginx security update
    • Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 7) rh-nginx114-nginx-1:1.14.1-1.el7, rh-nginx114-nginx-mod-http-image-filter-1:1.14.1-1.el7, rh-nginx114-nginx-mod-http-perl-1:1.14.1-1.el7 +3
    • Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.4) rh-nginx114-nginx-1:1.14.1-1.el7, rh-nginx114-nginx-mod-http-image-filter-1:1.14.1-1.el7, rh-nginx114-nginx-mod-http-perl-1:1.14.1-1.el7 +3
    • Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.5) rh-nginx114-nginx-1:1.14.1-1.el7, rh-nginx114-nginx-mod-http-image-filter-1:1.14.1-1.el7, rh-nginx114-nginx-mod-http-perl-1:1.14.1-1.el7 +3
    • Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.6) rh-nginx114-nginx-1:1.14.1-1.el7, rh-nginx114-nginx-mod-http-image-filter-1:1.14.1-1.el7, rh-nginx114-nginx-mod-http-perl-1:1.14.1-1.el7 +3
    • Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 7) rh-nginx114-nginx-1:1.14.1-1.el7, rh-nginx114-nginx-mod-http-image-filter-1:1.14.1-1.el7, rh-nginx114-nginx-mod-http-perl-1:1.14.1-1.el7 +3
  • RHSA-2018:3680 Released 2018-11-27 · Red Hat rating Important
    rh-nginx112-nginx security update
    • Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 7) rh-nginx112-nginx-1:1.12.1-2.el7.1, rh-nginx112-nginx-mod-http-image-filter-1:1.12.1-2.el7.1, rh-nginx112-nginx-mod-http-perl-1:1.12.1-2.el7.1 +3
    • Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.4) rh-nginx112-nginx-1:1.12.1-2.el7.1, rh-nginx112-nginx-mod-http-image-filter-1:1.12.1-2.el7.1, rh-nginx112-nginx-mod-http-perl-1:1.12.1-2.el7.1 +3
    • Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.5) rh-nginx112-nginx-1:1.12.1-2.el7.1, rh-nginx112-nginx-mod-http-image-filter-1:1.12.1-2.el7.1, rh-nginx112-nginx-mod-http-perl-1:1.12.1-2.el7.1 +3
    • Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.6) rh-nginx112-nginx-1:1.12.1-2.el7.1, rh-nginx112-nginx-mod-http-image-filter-1:1.12.1-2.el7.1, rh-nginx112-nginx-mod-http-perl-1:1.12.1-2.el7.1 +3
    • Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 7) rh-nginx112-nginx-1:1.12.1-2.el7.1, rh-nginx112-nginx-mod-http-image-filter-1:1.12.1-2.el7.1, rh-nginx112-nginx-mod-http-perl-1:1.12.1-2.el7.1 +3

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Advisory ·

    [UNKNOWN] nginx — RHSA-2018:3680

    3 records Highest priority Priority MEDIUM 2 MEDIUM, 1 LOW

    Other records, highest priority first

    • TI-2018-12053 Uncontrolled resource consumption in [UNKNOWN] nginxPriority MEDIUM 63
    • TI-2018-12055 Uncontrolled resource consumption in [UNKNOWN] nginxPriority LOW 39
    Show all 3 records → Advisory →
  • Advisory ·

    [UNKNOWN] nginx — RHSA-2018:3681

    3 records Highest priority Priority MEDIUM 2 MEDIUM, 1 LOW

    Other records, highest priority first

    • TI-2018-12053 Uncontrolled resource consumption in [UNKNOWN] nginxPriority MEDIUM 63
    • TI-2018-12055 Uncontrolled resource consumption in [UNKNOWN] nginxPriority LOW 39
    Show all 3 records → Advisory →
Show 2 more groups
  • Advisory ·

    [UNKNOWN] nginx — USN-3812-1

    3 records Highest priority Priority MEDIUM 2 MEDIUM, 1 LOW

    Other records, highest priority first

    • TI-2018-12053 Uncontrolled resource consumption in [UNKNOWN] nginxPriority MEDIUM 63
    • TI-2018-12055 Uncontrolled resource consumption in [UNKNOWN] nginxPriority LOW 39
    Show all 3 records → Advisory →
  • Advisory ·

    [UNKNOWN] nginx — DSA-4335

    3 records Highest priority Priority MEDIUM 2 MEDIUM, 1 LOW

    Other records, highest priority first

    • TI-2018-12053 Uncontrolled resource consumption in [UNKNOWN] nginxPriority MEDIUM 63
    • TI-2018-12055 Uncontrolled resource consumption in [UNKNOWN] nginxPriority LOW 39
    Show all 3 records → Advisory →

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Software CollectionsAffectedNo fix planned: Will not fix
Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 7)Fixed RHSA-2018:3680, RHSA-2018:3681
Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.4)Fixed RHSA-2018:3680, RHSA-2018:3681
Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.5)Fixed RHSA-2018:3680, RHSA-2018:3681
Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.6)Fixed RHSA-2018:3680, RHSA-2018:3681
Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 7)Fixed RHSA-2018:3680, RHSA-2018:3681
Not affected: 4 products
  • CloudForms Management Engine 5
  • Red Hat Ansible Tower 3
  • Red Hat Enterprise Linux 8
  • Red Hat Software Collections

Timeline

  1. 2026-10-02 Threatist record created from CVE-2018-16844
  2. 2026-10-03 Alias added: GHSA-4576-cf38-77f2

References

Advisory 8

Other 1

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences