nginx before versions 1.15.6, 1.14.1 has a vulnerability in the ngx_http_mp4_module, which might allow an attacker to cause infinite loop in a worker process, cause a worker process crash, or might result in worker process memory disclosure by using a specially crafted mp4 file. The issue only affects nginx if it is built with the ngx_http_mp4_module (the module is not built by default) and the .mp4. directive is used in the configuration file. Further, the attack is only possible if an attacker is able to trigger processing of a specially crafted mp4 file with the ngx_http_mp4_module.
CVE-2018-16845
MEDIUMNVD 6.16.1—Elevated
EchelonGraph scoreMEDIUM confidence
Score 6.1 from GitHub Security Advisory published 2022-05-13. NVD baseline CVSS 6.1; sources differ by 0.0.
Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
6.1EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
- Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 10%CVSS: 6.1Exploit: Elevated riskExposed: 0
A fix is available — apply it.
- CVSS v3
- 6.1
- EG Score
- 6.1(medium)
- EG Risk
- 48(Track)EG Risk 48/100SSVC: Track
EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).
How it’s computedSeverity61% × 45%Exploitation40% × 40%Automatability30% × 15%Action: Routine — remediate on your standard cadence. - EPSS PROB
- 10%
- EPSS %ILE
- 95%
- KEV
- Not listed
Published
November 7, 2018
Last Modified
November 21, 2024
References (28)
- secalert@redhathttp://lists.opensuse.org/opensuse-security-announce/2019-09/msg00035.html
- secalert@redhathttp://mailman.nginx.org/pipermail/nginx-announce/2018/000221.html
- secalert@redhathttp://seclists.org/fulldisclosure/2021/Sep/36
- secalert@redhathttp://www.securityfocus.com/bid/105868
- secalert@redhathttp://www.securitytracker.com/id/1042039
- secalert@redhathttps://access.redhat.com/errata/RHSA-2018:3652
- secalert@redhathttps://access.redhat.com/errata/RHSA-2018:3653
- secalert@redhathttps://access.redhat.com/errata/RHSA-2018:3680
- secalert@redhathttps://access.redhat.com/errata/RHSA-2018:3681
- secalert@redhathttps://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16845
- secalert@redhathttps://lists.debian.org/debian-lts-announce/2018/11/msg00010.html
- secalert@redhathttps://support.apple.com/kb/HT212818
- secalert@redhathttps://usn.ubuntu.com/3812-1/
- secalert@redhathttps://www.debian.org/security/2018/dsa-4335
- af854a3a-2127-422b-91ae-364da2661108http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00035.html
Patch Availability(5)
| Vendor / Ecosystem | Fixed in / Patch | Released | Source |
|---|---|---|---|
| ubuntu | nginx-light (1.10.3-0ubuntu0.16.04.3) @ xenial | 2026-05-28 | ubuntu |
| redhat | rh-nginx114-nginx-1:1.14.1-1.el7 | 2018-11-27 | redhat |
| redhat | rh-nginx112-nginx-1:1.12.1-2.el7.1 | 2018-11-27 | redhat |
| redhat | rh-nginx18-nginx-1:1.8.1-1.el7.1 | 2018-11-26 | redhat |
| redhat | rh-nginx110-nginx-1:1.10.2-8.el7.1 | 2018-11-26 | redhat |
Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.
Affected Packages
(25 across 25 ecosystems)
Alpine:v3.10(1)
| Package | Vulnerable range | Fixed in | Dependents |
|---|---|---|---|
| nginx | — | 1.14.1-r0 | — |
Alpine:v3.11(1)
| Package | Vulnerable range | Fixed in | Dependents |
|---|---|---|---|
| nginx | — | 1.14.1-r0 | — |
Alpine:v3.12(1)
| Package | Vulnerable range | Fixed in | Dependents |
|---|---|---|---|
| nginx | — | 1.14.1-r0 | — |
Alpine:v3.13(1)
| Package | Vulnerable range | Fixed in | Dependents |
|---|---|---|---|
| nginx | — | 1.14.1-r0 | — |
Alpine:v3.14(1)
| Package | Vulnerable range | Fixed in | Dependents |
|---|---|---|---|
| nginx | — | 1.14.1-r0 | — |
Alpine:v3.15(1)
| Package | Vulnerable range | Fixed in | Dependents |
|---|---|---|---|
| nginx | — | 1.14.1-r0 | — |
Alpine:v3.16(1)
| Package | Vulnerable range | Fixed in | Dependents |
|---|---|---|---|
| nginx | — | 1.14.1-r0 | — |
Alpine:v3.17(1)
| Package | Vulnerable range | Fixed in | Dependents |
|---|---|---|---|
| nginx | — | 1.14.1-r0 | — |
Alpine:v3.18(1)
| Package | Vulnerable range | Fixed in | Dependents |
|---|---|---|---|
| nginx | — | 1.14.1-r0 | — |
Alpine:v3.19(1)
| Package | Vulnerable range | Fixed in | Dependents |
|---|---|---|---|
| nginx | — | 1.14.1-r0 | — |
Alpine:v3.20(1)
| Package | Vulnerable range | Fixed in | Dependents |
|---|---|---|---|
| nginx | — | 1.14.1-r0 | — |
Alpine:v3.21(1)
| Package | Vulnerable range | Fixed in | Dependents |
|---|---|---|---|
| nginx | — | 1.14.1-r0 | — |
Alpine:v3.22(1)
| Package | Vulnerable range | Fixed in | Dependents |
|---|---|---|---|
| nginx | — | 1.14.1-r0 | — |
Alpine:v3.23(1)
| Package | Vulnerable range | Fixed in | Dependents |
|---|---|---|---|
| nginx | — | 1.14.1-r0 | — |
Alpine:v3.24(1)
| Package | Vulnerable range | Fixed in | Dependents |
|---|---|---|---|
| nginx | — | 1.14.1-r0 | — |
Alpine:v3.6(1)
| Package | Vulnerable range | Fixed in | Dependents |
|---|---|---|---|
| nginx | — | 1.12.2-r2 | — |
Alpine:v3.7(1)
| Package | Vulnerable range | Fixed in | Dependents |
|---|---|---|---|
| nginx | — | 1.12.1-r4 | — |
Alpine:v3.8(1)
| Package | Vulnerable range | Fixed in | Dependents |
|---|---|---|---|
| nginx | — | 1.14.1-r0 | — |
Alpine:v3.9(1)
| Package | Vulnerable range | Fixed in | Dependents |
|---|---|---|---|
| nginx | — | 1.14.1-r0 | — |
Debian:11(1)
| Package | Vulnerable range | Fixed in | Dependents |
|---|---|---|---|
| nginx | — | 1.14.1-1 | — |
Debian:12(1)
| Package | Vulnerable range | Fixed in | Dependents |
|---|---|---|---|
| nginx | — | 1.14.1-1 | — |
Debian:13(1)
| Package | Vulnerable range | Fixed in | Dependents |
|---|---|---|---|
| nginx | — | 1.14.1-1 | — |
Debian:14(1)
| Package | Vulnerable range | Fixed in | Dependents |
|---|---|---|---|
| nginx | — | 1.14.1-1 | — |
Debian:8(1)
| Package | Vulnerable range | Fixed in | Dependents |
|---|---|---|---|
| nginx | 1.6.2-5 ... 1.6.2-5+deb8u5 (9 versions) | 1.6.2-5+deb8u6 | — |
Debian:9(1)
| Package | Vulnerable range | Fixed in | Dependents |
|---|---|---|---|
| nginx | 1.10.3-1, 1.10.3-1+deb9u1, 1.10.3-1+deb9u1~bpo8+1, 1.10.3-1+deb9u1~bpo8+2 | 1.10.3-1+deb9u2 | — |
All Vendor Advisories
(5)
Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.
- Red HatRHSA-2018:3652IMPORTANT2018-11-06
RHSA-2018:3652 — Important
- Red HatRHSA-2018:3653IMPORTANT2018-11-06
RHSA-2018:3653 — Important
- Red HatRHSA-2018:3680IMPORTANT2018-11-06
RHSA-2018:3680 — Important
- Red HatRHSA-2018:3681IMPORTANT2018-11-06
RHSA-2018:3681 — Important
- UbuntuUSN-3812-1MEDIUM
nginx vulnerabilities
Frequently asked(5)
What is CVE-2018-16845?
CVE-2018-16845 is a medium vulnerability published on November 7, 2018. nginx before versions 1.15.6, 1.14.1 has a vulnerability in the ngxhttpmp4module, which might allow an attacker to cause infinite loop in a worker process, cause a worker process crash, or might result in worker process memory disclosure by using a specially crafted mp4 file. The issue only affects…
When was CVE-2018-16845 disclosed?
CVE-2018-16845 was first published in the National Vulnerability Database on November 7, 2018, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2018-16845 actively exploited?
CVE-2018-16845 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 10% probability of exploitation in the next 30 days, which ranks it in the top 4.8% of all scored CVEs.
What is the CVSS score of CVE-2018-16845?
CVE-2018-16845 has a CVSS v3 base score of 6.1 (NVD).
How do I remediate CVE-2018-16845?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2018-16845, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.
Dependency Blast Radius
See which npm, PyPI, Go, and Maven packages are affected by CVE-2018-16845
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