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Fencer Vulns
high 8.2

CVE-2018-16845 json

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 i…

published 2018-11-07 8 y ago modified 2026-06-17 4 mo ago also EUVD-2018-8641

cvss
8.2
version 3.0, CNA
cisa kev
Not listed
not in CISA's catalog
epss
9.8%
EPSS 9.8% chance of exploitation in 30 days, percentile 95%
public exploits
0
none known

Summary

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.

Patch / fix

  • apple xcode 13.0
  • nginx Debian 14, Debian 13, Debian 12 1.14.1-1

debian advisories DEBIAN-CVE-2018-16845

  • nginx Ubuntu 14.04 LTS 1.4.6-1ubuntu3.9
  • nginx Ubuntu 16.04 LTS 1.10.3-0ubuntu0.16.04.3
  • nginx Ubuntu 18.04 LTS 1.14.0-0ubuntu1.2

ubuntu advisories UBUNTU-CVE-2018-16845

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • rh-nginx114-nginx RHEL 3 SOFTWARE_COLLECTIONS 1:1.14.1-1.el7
  • rh-nginx114-nginx-mod-mail RHEL 3 SOFTWARE_COLLECTIONS 1:1.14.1-1.el7
  • rh-nginx114-nginx-mod-stream RHEL 3 SOFTWARE_COLLECTIONS 1:1.14.1-1.el7
  • rh-nginx114-nginx-mod-http-perl RHEL 3 SOFTWARE_COLLECTIONS 1:1.14.1-1.el7
  • rh-nginx114-nginx-mod-http-xslt-filter RHEL 3 SOFTWARE_COLLECTIONS 1:1.14.1-1.el7
  • rh-nginx114-nginx-mod-http-image-filter RHEL 3 SOFTWARE_COLLECTIONS 1:1.14.1-1.el7
  • rh-nginx112-nginx RHEL 3 SOFTWARE_COLLECTIONS 1:1.12.1-2.el7.1
  • rh-nginx112-nginx-mod-mail RHEL 3 SOFTWARE_COLLECTIONS 1:1.12.1-2.el7.1

red hat advisories RHSA-2018:3681RHSA-2018:3680RHSA-2018:3652RHSA-2018:3653

  • nginx SLE Module for Server Applications 15 SP1 1.14.2-6.3.1
  • nginx SLE Module for Server Applications 15 1.14.2-3.3.1

suse advisories SUSE-SU-2019:2309-1SUSE-SU-2019:0334-1

  • nginx openSUSE Tumbleweed 1.21.3-1.4
  • nginx openSUSE Leap 15.1 1.14.2-lp151.4.3.1
  • nginx Package Hub 12, openSUSE Leap 15.0 1.14.2-16.1

opensuse advisories openSUSE-SU-2024:11092-1openSUSE-SU-2019:2120-1openSUSE-SU-2019:0195-1

  • nginx Alpine 3.24, Alpine 3.23, Alpine 3.22 +14 more 1.14.1-r0
  • nginx Alpine 3.6 1.12.2-r2
  • nginx Alpine 3.7 1.12.1-r4

alpine advisories ALPINE-CVE-2018-16845

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2018-16845 updated cvss 8.2

nginx: Denial of service and memory disclosure via mp4 module

  • Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 6) rh-nginx18-nginx 1.8.1-1.el6.1, rh-nginx110-nginx 1.10.2-8.el6.1, rh-nginx110-nginx-mod-mail 1.10.2-8.el6.1, rh-nginx110-nginx-mod-stream 1.10.2-8.el6.1, rh-nginx110-nginx-mod-http-perl 1.10.2-8.el6.1, rh-nginx110-nginx-mod-http-xslt-filter 1.10.2-8.el6.1, +1 more Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 7) rh-nginx114-nginx 1.14.1-1.el7, rh-nginx18-nginx 1.8.1-1.el7.1, rh-nginx110-nginx 1.10.2-8.el7.1, rh-nginx112-nginx 1.12.1-2.el7.1, rh-nginx114-nginx-mod-mail 1.14.1-1.el7, rh-nginx110-nginx-mod-mail 1.10.2-8.el7.1, +13 more Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.4) rh-nginx114-nginx 1.14.1-1.el7, rh-nginx18-nginx 1.8.1-1.el7.1, rh-nginx110-nginx 1.10.2-8.el7.1, rh-nginx112-nginx 1.12.1-2.el7.1, rh-nginx114-nginx-mod-mail 1.14.1-1.el7, rh-nginx110-nginx-mod-mail 1.10.2-8.el7.1, +13 more Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.5) rh-nginx114-nginx 1.14.1-1.el7, rh-nginx18-nginx 1.8.1-1.el7.1, rh-nginx110-nginx 1.10.2-8.el7.1, rh-nginx112-nginx 1.12.1-2.el7.1, rh-nginx114-nginx-mod-mail 1.14.1-1.el7, rh-nginx110-nginx-mod-mail 1.10.2-8.el7.1, +13 more Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.6) rh-nginx114-nginx 1.14.1-1.el7, rh-nginx18-nginx 1.8.1-1.el7.1, rh-nginx110-nginx 1.10.2-8.el7.1, rh-nginx112-nginx 1.12.1-2.el7.1, rh-nginx114-nginx-mod-mail 1.14.1-1.el7, rh-nginx110-nginx-mod-mail 1.10.2-8.el7.1, +13 more Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 6) rh-nginx18-nginx 1.8.1-1.el6.1, rh-nginx110-nginx 1.10.2-8.el6.1, rh-nginx110-nginx-mod-mail 1.10.2-8.el6.1, rh-nginx110-nginx-mod-stream 1.10.2-8.el6.1, rh-nginx110-nginx-mod-http-perl 1.10.2-8.el6.1, rh-nginx110-nginx-mod-http-xslt-filter 1.10.2-8.el6.1, +1 more
    +1 more products
    Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 7) rh-nginx114-nginx 1.14.1-1.el7, rh-nginx18-nginx 1.8.1-1.el7.1, rh-nginx110-nginx 1.10.2-8.el7.1, rh-nginx112-nginx 1.12.1-2.el7.1, rh-nginx114-nginx-mod-mail 1.14.1-1.el7, rh-nginx110-nginx-mod-mail 1.10.2-8.el7.1, +13 more
    fixed: vendor fix RHSA-2018:3653
  • Red Hat CloudForms Management Engine 5 nginx, nginx-mod-mail, nginx-filesystem, nginx-mod-stream, nginx-all-modules, nginx-mod-http-perl, +3 more Red Hat Ansible Tower 3 nginx Red Hat Enterprise Linux 8 nginx, nginx-mod-mail, nginx-filesystem, nginx-mod-stream, nginx-all-modules, nginx-mod-http-perl, +2 more
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

9.84% chance of exploitation in the next 30 days, higher than 95% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.0 8.2 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
NVD 3.1 6.1 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H
NVD 2.0 5.8 AV:N/AC:M/Au:N/C:P/I:N/A:P

Affected products

  • [UNKNOWN] nginx

Classification

Weakness
  • CWE-400 Uncontrolled Resource Consumption
  • CWE-835 Loop with Unreachable Exit Condition
Technology feeds

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.