Vulnerabilities
Misconfiguration
Compliance
CVE Vulnerabilities

CVE-2018-16844

Uncontrolled Resource Consumption

Published: Nov 07, 2018 | Modified: Nov 21, 2024
CVSS 3.x
7.5
HIGH
Source:
NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 2.x
7.8 HIGH
AV:N/AC:L/Au:N/C:N/I:N/A:C
RedHat/V2
RedHat/V3
5.3 MODERATE
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Ubuntu
MEDIUM
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Additional information
NVDhttps://nvd.nist.gov/vuln/detail/CVE-2018-16844
CWEhttps://cwe.mitre.org/data/definitions/400.html

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.

Weakness

The product does not properly control the allocation and maintenance of a limited resource.

Affected Software

NameVendorStart VersionEnd Version
NginxF51.9.5 (including)1.14.1 (excluding)
NginxF51.15.0 (including)1.15.6 (excluding)
Red Hat Software Collections for Red Hat Enterprise Linux 7RedHatrh-nginx112-nginx-1:1.12.1-2.el7.1*
Red Hat Software Collections for Red Hat Enterprise Linux 7RedHatrh-nginx114-nginx-1:1.14.1-1.el7*
Red Hat Software Collections for Red Hat Enterprise Linux 7.4 EUSRedHatrh-nginx112-nginx-1:1.12.1-2.el7.1*
Red Hat Software Collections for Red Hat Enterprise Linux 7.4 EUSRedHatrh-nginx114-nginx-1:1.14.1-1.el7*
Red Hat Software Collections for Red Hat Enterprise Linux 7.5 EUSRedHatrh-nginx112-nginx-1:1.12.1-2.el7.1*
Red Hat Software Collections for Red Hat Enterprise Linux 7.5 EUSRedHatrh-nginx114-nginx-1:1.14.1-1.el7*
Red Hat Software Collections for Red Hat Enterprise Linux 7.6 EUSRedHatrh-nginx112-nginx-1:1.12.1-2.el7.1*
Red Hat Software Collections for Red Hat Enterprise Linux 7.6 EUSRedHatrh-nginx114-nginx-1:1.14.1-1.el7*
NginxUbuntubionic*
NginxUbuntucosmic*
NginxUbuntudevel*
NginxUbuntuesm-infra/bionic*
NginxUbuntuesm-infra/xenial*
NginxUbuntuupstream*
NginxUbuntuxenial*

Potential Mitigations

  • Mitigation of resource exhaustion attacks requires that the target system either:

  • The first of these solutions is an issue in itself though, since it may allow attackers to prevent the use of the system by a particular valid user. If the attacker impersonates the valid user, they may be able to prevent the user from accessing the server in question.

  • The second solution is simply difficult to effectively institute – and even when properly done, it does not provide a full solution. It simply makes the attack require more resources on the part of the attacker.

References

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