WordPress Core < 5.0 - Denial of Service

2018-02-05 00:00

Barak Tawily

Strategic Overview

Status

Patched in 5.0

Affected CoreWordPress 5.0

Affected Version< 5.0

CVSS7.5High

CVECVE-2018-6389

View all WordPress 5.0 vulnerabilities

Vulnerability Overview

In WordPress before 5.0, unauthenticated attackers can cause a denial of service (resource consumption) by using the large list of registered .js files (from wp-includes/script-loader.php) to construct a series of requests to load every file many times. It looks like most of the slowness was due to forcing PHP to repeatedly compress the output scripts, which was addressed in 5.0.

Technical Analysis

REMEDIATION: Update to version 5.0, or a newer patched version --- IDENTIFIER: CWE-400 (Uncontrolled Resource Consumption) The product does not properly control the allocation and maintenance of a limited resource.

External References

https://www.cve.org/CVERecord?id=CVE-2018-6389 https://www.wordfence.com/threat-intel/vulnerabilities/id/1d5987cd-1304-487c-8d1c-cab0510fbb84

CVSS Vector

7.5

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Base

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
User InteractionNone
ScopeUnchanged
ConfidentialityNone
IntegrityNone
AvailabilityHigh

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