Description

WordPress is prone to a Denial of Service vulnerability which can be exploited by malicious people to cause the affected website to consume memory and CPU resources, thus denying service to legitimate users. WordPress versions 3.9.x ranging from 3.9 and up to (and including) 3.9.23 are vulnerable.

Remediation

Evaluate and apply the suggested patch

References

https://baraktawily.blogspot.ro/2018/02/how-to-dos-29-of-world-wide-websites.html

https://www.youtube.com/watch?v=nNDsGTalXS0

https://github.com/Quitten/WordPress/blob/master/wp-dos-patch.sh

https://www.exploit-db.com/exploits/43968/

https://packetstormsecurity.com/files/146249/WordPress-Core-Denial-Of-Service.html

https://www.rastating.com/protecting-wordpress-against-cve-2018-6389/

Related Vulnerabilities

MyBB Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') Vulnerability (CVE-2021-27279)

WordPress Plugin Husker Portfolio Cross-Site Request Forgery (0.3)

WordPress Plugin Facebook, Twitter & Google+ Social Widgets Multiple Vulnerabilities (1.3.7)

Apache HTTP Server Incorrect Calculation of Buffer Size Vulnerability (CVE-2004-0940)

WordPress Plugin WassUp Real Time Analytics Cross-Site Scripting (1.8.3)

Severity

High

Classification

CVE-2018-6389 CWE-400 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

Tags

Missing Update Denial Of Service