SUBJECT: Critical vBulletin RCE Vulnerability: Update Immediately (CVE-2019-16759)
TECH STACK: vBulletin 5.x through 5.5.4
DATE(S) ISSUED: 09/24/2019
NVD Last Modified: 07/21/2021
CRITICALITY: Critical (CVSS v3 Score: 9.8)
OVERVIEW:
This vulnerability (CVE-2019-16759) affects vBulletin versions 5.x through 5.5.4 and allows remote attackers to execute arbitrary code on vulnerable systems without authentication. This can lead to complete compromise of the affected system, including data theft, malware installation, and disruption of services. Exploited in the wild, it poses a significant security risk.
MITIGATION/SOLUTION:
The primary mitigation for this vulnerability is to update vBulletin to the latest patched version (5.5.5 or later). This patch addresses the underlying code injection vulnerability and prevents attackers from exploiting it.
- Restrict access to the vBulletin administration panel to trusted users only.
- Implement strong passwords and enable two-factor authentication for administrator accounts.
- Regularly scan your vBulletin installation for vulnerabilities and apply security patches promptly.
- Consider alternative forum software if updating vBulletin is not feasible
Confirmation & Additional Information:
- This vulnerability is included in CISA's Known Exploited Vulnerabilities Catalog, requiring immediate patching.
- The vulnerability exploits a code injection flaw in the vBulletin PHP module.
- For detailed technical information and exploit examples, refer to the third-party advisories listed below.
REFERENCES:
Third Party Advisories:
- NVD Entry
- CISA Known Exploited Vulnerabilities Catalog
- Packet Storm
- Ars Technica
