SB2019100801 - Multiple vulnerabilities in vBulletin

Description

This security bulletin contains information about 2 secuirty vulnerabilities.

1) SQL injection (CVE-ID: CVE-2019-17271)

The vulnerability allows a remote attacker to execute arbitrary SQL queries in database.

The vulnerability exists due to insufficient sanitization of user-supplied data passed via "where" parameter to "ajax/api/hook/getHookList" or "ajax/api/widget/getWidgetList" API endpoints. A remote authenticated attacker with "canadminproducts", "canadminstyles" (1) or "canusesitebuilder" (2) permissions can send a specially crafted request to the affected application and execute arbitrary SQL commands within the application database.

Successful exploitation of this vulnerability may allow a remote attacker to read, delete, modify data in database and gain complete control over the affected application.

2) PHP Code Injection (CVE-ID: CVE-2019-17132)

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to improper input validation in the " ajax/api/user/updateAvatar" endpoint when processing data passed via the "data[filedata" HTTP POST parameter. A remote authenticated attacker can send a specially crafted request to the Avatar update script and execute arbitrary PHP code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Remediation

Install update from vendor's website.

References

• http://karmainsecurity.com/KIS-2019-01
• https://seclists.org/fulldisclosure/2019/Oct/8
• https://forum.vbulletin.com/forum/vbulletin-announcements/vbulletin-announcements_aa/4423646-vbulletin-5-5-x-5-5-2-5-5-3-and-5-5-4-security-patch-level-2
• http://karmainsecurity.com/pocs/CVE-2019-17132