SB2017121801 - Multiple remote code execution vulnerabilities in vBulletin
Published: December 18, 2017 Updated: June 2, 2020
Security Bulletin ID
SB2017121801
Severity
High
Patch available
YES
Number of vulnerabilities
2
Exploitation vector
Remote access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 2 secuirty vulnerabilities.
1) PHP code injection (CVE-ID: N/A)
The vulnerability allows a remote attacker to execute arbitrary code on the target system.The weakness exists in vBulletin installations on Windows OS due to the file inclusion vulnerability with parameter "routestring". A remote unauthenticated attacker can send a GET request to /index.php, inject malicious PHP code into a file on the server (e.g. access.log), “include” that file in the request and execute arbitrary PHP code.
Successful exploitation of the vulnerability may result in system compromise.
2) Deserialization of untrusted data (CVE-ID: CVE-2017-17672)
The vulnerability allows a remote attacker to execute arbitrary code on the target system.The weakness exists due to unsafe usage of PHP’s unserialize() on user-supplied input. A remote attacker can trigger a flaw in vB_Library_Template’s cacheTemplates() function, fetch information on a set of given templates from the database in order to store them inside a cache variable, delete arbitrary files and execute arbitrary code on a vBulletin installation.
Successful exploitation of the vulnerability may result in system compromise.
Remediation
Install update from vendor's website.