SB2017121460 - Path traversal in vBulletin

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Main Vulnerability Database SB2017121460

SB2017121460 - Path traversal in vBulletin

Published: December 14, 2017 Updated: August 8, 2020

Security Bulletin ID SB2017121460
Severity
High
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Code execution

Breakdown by Severity

High 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 security vulnerability.


1) Path traversal (CVE-ID: CVE-2017-17671)

The vulnerability allows a remote non-authenticated attacker to execute arbitrary code.

vBulletin through 5.3.x on Windows allows remote PHP code execution because a require_once call is reachable with an unauthenticated request that can include directory traversal sequences to specify an arbitrary pathname, and because ../ traversal is blocked but .. traversal is not blocked. For example, an attacker can make an invalid HTTP request containing PHP code, and then make an index.php?routestring= request with enough instances of ".." to reach an Apache HTTP Server log file.


Remediation

Install update from vendor's website.

References