SQL Injection in extension "http:BL Blocking" (mh_httpbl)

It has been discovered that the extension "http:BL Blocking" (mh_httpbl) is susceptible to SQL Injection.

Release Date: September 30, 2015

Component Type: Third party extension. This extension is not a part of the TYPO3 default installation.

Affected Versions:  version 1.1.7 and below

Vulnerability Type: SQL Injection

Severity: High

Suggested CVSS v2.0: AV:N/AC:L/Au:S/C:C/I:C/A:N/E:F/RL:U/RC:C (What's that?)

Problem Description: Failing to properly sanitize user-supplied input, the extension is vulnerable to SQL Injection. A valid backend login with permission to access the backend module is required to exploit this vulnerability.

Solution: Versions of this extension that are known to be vulnerable will no longer be available for download from the TYPO3 Extension Repository. The extension author failed in providing a security fix for the reported vulnerability in a decent amount of time. Please uninstall and delete the extension from your installation.

Credits: Credits go to Wouter van Dongen who discovered and reported the issue.

General advice: Follow the recommendations that are given in the TYPO3 Security Guide. Please subscribe to the typo3-announce mailing list to receive future Security Bulletins via E-mail.