Missing Access Check in extension "Frontend User Registration" (sf_register)

It has been discovered that the extension "Frontend User Registration" (sf_register) lacks a proper access check.

Release Date: May 24, 2016

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

Affected Versions: version 6.2.7 and below

Vulnerability Type: Missing Access Check

Severity: Critical

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

Problem Description: Failing to properly sanitize user input, the extension might be vulnerable to information disclosure or remote code execution.

Solution: Updated versions 1.4.3, 6.0.4 and 6.2.8 are available from the TYPO3 Extension Manager and at https://typo3.org/extensions/repository/download/sf_register/1.4.3/t3x/, https://typo3.org/extensions/repository/download/sf_register/6.0.4/t3x/ and http://typo3.org/extensions/repository/download/sf_register/6.2.8/t3x/. Users of the extension are advised to update the extension as soon as possible.

Note: Further information can be found in the TYPO3-CORE-SA-2016-013 advisory.

Credits: Credits go to Oliver Hader who discovered and reported the vulnerability.

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.