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TYPO3-EXT-SA-2014-006: Captcha Bypass in extension "powermail" (powermail)

It has been discovered that the extension "powermail" (powermail) is susceptible to Captcha Bypass

Release Date: April 10, 2014

Bulletin update: September 18, 2014 (added CVE)

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

Affected Versions: powermail: Version 2.0.0 - 2.0.10

Vulnerability Type: Captcha Bypass

Severity: Low

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

CVE: CVE-2014-6288

Problem Description: The extension powermail offers the use of a captch validation to secure forms. It was possible to bypass the captcha validation and submit forms.

Important Note: Other field validators weren't involved so any other validation worked as expected.

Solution: Updated version 2.0.11 is available from the TYPO3 extension manager and at http://typo3.org/extensions/repository/download/powermail/2.0.11/t3x/. Users of the extension are advised to update the extension as soon as possible as long as they use captchas in their forms.

Credits: Credits go to Jigal van Hemert who discovered and reported this 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.