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TYPO3-EXT-SA-2013-006: Security Bypass Vulnerability in extension powermail (powermail)

It has been discovered that the extension "powermail" (powermail) is susceptible to Security Bypass Vulnerability.

Release Date: June 03, 2013

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

Affected Versions: Version 1.6.9 and below, 2.0.1 - 2.0.6

Vulnerability Type: Security Bypass

Severity: Low

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

Problem Description: Failing to invalidate used captcha codes, Powermail allows to use a single captcha code for multiple transmissions. And attacker could bypass further captcha checks by using the same captcha code.

Solution: An updated version 1.6.10 is available from the TYPO3 extension manager and at http://typo3.org/extensions/repository/download/powermail/1.6.10/t3x/. An updated version 2.0.7 is available from the TYPO3 extension manager and at http://typo3.org/extensions/repository/download/powermail/2.0.7/t3x/. Users of the extension are advised to update the extension as soon as possible.

Credits: Credits go to Oliver Meyfarth who discovered and reported this issue.

Update Note: For TYPO3 4.5 use version 1.6.10 of powermail, for TYPO3 4.6/4.7 use version 2.0.7.
Follow these steps if you want to update to version 1.6.10: In the extension manager go to "Import Extensions", search for "powermail" and the make a right-click on the extension entry, select "import versions for powermail". Then you will have the possibility to install version 1.6.10

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.