TYPO3-CORE-SA-2016-023: Insecure Unserialize in TYPO3 Backend

Categories: TYPO3 CMS created by Nicole Cordes
It has been discovered, that TYPO3 is susceptible to Insecure Unserialize.
Component Type: TYPO3 CMS Release Date: November 22, 2016

Vulnerable subcomponent: Backend

Vulnerability Type: Insecure Unserialize Affected Versions: Versions 6.2.0 to 6.2.28, 7.6.0 to 7.6.12 and 8.0.0 to 8.4.0
Severity: Medium Suggested CVSS v2.0: AV:N/AC:H/Au:S/C:P/I:P/A:P/E:P/RL:O/RC:C CVE: not assigned yet

Problem Description: Failing to properly validate incoming data, the suggest wizard is susceptible to insecure unserialize. To exploit this vulnerability a valid backend user account is needed.

Solution: Update to TYPO3 versions 6.2.29, 7.6.13 or 8.4.1 that fix the problem described.

Credits: Thanks to TYPO3 core team member Christian Kuhn 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. General Note: All security related code changes are tagged so that you can easily look them up on our review system.