TYPO3-CORE-SA-2016-010: Arbitrary File Disclosure in Form Component

Categories: TYPO3 CMS Created by Helmut Hummel
It has been discovered, that TYPO3 Form Component is susceptible to Arbitrary File Disclosure.

Component Type: TYPO3 CMS

Release Date: April 12, 2016

Vulnerable subcomponent: Form

Vulnerability Type: Arbitrary File Disclosure

Affected Versions: Versions 6.2.0 to 6.2.19

Severity: High

Suggested CVSS v2.0: AV:N/AC:L/Au:S/C:C/I:N/A:N/E:P/RL:O/RC:C

CVE: not assigned yet

Problem Description: Failing to properly validate user input, the form component is susceptible to Arbitrary File Disclosure. A valid backend user account is needed to exploit this vulnerability. Only forms are vulnerable, which contain upload fields.

Solution: Update to TYPO3 versions 6.2.20 that fix the problem described.

Credits: Thanks to Gerrit Venema who discovered and reported the issues.

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.