TYPO3-EXT-SA-2017-012: Arbitrary File Disclosure in extension "restler" (restler)

November 07, 2017

Category: TYPO3 Extension
Author: Torben Hansen
Keywords: TYPO3, security, typo3-ext-sa-2017-012, extension, restler, Arbitrary File Disclosure

It has been discovered that the extension "restler" (restler) is susceptible to Arbitrary File Disclosure.

Release Date: November 07, 2017

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

Affected Versions: version 1.7.0 and below

Vulnerability Type: Arbitrary File Disclosure

Severity: Medium

Suggested CVSS v3.0: AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C (What's that?)

CVE: not assigned yet

Problem Description: The extensions includes a vulnerable version of luracast/restler, which is known to allow users to read content of arbitrary files the webserver has access to. The vulnerability is only exploitable, if access to the vendor-directory of the extension is not forbidden (e.g. by .htaccess)

Solution: An updated version 1.7.1 is available from the TYPO3 Extension Manager and at https://extensions.typo3.org/extension/download/restler/1.7.1/zip/. Users of the extension are advised to update the extension as soon as possible.

Credits: Credits go to Amine Bendouil 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.