SB2017020402 - Multiple vulnerabilities in Plone 

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Main Vulnerability Database SB2017020402

SB2017020402 - Multiple vulnerabilities in Plone

Published: February 4, 2017 Updated: August 19, 2020

Security Bulletin ID SB2017020402
Severity
Medium
Patch available
YES
Number of vulnerabilities 6
Exploitation vector Remote access
Highest impact Information disclosure

Breakdown by Severity

Medium 17% Low 83%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 6 secuirty vulnerabilities.


1) Open redirect (CVE-ID: CVE-2017-1000484)

The vulnerability allows a remote non-authenticated attacker to read and manipulate data.

By linking to a specific url in Plone 2.5-5.1rc1 with a parameter, an attacker could send you to his own website. On its own this is not so bad: the attacker could more easily link directly to his own website instead. But in combination with another attack, you could be sent to the Plone login form and login, then get redirected to the specific url, and then get a second redirect to the attacker website. (The specific url can be seen by inspecting the hotfix code, but we don't want to make it too easy for attackers by spelling it out here.)


2) Open redirect (CVE-ID: CVE-2017-1000481)

The vulnerability allows a remote non-authenticated attacker to read and manipulate data.

When you visit a page where you need to login, Plone 2.5-5.1rc1 sends you to the login form with a 'came_from' parameter set to the previous url. After you login, you get redirected to the page you tried to view before. An attacker might try to abuse this by letting you click on a specially crafted link. You would login, and get redirected to the site of the attacker, letting you think that you are still on the original Plone site. Or some javascript of the attacker could be executed. Most of these types of attacks are already blocked by Plone, using the `isURLInPortal` check to make sure we only redirect to a page on the same Plone site. But a few more ways of tricking Plone into accepting a malicious link were discovered, and fixed with this hotfix.


3) Cross-site scripting (CVE-ID: CVE-2017-1000482)

The vulnerability allows a remote authenticated user to read and manipulate data.

A member of the Plone 2.5-5.1rc1 site could set javascript in the home_page property of his profile, and have this executed when a visitor click the home page link on the author page.


4) Input validation error (CVE-ID: CVE-2017-1000483)

The vulnerability allows a remote authenticated user to gain access to sensitive information.

Accessing private content via str.format in through-the-web templates and scripts in Plone 2.5-5.1rc1. This improves an earlier hotfix. Since the format method was introduced in Python 2.6, this part of the hotfix is only relevant for Plone 4 and 5.


5) Format string error (CVE-ID: CVE-2017-5524)

The vulnerability allows a remote authenticated user to gain access to sensitive information.

Plone 4.x through 4.3.11 and 5.x through 5.0.6 allow remote attackers to bypass a sandbox protection mechanism and obtain sensitive information by leveraging the Python string format method.


6) Cross-site scripting (CVE-ID: CVE-2016-7147)

Vulnerability allows a remote attacker to perform XSS attacks.

The vulnerability is caused by an input validation error in the manage_findResult component in the search feature in Zope ZMI in Plone before 4.3.12 and 5.x before 5.0.7. A remote attacker can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code in victim's browser in security context of vulnerable website.

Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.


Remediation

Install update from vendor's website.

References