CVE-2022-23599

Cache poisoning in Products.ATContentTypes prior to version 3.0.6

• CVSS 6.1
• CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
• Configuration Issues
• Remote

Products.ATContentTypes are the core content types for Plone 2.1 – 4.3. Versions of Plone that are dependent on Products.ATContentTypes prior to version 3.0.6 are vulnerable to reflected cross site scripting and open redirect when an attacker can get a compromised version of the image_view_fullscreen page in a cache, for example in Varnish. The technique is known as cache poisoning. Any later visitor can get redirected when clicking on a link on this page. Usually only anonymous users are affected, but this depends on the user's cache settings. Version 3.0.6 of Products.ATContentTypes has been released with a fix. This version works on Plone 5.2, Python 2 only. As a workaround, make sure the image_view_fullscreen page is not stored in the cache. More information about the vulnerability and cvmitigation measures is available in the GitHub Security Advisory.

CVE

CVE-2022-23599

CWE

CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

CVSS base score

6.1

Published

2022-01-28

OWASP

A06 Vulnerable and Outdated Components

Orthogonal defect classification

Function

Code defect classification

Missing Functionality

Category

Configuration Issues

Subcategory

Open Redirects

Accessibility scope

Remote

Impact

Arbitrary Code Execution

Fixed by upgrading

Yes

Solution

Update Products.ATContentTypes to version 3.0.6 or higher.

def image_view_fullscreen(context, request):
    redirect_url = request.get('redirect', None)
    
    if redirect_url:
        return redirect(redirect_url)

    return render_image(context)

from Products.CMFCore.utils import getToolByName
from plone.api.content import get_view

def image_view_fullscreen(context, request):
    redirect_url = request.get('redirect', '')
    
    if not check_redirect_url(redirect_url):
        return "Invalid redirect URL"

    return get_view('image_view_fullscreen', context, request)()

def check_redirect_url(url):
    allowed_domains = ['example.com', 'another-example.com']
    for domain in allowed_domains:
        if url.startswith(f"http://{domain}") or url.startswith(f"https://{domain}"):
            return True
    return False

@misc{vaitp:cve202223599,
  title        = {{Cache poisoning in Products.ATContentTypes prior to version 3.0.6}},
  author       = {Bogaerts, Fr\'ed\'eric and Ivaki, Naghmeh and Fonseca, Jos\'e},
  year         = {2022},
  note         = {VAITP Python Vulnerability Dataset, entry CVE-2022-23599},
  howpublished = {\url{https://netpack.pt/vaitp/vulnerability/CVE-2022-23599/}}
}