CVE-2020-26251

Published: Dic 18, 2020 Last Modified: Nov 21, 2024 EU-VD ID: EUVD-2020-18847 Aliases: GSD-2020-26251
ExploitDB:
Other exploit source:
Google Dorks:
MEDIUM 4,7
Source: [email protected]
Attack Vector: network
Attack Complexity: high
Privileges Required: none
User Interaction: required
Scope: changed
Confidentiality: low
Integrity: low
Availability: none
MEDIUM 4,3
Source: [email protected]
Access Vector: network
Access Complexity: medium
Authentication: none
Confidentiality: none
Integrity: partial
Availability: none

Description

AI Translation Available

Open Zaak is a modern, open-source data- and services-layer to enable zaakgericht werken, a Dutch approach to case management. In Open Zaak before version 1.3.3 the Cross-Origin-Resource-Sharing policy in Open Zaak is currently wide open - every client is allowed. This allows evil.com to run scripts that perform AJAX calls to known Open Zaak installations, and the browser will not block these. This was intended to only apply to development machines running on localhost/127.0.0.1. Open Zaak 1.3.3 disables CORS by default, while it can be opted-in through environment variables. The vulnerability does not actually seem exploitable because: a) The session cookie has a `Same-Site: Lax` policy which prevents it from being sent along in Cross-Origin requests. b) All pages that give access to (production) data are login-protected c) `Access-Control-Allow-Credentials` is set to `false` d) CSRF checks probably block the remote origin, since they're not explicitly added to the trusted allowlist.

EPSS (Exploit Prediction Scoring System)

Trend Analysis

EPSS (Exploit Prediction Scoring System)

Prevede la probabilità di sfruttamento basata su intelligence sulle minacce e sulle caratteristiche della vulnerabilità.

EPSS Score
0,0023
Percentile
0,5th
Updated

EPSS Score Trend (Last 90 Days)

346

Origin Validation Error

Draft
Abstraction: Class Structure: Simple
Common Consequences
Security Scopes Affected:
Other Access Control
Potential Impacts:
Gain Privileges Or Assume Identity Varies By Context
Applicable Platforms
Technologies: Not Technology-Specific, Web Based
View CWE Details
Application

Open Zaak by Openzaak

Product Information
Vendor Openzaak
Product Open Zaak
Version Range Affected
To 1.3.3 (exclusive)
cpe:2.3:a:openzaak:open_zaak:*:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
https://github.com/open-zaak/open-zaak/blob/master/CHANGELO…
Release Notes Third Party Advisory
https://github.com/open-zaak/open-zaak/blob/master/CHANGELOG.rst#133-2020-12-17
https://github.com/open-zaak/open-zaak/commit/952269269f1b6…
Patch Third Party Advisory
https://github.com/open-zaak/open-zaak/commit/952269269f1b629fce9c94485f83ac13f…
https://github.com/open-zaak/open-zaak/security/advisories/…
Third Party Advisory
https://github.com/open-zaak/open-zaak/security/advisories/GHSA-chhr-gxrg-64x7
https://github.com/open-zaak/open-zaak/blob/master/CHANGELO…
Release Notes Third Party Advisory
https://github.com/open-zaak/open-zaak/blob/master/CHANGELOG.rst#133-2020-12-17
https://github.com/open-zaak/open-zaak/commit/952269269f1b6…
Patch Third Party Advisory
https://github.com/open-zaak/open-zaak/commit/952269269f1b629fce9c94485f83ac13f…
https://github.com/open-zaak/open-zaak/security/advisories/…
Third Party Advisory
https://github.com/open-zaak/open-zaak/security/advisories/GHSA-chhr-gxrg-64x7