An issue was discovered in Flask-CORS (aka CORS Middleware for Flask) before 3.0.9. It allows ../ directory traversal to access private resources because resource matching does not ensure that pathnames are in a canonical format.

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - An issue was discovered in Flask-CORS (aka CORS Middleware for Flask) before 3.0.9. It allows ../
    directory traversal to access private resources because resource matching does not ensure that pathnames
    are in a canonical format. (CVE-2020-25032)

The version of FreeBSD installed on the remote host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the 252f40cb-618c-47f4-a2cf-1abf30cffbbe advisory.

  - An issue was discovered in Flask-CORS (aka CORS Middleware for Flask) before 3.0.9. It allows ../     directory traversal to access private resources because resource matching does not ensure that pathnames     are in a canonical format. (CVE-2020-25032)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Ubuntu 20.04 LTS host has a package installed that is affected by a vulnerability as referenced in the USN-6019-1 advisory.

    It was discovered that Flask-CORS did not properly escape paths before evaluating resource rules. An     attacker could possibly use this to expose sensitive information.

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

A directory traversal vulnerability was discovered in python-flask-cors, a Flask extension for handling Cross Origin Resource Sharing (CORS), allowing to access private resources.

This update for python-Flask-Cors fixes the following issues :

  - CVE-2020-25032: fix a relative directory traversal     vulnerability (bsc#1175986).

ID	Name	Product	Family	Severity
420419	SCA: security update for Flask-Cors (GHSA-xc3p-ff3m-f46v)	Tenable Cloud Security	SCA Checks	high
420419	SCA: security update for Flask-Cors (GHSA-xc3p-ff3m-f46v)	Tenable Self-Hosted Container Security	SCA Checks	high
180376	FreeBSD : py-Flask-Cors -- directory traversal vulnerability (252f40cb-618c-47f4-a2cf-1abf30cffbbe)	Nessus	FreeBSD Local Security Checks	high
174276	Ubuntu 20.04 LTS : Flask-CORS vulnerability (USN-6019-1)	Nessus	Ubuntu Local Security Checks	high
141651	Debian DSA-4775-1 : python-flask-cors - security update	Nessus	Debian Local Security Checks	high
140511	openSUSE Security Update : python-Flask-Cors (openSUSE-2020-1393)	Nessus	SuSE Local Security Checks	high

Detections

Analytics

CVE-2020-25032

high

Tenable Plugins

high

high

high

high

high

high