CVE-2020-13671

CVE Published	2020-11-20
Related CWE(s)	CWE-434: Unrestricted Upload of File with Dangerous Type
Related Vendor(s)	fedoraproject, drupal
Related Product(s)	fedora, drupal
Exploitation Reported (CISA KEV)	2022-01-18
CVSS 3 Base Score	8.8 (HIGH)
CVSS 3 Attack Complexity	LOW
CVSS 3 Attack Vector	NETWORK

Drupal core does not properly sanitize certain filenames on uploaded files, which can lead to files being interpreted as the incorrect extension and served as the wrong MIME type or executed as PHP for certain hosting configurations. This issue affects: Drupal Drupal Core 9.0 versions prior to 9.0.8, 8.9 versions prior to 8.9.9, 8.8 versions prior to 8.8.11, and 7 versions prior to 7.74.

Cyber Threat Graph Context

Explore how this CVE relates to the wider threat graph

Associated CAPEC Patterns

Accessing Functionality Not Properly Constrained by ACLs (CAPEC-1)

In applications, particularly web applications, access to functionality is mitigated by an authorization framework. This framework maps Access Control Lists (ACLs) to elements of the application's functionality; particularly URL's for web apps. In the case that the administrator failed to specify an ACL for a particular element, an attacker may be able to access it with impunity. An attacker with the ability to access functionality not properly constrained by ACLs can obtain sensitive information and possibly compromise the entire application. Such an attacker can access resources that must be available only to users at a higher privilege level, can access management sections of the application, or can run queries for data that they otherwise not supposed to.

References

CVE-2020-13671

Cyber Threat Graph Context

Associated CAPEC Patterns

Accessing Functionality Not Properly Constrained by ACLs (CAPEC-1)

References

CVE.org

NIST National Vulnerability Database

CISA Known Exploited Vulnerabilities