Insecure processing of uploaded files in Django



Published: 2021-05-04
Risk High
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2021-31542
CWE-ID CWE-434
Exploitation vector Network
Public exploit N/A
Vulnerable software
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Django
Web applications / CMS

Vendor Django Software Foundation

Security Bulletin

This security bulletin contains one high risk vulnerability.

1) Arbitrary file upload

EUVDB-ID: #VU52842

Risk: High

CVSSv3.1:

CVE-ID: CVE-2021-31542

CWE-ID: CWE-434 - Unrestricted Upload of File with Dangerous Type

Exploit availability: No

Description

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to insufficient validation of file during file upload via the MultiPartParser, UploadedFile, and FieldFile methods. A remote attacker can upload a file with a specially crafted filename containing directory traversal characters and overwrite arbitrary files on the system.

Successful exploitation of the vulnerability may allow an attacker to compromise the affected system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Django: 3.0 - 3.2, 2.2 - 2.2.20


CPE2.3 External links

http://www.djangoproject.com/weblog/2021/may/04/security-releases/

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?



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