Cross-site scripting in Django

Published: 2019-06-04

Risk	Low
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2019-12308 CVE-2019-11358
CWE-ID	CWE-79 CWE-400
Exploitation vector	Network
Public exploit	Public exploit code for vulnerability #2 is available.
Vulnerable software Subscribe	Django Web applications / CMS
Vendor	Django Software Foundation

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Cross-site scripting

EUVDB-ID: #VU18672

Risk: Low

CVSSv3.1:

CVE-ID: CVE-2019-12308

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

Exploit availability: No

Description

The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.

The vulnerability exists due to insufficient sanitization of URL within the AdminURLFieldWidget. A remote attacker can trick the victim to follow a specially crafted link and display a clickable JavaScript link.

Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Django: 1.11 - 2.2.1

CPE2.3

cpe:2.3:a:django_software_foundation:django:1.11.1:*:*:*:*:*:*:*

External links

http://www.openwall.com/lists/oss-security/2019/06/03/2
http://docs.djangoproject.com/en/dev/releases/1.11.21/
http://docs.djangoproject.com/en/dev/releases/2.1.9/
http://docs.djangoproject.com/en/dev/releases/2.2.2/
http://docs.djangoproject.com/en/dev/releases/security/
http://groups.google.com/forum/#!topic/django-announce/GEbHU7YoVz8
http://www.djangoproject.com/weblog/2019/jun/03/security-releases/

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?

2) Prototype pollution

EUVDB-ID: #VU18092

Risk: Low

CVSSv3.1:

CVE-ID: CVE-2019-11358

CWE-ID: CWE-400 - Resource exhaustion

Exploit availability: Yes

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to prototype pollution. A remote attacker can trick the extend function can into modifying the prototype of Object when the attacker controls part of the structure passed to this function. This can let an attacker add or modify an existing property that will then exist on all objects and perform a denial of service (DoS) attack.