Arbitrary account hijacking in Django

1) Input validation error

EUVDB-ID: #VU23667

Risk: High

CVSSv3.1: 8.2 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N/E:P/RL:O/RC:C]

CVE-ID: CVE-2019-19844

CWE-ID: CWE-20 - Improper input validation

Exploit availability: Yes

Description

The vulnerability allows a remote attacker to hijack another user account.

The vulnerability exists due to insufficient validation of user-supplied input when processing email addresses passed via the password reset form. A remote attacker with knowledge of a valid email address can use a specially crafted email that after Unicode transformation will be treated as the victim's email address and reset password for the victim's account to the attacker provided email address.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Django: 1.1 - 3.0

External links

http://www.djangoproject.com/weblog/2019/dec/18/security-releases/

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.