HTTP response splitting in Django

1) HTTP response splitting

EUVDB-ID: #VU52942

Risk: Medium

CVSSv4.0: 1.2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2021-32052

CWE-ID: CWE-113 - Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Response Splitting')

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform HTTP splitting attacks.

The vulnerability exists due to software does not correctly processes CRLF character sequences in URLValidator. A remote attacker can send specially crafted request containing CRLF sequence and make the application to send a split HTTP response.

Successful exploitation of the vulnerability may allow an attacker perform cache poisoning attack.

Note, the vulnerability affects Django installations on Python 3.9.5+.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Django: 2.0 - 3.2.1

CPE2.3

• cpe:2.3:a:django_software_foundation:django:2.2.21:*:*:*:*:*:*:*
• cpe:2.3:a:django_software_foundation:django:3.2.1:*:*:*:*:*:*:*

External links

https://www.djangoproject.com/weblog/2021/may/06/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.