Security restrictions bypass in pretix

1) Input validation error

EUVDB-ID: #VU83290

Risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-44464

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote user to bypass implemented security restrictions.

The vulnerability exists due to insufficient validation of images passed to the application. A remote user can create a specially crafted ".eps" file, rename it into a file with ".png" extension and upload the file to the application.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

pretix: 1.0.0 - 2023.9.0

CPE2.3

• cpe:2.3:a:pretix:pretix:2023.7.1:*:*:*:*:*:*:*
• cpe:2.3:a:pretix:pretix:2023.7.0:*:*:*:*:*:*:*
• cpe:2.3:a:pretix:pretix:2023.6.3:*:*:*:*:*:*:*

External links

http://github.com/pretix/pretix/tags
http://github.com/pretix/pretix/compare/v2023.7.1...v2023.7.2
http://pretix.eu/about/en/ticketing
http://github.com/pretix/pretix/commit/8583bfb7d97263e9e923ad5d7f123ca1cadc8f2e
http://pretix.eu/about/de/blog/20230912-release-2023-7-2/

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.