Uvdesk 1.1.1 - RCE via Insecure File Upload
Summary
| Name | Uvdesk 1.1.1 - RCE via Insecure File Upload |
| Code name | |
| Product | Uvdesk |
| Affected versions | Version 1.1.1 |
| State | Public |
| Release date | 2023-04-04 |
Vulnerability
| Kind | Insecure file upload |
| Rule | |
| Remote | Yes |
| CVSSv3.1 Vector | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H |
| CVSSv3.1 Base Score | 9.9 |
| Exploit available | Yes |
| CVE ID(s) |
Description
Uvdesk version 1.1.1 allows an authenticated remote attacker to execute commands on the server. This is possible because the application does not properly validate profile pictures uploaded by customers.
Vulnerability
This vulnerability occurs because the application does not properly validate profile pictures uploaded by customers.
Exploitation
The application only accepts images (validates content and mimetype), however it does not correctly validate the image extension. Thanks to this we can inject PHP code in the image comments (so as not to corrupt it), and then through a proxy we change the image extension to .php.
Evidence of exploitation
Our security policy
We have reserved the CVE-2023-0265 to refer to this issue from now on.
System Information
-
Version: Uvdesk 1.1.1
-
Operating System: GNU/Linux
Mitigation
There is currently no patch available for this vulnerability.
Credits
The vulnerability was discovered by Carlos Bello from Fluid Attacks' Offensive Team.
References
Vendor page https://github.com/uvdesk/community-skeleton
Timeline
2023-01-14
Vulnerability discovered.
2023-01-14
Vendor contacted.
2023-01-14
Vendor replied acknowledging the report.
2023-04-04
Public Disclosure.
