Core Security Technologies - CoreLabs Advisory
                  http://corelabs.coresecurity.com/

          Multiple vulnerabilities in BugTracker.Net


1. *Advisory Information*

Title: Multiple vulnerabilities in BugTracker.Net
Advisory Id: CORE-2010-1109
Advisory URL:
[http://www.coresecurity.com/content/multiple-vulnerabilities-in-bugtracker]
Date published: 2010-11-30
Date of last update: 2010-11-30
Vendors contacted: BugTracker.NET team
Release mode: Coordinated release


2. *Vulnerability Information*

Class: Cross site scripting [CWE-79], SQL injection [CWE-89]
Impact: Code execution
Remotely Exploitable: Yes
Locally Exploitable: No
CVE Name: CVE-2010-3266, CVE-2010-3267
Bugtraq ID: N/A


3. *Vulnerability Description*

BugTracker.NET [1][2] is an open-source web-based bug tracker written
using ASP.NET, C#, and Microsoft SQL Server. Several cross-site
scripting and SQL-injection vulnerabilities were found in the following
files of the BugTracker.NET:

   . *bugs.aspx*. SQL injection in line 141.
   . *delete_query.aspx*. No sanitization for 'row_id.Value' in line 30.
   . *edit_bug.aspx*. Variables without sanitization in lines 1846 and 1857.
   . *edit_bug.aspx*. No sanitization for variable 'new_project', line 2214.
   . *edit_bug.aspx*. XSS in line 2918.
   . *edit_comment.aspx*. XSS in line 233.
   . *edit_customfield.aspx*. Lines 165 and 172, no sanitization.
   . *edit_user_permissions2.aspx*. XSS in line 40.
   . *massedit.aspx*. SQL Injection in line 162.


4. *Vulnerable packages*

   . BugTracker.NET v3.4.4.
   . Older versions are probably affected too, but they were not checked.


5. *Non-vulnerable packages*

   . BugTracker.NET v3.4.5.


6. *Credits*

This vulnerability was discovered and researched by Damián Saura
[http://corelabs.coresecurity.com/index.php?module=Wiki&action=view&type=researcher&name=Damian_Saura]
and Alejandro Frydman from Core Security Technologies.


7. *Technical Description / Proof of Concept Code*

7.1. *XSS Vulnerabilities*

[CVE-2010-3266 | N/A]. All XSS vulnerabilities can be exploited in
similar ways. The following proof of concept shows how to exploit the
XSS founded in 'edit_comment.aspx':

/-----
...   
230 <div class=align>
231 <table border=0><tr><td>
232
233 <a href=edit_bug.aspx?id=<%
Response.Write(Request["bug_id"]);%>>back to <%
Response.Write(btnet.Util.get_setting("SingularBugLabel","bug")); %></a>
234 <form class=frm runat="server">
235
236    <table border=0>
...
-----/
 First, login to BugTracker and create a comment in a previously created
bug. Then, edit it using this URL:

/-----
http://localhost:4535/edit_comment.aspx?id=48&bug_id=3%3E%3Cscript%3Ealert%28%27%27%29;%3C/script%3E
-----/
 As a result, the JavaScript code injected into the parameter 'bug_id'
will be rendered without sanitization in the line 233, and executed in
the context of the client's web browser.


7.2. *SQL Injection Vulnerabilities*

[CVE-2010-3267 | N/A]. All SQL injection vulnerabilities can also be
exploited in similar ways. Consider, for example, the code located in
'delete_query.aspx':

/-----
...
26 if (IsPostBack)
27 {
28     // do delete here
29     sql = @"delete queries where qu_id = $1";
30     sql = sql.Replace("$1", row_id.Value);
31     btnet.DbUtil.execute_nonquery(sql);
32     Server.Transfer ("queries.aspx");
33 }
...
-----/
 In line 30, the value of 'row_id' is injected without sanitization into
the SQL query. This value arrives to the server in a hidden field of a
client request. As a result, a malicious user can manipulate this value
in order to execute code in the database layer of the application.


8. *Report Timeline*

. 2010-11-29:
Core Security Technologies notifies the BugTracker team of the
vulnerability, setting the estimated publication date of the advisory to
December 20th 2010.

. 2010-11-29:
The BugTracker team asks Core for a technical description of the
vulnerability.

. 2010-11-29:
Technical details sent to BugTracker team.

. 2010-11-29:
The BugTracker team acknowledges the report and notifies they will fix
all issues in 1 or 2 working days.

. 2010-11-30:
The BugTracker team notifies that a patched version is publicly
available at Sourceforge and Codeplex.

. 2010-11-30:
The advisory CORE-2010-1109 is published.


9. *References*

[1] BugTracker.NET official website:
[http://ifdefined.com/bugtrackernet.html].
[2] BugTracker.NET Source Forge project:
[http://sourceforge.net/projects/btnet/].


10. *About CoreLabs*

CoreLabs, the research center of Core Security Technologies, is charged
with anticipating the future needs and requirements for information
security technologies. We conduct our research in several important
areas of computer security including system vulnerabilities, cyber
attack planning and simulation, source code auditing, and cryptography.
Our results include problem formalization, identification of
vulnerabilities, novel solutions and prototypes for new technologies.
CoreLabs regularly publishes security advisories, technical papers,
project information and shared software tools for public use at:
[http://corelabs.coresecurity.com].


11. *About Core Security Technologies*

Core Security Technologies develops strategic solutions that help
security-conscious organizations worldwide develop and maintain a
proactive process for securing their networks. The company's flagship
product, CORE IMPACT, is the most comprehensive product for performing
enterprise security assurance testing. CORE IMPACT evaluates network,
endpoint and end-user vulnerabilities and identifies what resources are
exposed. It enables organizations to determine if current security
investments are detecting and preventing attacks. Core Security
Technologies augments its leading technology solution with world-class
security consulting services, including penetration testing and software
security auditing. Based in Boston, MA and Buenos Aires, Argentina, Core
Security Technologies can be reached at 617-399-6980 or on the Web at
[http://www.coresecurity.com].


12. *Disclaimer*

The contents of this advisory are copyright (c) 2010 Core Security
Technologies and (c) 2010 CoreLabs, and are licensed under a Creative
Commons Attribution Non-Commercial Share-Alike 3.0 (United States)
License: [http://creativecommons.org/licenses/by-nc-sa/3.0/us/]


13. *PGP/GPG Keys*

This advisory has been signed with the GPG key of Core Security
Technologies advisories team, which is available for download at
[http://www.coresecurity.com/files/attachments/core_security_advisories.asc].