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 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> ...[+ full code] 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[+ full code] 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 } ...[+ full code] 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.