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Improper Authentication in Burden

Advisory ID:HTB23192
Vendor:Josh Fradley
Vulnerable Versions:1.8 and probably prior
Tested Version:1.8
Advisory Publication:December 18, 2013 [without technical details]
Vendor Notification:December 18, 2013
Vendor Fix:December 18, 2013
Public Disclosure:January 8, 2014
Latest Update:January 6, 2014
Vulnerability Type:Improper Authentication [CWE-287]
CVE Reference:CVE-2013-7137
Risk Level:High
CVSSv2 Base Score:7.5 (AV:N/AC:L/Au:N/C:P/I:P/A:P)
Solution Status:Fixed by Vendor
Discovered and Provided:High-Tech Bridge Security Research Lab

Advisory Details:

High-Tech Bridge Security Research Lab discovered vulnerability in application authentication mechanism in Burden, which can be exploited by remote non-authenticated attacker to gain administrative access to the vulnerable application.

1) Improper Authentication in Burden: CVE-2013-7137
The vulnerability exists due to insufficient authentication when handling "burden_user_rememberme" cookie parameter. A remote unauthenticated user can set "burden_user_rememberme" cookie to "1" and gain administrative access to the application.
The exploitation example below shows HTTP GET request that grants administrative privileges to the user:
GET /login.php HTTP/1.1
Cookie: burden_user_rememberme=1;

The cookie can be also changed using a browser plugin such as Firebug for FireFox.

ImmuniWeb® On-Demand Web Application Penetration Test

Update to Burden 1.8.1

More Information:

[1] High-Tech Bridge Advisory HTB23192 - https://www.htbridge.com/advisory/HTB23192 - Improper Authentication in Burden.
[2] Burden - https://github.com/joshf - Burden is a full featured task management app written in PHP.
[3] Common Vulnerabilities and Exposures (CVE) - http://cve.mitre.org/ - international in scope and free for public use, CVE® is a dictionary of publicly known information security vulnerabilities and exposures.
[4] Common Weakness Enumeration (CWE) - http://cwe.mitre.org - targeted to developers and security practitioners, CWE is a formal list of software weakness types.
[5] ImmuniWeb® SaaS - hybrid of manual web application penetration test and cutting-edge vulnerability scanner available online via a Software-as-a-Service (SaaS) model.
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