WebCalendar noSet variable overwrite

webcalendar-noset-variable-overwrite (32832) The risk level is classified as MediumMedium Risk

Description:

WebCalendar could allow a remote attacker to overwrite variables, caused by improper validation of unspecified parameters prior to being used with the noSet variable set. A remote attacker could exploit this vulnerability to overwrite certain configuration variables, which could lead to remote PHP file include vulnerabilities on the affected system.

*CVSS:

Base Score: 3.5
  Access Vector: Remote
  Access Complexity: Low
  Authentication: Not Required
  Confidentiality Impact: None
  Integrity Impact: Partial
  Availability Impact: None
 
Temporal Score: 2.6
  Exploitability: Unproven
  Remediation Level: Official-Fix
  Report Confidence: Confirmed

Consequences:

Data Manipulation

Remedy:

Upgrade to the latest version of WebCalendar (1.0.5 or later), available from SourceForge.net: Files. See References.

For Debian Linux:
Refer to DSA-1267-1 for patch, upgrade, or suggested workaround information. See References.

References:

  • SourceForge.net: Files: WebCalendar - File Release Notes and Changelog - Release Name: 1.0.5.
  • BID-22834: WebCalendar Certain Variable Overwrite Vulnerability
  • CVE-2007-1343: includes/functions.php in Craig Knudsen WebCalendar before 1.0.5 does not protect the noSet variable from external modification, which allows remote attackers to set arbitrary global variables via a URL with modified values in the noSet parameter, which leads to resultant vulnerabilities that probably include remote file inclusion and other issues.
  • DSA-1267: webcalendar -- missing input sanitising
  • OSVDB ID: 33867: WebCalendar includes/functions.php noSet Variable Overwrite
  • SA24403: WebCalendar "noSet" Variable Overwrite Vulnerability
  • VUPEN/ADV-2007-0851: WebCalendar noSet Parameter Handling Arbitrary Variable Overwrite Vulnerability

Platforms Affected:

  • Debian Debian Linux 3.1
  • WebCalendar WebCalendar 1.0.4

Reported:

Mar 04, 2007

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The information within this database may change without notice. Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. In no event shall IBM be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.

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