Textimage module for Drupal Captcha security bypass

textimage-captcha-security-bypass (31984) The risk level is classified as LowLow Risk

Description:

Textimage module for Drupal could allow a remote attacker to bypass security restrictions, caused by improper validation when using captcha. A remote attacker could send a specially-crafted HTTP POST request to bypass captcha security restrictions and perform automated data posting.

*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:

Bypass Security

Remedy:

Refer to DRUPAL-SA-2007-007, for patch, upgrade, or suggested workaround information. See References.

References:

  • DRUPAL-SA-2007-007: Textimage - response validation bypass.
  • Textimage Web site: Textimage | Drupal.org.
  • BID-22329: Drupal CAPTCHA And TEXTIMAGE Bypass Weakness
  • CVE-2007-0658: The (1) Textimage 4.7.x before 4.7-1.2 and 5.x before 5.x-1.1 module for Drupal and the (2) Captcha 4.7.x before 4.7-1.2 and 5.x before 5.x-1.1 module for Drupal allow remote attackers to bypass the CAPTCHA test via an empty captcha element in $_SESSION.
  • OSVDB ID: 32137: Drupal Captcha Module $_SESSION Manipulation CAPTCHA Bypass
  • OSVDB ID: 32138: Drupal Textimage Module $_SESSION Manipulation CAPTCHA Bypass
  • SA23983: Drupal Captcha Module Security Bypass
  • SA23985: Drupal Textimage Module Security Bypass

Platforms Affected:

  • Drupal Textimage 4.7.x
  • Drupal Textimage 5.x

Reported:

Jan 31, 2007

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 the author/distributor (IBM Internet Security Systems X-Force) 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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* According to the Forum of Incident Response and Security Teams (FIRST), the Common Vulnerability Scoring System (CVSS) is an "industry open standard designed to convey vulnerability severity and help to determine urgency and priority of response." IBM PROVIDES THE CVSS SCORES "AS IS" WITHOUT WARRANTY OF ANY KIND, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. CUSTOMERS ARE RESPONSIBLE FOR ASSESSING THE IMPACT OF ANY ACTUAL OR POTENTIAL SECURITY VULNERABILITY.
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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IBM Security Systems include an extensive portfolio of hardware, software solutions, professional and managed services offerings covering the spectrum of IT and business security risks: people and identity, data and information, application and process, network, server and endpoint and physical infrastructure, empowering clients to innovate and operate their businesses on the most secure infrastructure platforms. Through world-class solutions that address risk across the enterprise, IBM helps organizations build a strong security posture that helps reduce costs, improve service, and manage risk. IBM X-Force(R) Research and Development is one of the most renowned commercial security research and development groups in the world. For more information on how to address today's biggest risks, please visit us at ibm.com/security.