Simple Machines Forum (SMF) WAV CAPTCHA security bypass

smf-wav-security-bypass (34907)

Low Risk

Description:

Simple Machines Forum (SMF) could allow a remote attacker to bypass CAPTCHA security restrictions, caused by a vulnerability in the WAV file randomization. An attacker could exploit this vulnerability to perform brute force attacks and possibly bypass registration security restrictions.

*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:	2.8
Exploitability:	Unproven
Remediation Level:	Unavailable
Report Confidence:	Uncorroborated

Consequences:

Bypass Security

Remedy:

No remedy available as of June 1, 2013.

References:

• Full-Disclosure Mailing List, Mon Jun 18 2007 - 04:49:53 CDT: Simle machines forum CAPTCHA bypass and PHP injection.
• Simple Machines Forum Web site: Home of SMF: Free PHP and MySQL forum software.
• CVE-2007-3308: Simple Machines Forum (SMF) 1.1.2 uses a concatenation method with insufficient randomization when creating a WAV file CAPTCHA, which allows remote attackers to pass the CAPTCHA test via an automated brute-force attack.
• OSVDB ID: 40617: Simple Machines Forum (SMF) WAV File CAPTCHA Test Bypass
• OSVDB ID: 44981: Simple Machines Forum (SMF) Hamming Distances Remote Audio CAPTCHA Bypass
• SECTRACK ID: 1018260: Simple Machines Forum Bugs Let Remote Users Execute Arbitrary Code or Bypass the Sound-Based CAPTCHA Function

Platforms Affected:

• Simple Machines Simple Machines Forum 1.1.2 and prior

Reported:

Jun 18, 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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