FormEncode chained_validators security bypass

formencode-chainedvalidators-sec-bypass (43878)

Medium Risk

Description:

FormEncode could allow a remote attacker to bypass security restrictions, caused by the failure to invoke the chained_validators validating class. A remote attacker could exploit this vulnerability to bypass the filtering process and gain unauthorized access to the application.

*CVSS:

Base Score:	7.5
Access Vector:	Network
Access Complexity:	Low
Authentication:	None
Confidentiality Impact:	Partial
Integrity Impact:	Partial
Availability Impact:	Partial
Temporal Score:	5.5
Exploitability:	Unproven
Remediation Level:	Official-Fix
Report Confidence:	Confirmed

Consequences:

Bypass Security

Remedy:

Upgrade to the latest version of FormEncode (1.0.1 or later), available from the FormEncode Web site. See References.

References:

• FormEncode Web site: 1.0.1.
• SourceForge.net: Detail: 1925164: chained_validators don't run in 1.0.
• BID-30282: FormEncode 'chained_validators' Class Security Bypass Vulnerability
• CVE-2008-6547: schema.py in FormEncode for Python (python-formencode) 1.0 does not apply the chained_validators feature, which allows attackers to bypass intended access restrictions via unknown vectors.
• SA31081: FormEncode "chained_validators" Security Bypass Vulnerability

Platforms Affected:

• FormEncode FormEncode 1.0

Reported:

Mar 25, 2008

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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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