47082 : FormEncode chained_validators Filtering Steps Security Bypass
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Views This Week	Views All Time	Added to OSVDB	Last Modified	Modified (since 2008)	Percent Complete
1	237	over 3 years ago	over 2 years ago	5 times	70%

Timeline

Vendor Informed Date	Vendor Ack Date	Disclosure Date	Vendor Solution Date
2008-03-25	2008-03-25	2008-03-27	2008-03-27

Time to Patch
2 days

Description

FormEncode contains a flaw that may allow an attacker to bypass the filtering steps. The issue is due to the Schema.chained_validators not properly calling all validation routines when handling content. The schema only calls 'validate_partial' which may allow an attacker to bypass filtering restrictions.

Classification

Location: Remote / Network Access
Attack Type: Input Manipulation
Impact: Loss of Integrity
Solution: Upgrade
Exploit: Exploit Unknown
Disclosure: Vendor Verified

Technical

This vulnerability exists due to a regression error. The code worked properly in version 0.9 but was improperly modified or removed in version 1.0.

Solution

Upgrade to version 1.0.1 or higher, as it has been reported to fix this vulnerability. An upgrade is required as there are no known workarounds.

Products

Unknown or Incomplete

References

CVE ID: 2008-6547 (see also: NVD)
Secunia Advisory ID: 31081 31163
Vendor Specific News/Changelog Entry: http://sourceforge.net/tracker/download.php?group_id=91231&atid=596416&file_id=271779&aid=1925164
http://sourceforge.net/tracker/index.php?func=detail&aid=1925164&group_id=91231&atid=596416
http://sourceforge.net/tracker/index.php?func=detail&aid=1925164&group_id=91231&atid=596416
http://www.formencode.org/news.html#id1
Other Advisory URL: https://www.redhat.com/archives/fedora-package-announce/2008-July/msg00607.html

Credit

Petter Urkedal -

CVSSv2 Score

CVSSv2 Base Score = 7.5
Source: nvd.nist.gov | Generated: 2009-03-30 | Disagree?

Blogs

This product uses the Daylife API but is not endorsed or certified by Daylife.

This section lists the latest news and blogs found via the daylife API (and for older items, the technorati API), which mention or otherwise discuss this vulnerability.

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