Summaryinfo

A vulnerability was found in Google webapp2 2.5.1. It has been rated as problematic. The impacted element is an unknown function of the file webapp2_extract.security.hash_password. The manipulation leads to denial of service. Additionally, an exploit exists.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Google webapp2 2.5.1. This issue affects an unknown function of the file webapp2_extract.security.hash_password. The manipulation with an unknown input leads to a denial of service vulnerability. Using CWE to declare the problem leads to CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. Impacted is availability.

The weakness was released 12/16/2013 by Krzysztof Kotowicz as Breaking Google AppEngine webapp2 applications with a single hash as confirmed blog post (Blog). It is possible to read the advisory at blog.kotowicz.net. The vendor was not involved in the public release. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details as well as a public exploit are known.

After immediately, there has been an exploit disclosed. It is declared as functional.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at OSVDB (101654†). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Vendor

• Google

Name

• webapp2

Version

• 2.5.1

License

• free

Website

• Vendor: https://www.google.com/

CPE 2.3info

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CPE 2.2info

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