Weak validation of Amazon SNS push messages in W3 Total Cache WordPress Plugin

[Summer of Pwnage <lists () securify nl>]

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Weak validation of Amazon SNS push messages in W3 Total Cache WordPress
Plugin
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Sipke Mellema, July 2016

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Abstract
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A vulnerability in the validation of Amazon SNS messages was found in
the W3 Total Cache plugin. This issue allows an attacker to perform a
variety of actions concerning the server's cache, which may result in a
Denial of Service attack.

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OVE ID
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OVE-20160724-0012

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Tested versions
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This issue was successfully tested on the W3 Total Cache WordPress
Plugin version 0.9.4.1.

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Fix
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This issue is resolved in W3 Total Cache version 0.9.5.

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Details
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https://sumofpwn.nl/advisory/2016/weak_validation_of_amazon_sns_push_messages_in_w3_total_cache_wordpress_plugin.html

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Summer of Pwnage (https://sumofpwn.nl) is a Dutch community project. Its
goal is to contribute to the security of popular, widely used OSS
projects in a fun and educational way.

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