CVE-2017-16653: Channel Accessible by Non-Endpoint (Man-in-the-Middle)

August 6, 2018 (updated October 2, 2019)

The current implementation of CSRF protection in Symfony (Version >=2) does not use different tokens for HTTP and HTTPS; therefore the token is subject to MITM attacks on HTTP and can then be used in an HTTPS context to do CSRF attacks.

References

symfony.com/cve-2017-16653

Code Behaviors & Features

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