Fix deserialization of untrusted data weakness#119
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The unserialize filter has a weakness to arbitrary class usage which can be combined with user input to create unserialization gadgets which are used in RCE vulnerability chains. I've also chosen to deprecate these functions. I see no reason to continue having them when they have so many sharp edges. Applications relying on these features, can add their own filters. Thanks to Volker Dusch and the PHP Ecosystem security team for reporting this.
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The unserialize filter has a weakness to arbitrary class usage which can be combined with user input to create unserialization gadgets which are used in RCE vulnerability chains.
I've also chosen to deprecate these functions. I see no reason to continue having them when they have so many sharp edges. Applications relying on these features, can add their own filters.
Thanks to Volker Dusch and the PHP Ecosystem security team for reporting this.