compose.php in SquirrelMail 1.4.22 calls unserialize for the $attachments value, which originates from an HTTP POST request. NOTE: the vendor disputes this because these two conditions for PHP object injection are not satisfied: existence of a PHP magic method (such as __wakeup or __destruct), and any attack-relevant classes must be declared before unserialize is called (or must be autoloaded).
The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.
Link | Tags |
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https://www.openwall.com/lists/oss-security/2020/06/20/1 | third party advisory mailing list |