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VPR Score: 6.7
Synopsis
The remote device is missing a vendor-supplied security patch.
Description
Use after free vulnerability was found in unserialize() function. We can create ZVAL and free it via Serializable::unserialize. However the unserialize() will still allow to use R: or r: to set references to that already freed memory. It is possible to use-after-free attack and execute arbitrary code remotely.
Solution
Upgrade to one of the non-vulnerable versions listed in the F5 Solution SOL17377.