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Certain apps such as AIM installer passes an empty generic mapping (this can be understood with their generic masks set to 0) and our code tries to map the access right from an ACE with the mapping provided by AccessCheck. This can lead to a bug where we would not be able to decode the generic right from an ACE as we need a proper generic mapping in order to do so. A mask right that is not decoded it cannot be used to mask out the remaining rights, further resulting into a denied access right. What Windows does instead is they are mapping the ACE's rights in another place, presumably when setting security data to an object, and they are using the generic mapping passed by the kernel. What we can do for the time being is to temporarily grant access to the client, but only if they are an administrator. CORE-18576 |
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