A race condition was addressed with additional validation. This issue is fixed in Security Update 2021-005 Catalina. Mounting a maliciously crafted NFS network share may lead to arbitrary code execution with system privileges.
The product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently.
Link | Tags |
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https://support.apple.com/en-us/HT212805 | vendor advisory |