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RUSTSEC-2021-0083
No affected components available
Affected version of this crate, which is a required dependency in com-impl,
provides a faulty implementation of the IUnknown::QueryInterface method.
QueryInterface implementation must call IUnknown::AddRef before returning the pointer,
as describe in this documentation:
https://docs.microsoft.com/en-us/windows/win32/api/unknwn/nf-unknwn-iunknown-queryinterface(refiid_void)
As it is not incrementing the refcount as expected, the following calls to IUnknown::Release method
will cause WMI to drop reference to the interface, and can lead to invalid reference.
This is documented in https://docs.microsoft.com/en-us/windows/win32/learnwin32/managing-the-lifetime-of-an-object#reference-counting
There is no simple workaround, as you can't know how many time QueryInterface will be called. The only way to quick fix this is to use the macro expanded version of the code and modify the QueryInterface method to add the AddRef call yourself.
The issue was corrected in commit 9803f31fbd1717d482d848f041044d061fca6da7.
Measures severity based on intrinsic characteristics of the vulnerability, independent of environment.
No exploitation activity has been observed at this time. Continue routine monitoring.
Probability that this vulnerability will be exploited in the wild within the next 30 days.
We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.
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