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WS-2020-0236

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Date: May 3, 2020

Versions before 0.3.5 of the crate 'futures' used a UnsafeCell in thread-local storage to return a noop waker reference, assuming that the reference would never be returned from another thread. This resulted in a segmentation fault crash if Waker::wake_by_ref() was called on a waker returned from another thread due to it attempting to dereference a pointer that wasn’t accesible from the main thread.

Language: RUST

Severity Score

Severity Score

Weakness Type (CWE)

Access of Uninitialized Pointer

CWE-824

Top Fix

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CVSS v3.1

Base Score:
Attack Vector (AV): LOCAL
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): REQUIRED
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): HIGH

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