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advisory-db/crates/unicycle/RUSTSEC-2020-0116.md
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[advisory]
id = "RUSTSEC-2020-0116"
package = "unicycle"
date = "2020-11-15"
url = "https://github.com/udoprog/unicycle/issues/8"
categories = ["memory-corruption", "thread-safety"]
aliases = ["CVE-2020-36436"]
cvss = "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H"

[versions]
patched = [">= 0.7.1"]

PinSlab and Unordered<T, S> need bounds on their Send/Sync traits

Affected versions of this crate unconditionally implemented Send & Sync for types PinSlab<T> & Unordered<T, S>. This allows sending non-Send types to other threads and concurrently accessing non-Sync types from multiple threads.

This can result in a data race & memory corruption when types that provide internal mutability without synchronization are contained within PinSlab<T> or Unordered<T, S> and accessed concurrently from multiple threads.

The flaw was corrected in commits 92f40b4 & 6a6c367 by adding trait bound T: Send to Send impls for PinSlab<T> & Unordered<T, S> and adding T: Sync to Sync impls for PinSlab<T> & Unordered<T, S>.