HistoryEdit

RUSTSEC-2020-0151

Generators can cause data races if non-Send types are used in their generator functions

Issued
Package
generator (crates.io)
Type
Vulnerability
Categories
Keywords
#concurrency
Aliases
Details
https://github.com/Xudong-Huang/generator-rs/issues/27
CVSS Score
5.9 MEDIUM
CVSS Details
Attack vector
Network
Attack complexity
High
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
CVSS Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Patched
  • >=0.7.0
Keywords
#concurrency

Description

The Generator type is an iterable which uses a generator function that yields values. In affected versions of the crate, the provided function yielding values had no Send bounds despite the Generator itself implementing Send.

The generator function lacking a Send bound means that types that are dangerous to send across threads such as Rc could be sent as part of a generator, potentially leading to data races.

This flaw was fixed in commit f7d120a3b by enforcing that the generator function be bound by Send.