GHSA-4q83-7cq4-p6wg

Source

https://github.com/advisories/GHSA-4q83-7cq4-p6wg

Import Source

https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2023/02/GHSA-4q83-7cq4-p6wg/GHSA-4q83-7cq4-p6wg.json

Aliases

RUSTSEC-2023-0005

Published

2023-02-04T00:30:37Z

Modified

2023-11-08T04:15:17.465753Z

Details

tokio::io::ReadHalf<T>::unsplit can violate the Pin contract

The soundness issue is described in the tokio/issues#5372

Specific set of conditions needed to trigger an issue (a !Unpin type in ReadHalf) is unusual, combined with the difficulty of making any arbitrary use-after-free exploitable in Rust without doing a lot of careful alignment of data types in the surrounding code.

The tokio feature io-util is also required to be enabled to trigger this soundness issue.

Thanks to zachs18 reporting the issue to Tokio team responsibly and taiki-e and carllerche appropriately responding and fixing the soundness bug.

Tokio before 0.2.0 used futures 0.1 that did not have Pin, so it is not affected by this issue.

References