rustsec-2023-0005
Vulnerability from osv_rustsec
Published
2023-01-11 12:00
Modified
2023-06-13 13:10
Summary
`tokio::io::ReadHalf<T>::unsplit` is Unsound
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.
{
"affected": [
{
"database_specific": {
"categories": [
"memory-exposure"
],
"cvss": null,
"informational": "unsound"
},
"ecosystem_specific": {
"affected_functions": null,
"affects": {
"arch": [],
"functions": [],
"os": []
}
},
"package": {
"ecosystem": "crates.io",
"name": "tokio",
"purl": "pkg:cargo/tokio"
},
"ranges": [
{
"events": [
{
"introduced": "0.2.0"
},
{
"fixed": "1.18.5"
},
{
"introduced": "1.19.0"
},
{
"fixed": "1.20.4"
},
{
"introduced": "1.21.0"
},
{
"fixed": "1.24.2"
}
],
"type": "SEMVER"
}
],
"versions": []
}
],
"aliases": [
"GHSA-4q83-7cq4-p6wg"
],
"database_specific": {
"license": "CC0-1.0"
},
"details": "`tokio::io::ReadHalf\u003cT\u003e::unsplit` can violate the `Pin` contract\n\nThe soundness issue is described in the [tokio/issues#5372](https://github.com/tokio-rs/tokio/issues/5372)\n\nSpecific set of conditions needed to trigger an issue (a !Unpin type in ReadHalf)\nis unusual, combined with the difficulty of making any arbitrary use-after-free\nexploitable in Rust without doing a lot of careful alignment of data types in\nthe surrounding code.\n\nThe `tokio` feature `io-util` is also required to be enabled to trigger this\nsoundness issue.\n\nThanks to zachs18 reporting the issue to Tokio team responsibly and taiki-e\nand carllerche appropriately responding and fixing the soundness bug.\n\nTokio before 0.2.0 used `futures` 0.1 that did not have `Pin`, so it is not\naffected by this issue.",
"id": "RUSTSEC-2023-0005",
"modified": "2023-06-13T13:10:24Z",
"published": "2023-01-11T12:00:00Z",
"references": [
{
"type": "PACKAGE",
"url": "https://crates.io/crates/tokio"
},
{
"type": "ADVISORY",
"url": "https://rustsec.org/advisories/RUSTSEC-2023-0005.html"
},
{
"type": "REPORT",
"url": "https://github.com/tokio-rs/tokio/issues/5372"
}
],
"related": [],
"severity": [],
"summary": "`tokio::io::ReadHalf\u003cT\u003e::unsplit` is Unsound"
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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