Ecosyste.ms: Advisories

Security Advisories: GSA_kwCzR0hTQS1xYzg0LWdxZjQtOTkyNs0sbw

crossbeam-utils Race Condition vulnerability

Impact

The affected version of this crate incorrectly assumed that the alignment of {i,u}64 was always the same as Atomic{I,U}64.

However, the alignment of {i,u}64 on a 32-bit target can be smaller than Atomic{I,U}64.

This can cause the following problems:

• Unaligned memory accesses
• Data race

Crates using fetch_* methods with AtomicCell<{i,u}64> are affected by this issue.

32-bit targets without Atomic{I,U}64 and 64-bit targets are not affected by this issue.
32-bit targets with Atomic{I,U}64 and {i,u}64 have the same alignment are also not affected by this issue.

The following is a complete list of the builtin targets that may be affected. (last update: nightly-2022-02-11)

• armv7-apple-ios (tier 3)
• armv7s-apple-ios (tier 3)
• i386-apple-ios (tier 3)
• i586-unknown-linux-gnu
• i586-unknown-linux-musl
• i686-apple-darwin (tier 3)
• i686-linux-android
• i686-unknown-freebsd
• i686-unknown-haiku (tier 3)
• i686-unknown-linux-gnu
• i686-unknown-linux-musl
• i686-unknown-netbsd (tier 3)
• i686-unknown-openbsd (tier 3)
• i686-wrs-vxworks (tier 3)

(script to get list)

Patches

This has been fixed in crossbeam-utils 0.8.7.

Affected 0.8.x releases have been yanked.

References

https://github.com/crossbeam-rs/crossbeam/pull/781

License

This advisory is in the public domain.

Permalink: https://github.com/advisories/GHSA-qc84-gqf4-9926
JSON: https://advisories.ecosyste.ms/api/v1/advisories/GSA_kwCzR0hTQS1xYzg0LWdxZjQtOTkyNs0sbw
Source: GitHub Advisory Database
Origin: Unspecified
Severity: High
Classification: General
Published: about 2 years ago
Updated: over 1 year ago

CVSS Score: 8.1
CVSS vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Identifiers: GHSA-qc84-gqf4-9926, CVE-2022-23639
References:

• https://github.com/crossbeam-rs/crossbeam/security/advisories/GHSA-qc84-gqf4-9926
• https://nvd.nist.gov/vuln/detail/CVE-2022-23639
• https://github.com/crossbeam-rs/crossbeam/pull/781
• https://github.com/crossbeam-rs/crossbeam/releases/tag/crossbeam-utils-0.8.7
• https://rustsec.org/advisories/RUSTSEC-2022-0041.html
• https://github.com/advisories/GHSA-qc84-gqf4-9926

Repository: https://github.com/crossbeam-rs/crossbeam
Blast Radius: 38.1

Affected Packages