Ecosyste.ms: Advisories

Security Advisories: MDE2OlNlY3VyaXR5QWR2aXNvcnlHSFNBLXY1bTctNTNjdi1mM2h4

crossbeam-channel Undefined Behavior before v0.4.4

Impact

The affected version of this crate's the bounded channel incorrectly assumes that Vec::from_iter has allocated capacity that same as the number of iterator elements. Vec::from_iter does not actually guarantee that and may allocate extra memory. The destructor of the bounded channel reconstructs Vec from the raw pointer based on the incorrect assumes described above. This is unsound and causing deallocation with the incorrect capacity when Vec::from_iter has allocated different sizes with the number of iterator elements.

Patches

This has been fixed in crossbeam-channel 0.4.4.

We recommend users to upgrade to 0.4.4.

References

See https://github.com/crossbeam-rs/crossbeam/pull/533, https://github.com/crossbeam-rs/crossbeam/issues/539, and https://github.com/RustSec/advisory-db/pull/425 for more details.

License

This advisory is in the public domain.

Permalink: https://github.com/advisories/GHSA-v5m7-53cv-f3hx
JSON: https://advisories.ecosyste.ms/api/v1/advisories/MDE2OlNlY3VyaXR5QWR2aXNvcnlHSFNBLXY1bTctNTNjdi1mM2h4
Source: GitHub Advisory Database
Origin: Unspecified
Severity: High
Classification: General
Published: over 2 years ago
Updated: 11 months 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-v5m7-53cv-f3hx, CVE-2020-15254
References:

• https://github.com/crossbeam-rs/crossbeam/security/advisories/GHSA-v5m7-53cv-f3hx
• https://nvd.nist.gov/vuln/detail/CVE-2020-15254
• https://github.com/crossbeam-rs/crossbeam/issues/539
• https://github.com/RustSec/advisory-db/pull/425
• https://github.com/crossbeam-rs/crossbeam/pull/533
• https://rustsec.org/advisories/RUSTSEC-2020-0052.html
• https://github.com/advisories/GHSA-v5m7-53cv-f3hx

Repository: https://github.com/crossbeam-rs/crossbeam
Blast Radius: 36.9

Affected Packages