Vulnerability Details CVE-2020-15254
Crossbeam is a set of tools for concurrent programming. In crossbeam-channel before version 0.4.4, 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. This has been fixed in crossbeam-channel 0.4.4.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.005
EPSS Ranking 65.4%
CVSS Severity
CVSS v3 Score 8.1
CVSS v2 Score 7.5
References
- https://github.com/RustSec/advisory-db/pull/425
- https://github.com/crossbeam-rs/crossbeam/issues/539
- https://github.com/crossbeam-rs/crossbeam/pull/533
- https://github.com/crossbeam-rs/crossbeam/security/advisories/GHSA-v5m7-53cv-f3hx
- https://github.com/RustSec/advisory-db/pull/425
- https://github.com/crossbeam-rs/crossbeam/issues/539
- https://github.com/crossbeam-rs/crossbeam/pull/533
- https://github.com/crossbeam-rs/crossbeam/security/advisories/GHSA-v5m7-53cv-f3hx
Products affected by CVE-2020-15254
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cpe:2.3:a:crossbeam_project:crossbeam:-
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cpe:2.3:a:crossbeam_project:crossbeam:0.1.0
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cpe:2.3:a:crossbeam_project:crossbeam:0.2.0
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cpe:2.3:a:crossbeam_project:crossbeam:0.3.0
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cpe:2.3:a:crossbeam_project:crossbeam:0.4.0
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cpe:2.3:a:crossbeam_project:crossbeam:0.4.1
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cpe:2.3:a:crossbeam_project:crossbeam:0.4.3