CVE-2020-15254
Crossbeam is a set of tools for concurrent programming.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (2.78%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
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.
- CVSS 3.1
- 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 2.78% probability · 86th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-119, CWE-401
- Affected
- crossbeam project/crossbeam
- Source
- security-advisories@github.com
References
- https://github.com/RustSec/advisory-db/pull/425Patch, Third Party Advisory
- https://github.com/crossbeam-rs/crossbeam/issues/539Exploit, Third Party Advisory
- https://github.com/crossbeam-rs/crossbeam/pull/533Exploit, Patch, Third Party Advisory
- https://github.com/crossbeam-rs/crossbeam/security/advisories/GHSA-v5m7-53cv-f3hxThird Party Advisory
- https://github.com/RustSec/advisory-db/pull/425Patch, Third Party Advisory
- https://github.com/crossbeam-rs/crossbeam/issues/539Exploit, Third Party Advisory
- https://github.com/crossbeam-rs/crossbeam/pull/533Exploit, Patch, Third Party Advisory
- https://github.com/crossbeam-rs/crossbeam/security/advisories/GHSA-v5m7-53cv-f3hxThird Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.