Critical severity · published Oct 16, 2020
CVE-2020-15254
Crossbeam is a set of tools for concurrent programming
9.8
CVSS
2.7%
EPSS
No
On KEV
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 vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)2.7% · higher than 86% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
CR
Crossbeam · Crossbeam Project
before 0.4.4 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-15254
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-15254
Patch
https://github.com/RustSec/advisory-db/pull/425
Exploit
https://github.com/crossbeam-rs/crossbeam/issues/539
Exploit
https://github.com/crossbeam-rs/crossbeam/pull/533
Third Party Advisory
https://github.com/crossbeam-rs/crossbeam/security/advisories/GHSA-v5m7-53cv-f3hx
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