CVE-2020-15254

critical
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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.

References

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

Details

Source: MITRE

Published: 2020-10-16

Updated: 2020-10-28

Type: CWE-119

Risk Information

CVSS v2

Base Score: 7.5

Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P

Impact Score: 6.4

Exploitability Score: 10

Severity: HIGH

CVSS v3

Base Score: 9.8

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Impact Score: 5.9

Exploitability Score: 3.9

Severity: CRITICAL

Vulnerable Software

Configuration 1

OR

cpe:2.3:a:crossbeam_project:crossbeam:*:*:*:*:*:*:*:*

Tenable Plugins

View all (4 total)

IDNameProductFamilySeverity
141923Ubuntu 16.04 LTS : Firefox vulnerabilities (USN-4599-2)NessusUbuntu Local Security Checks
critical
141863Ubuntu 18.04 LTS / 20.04 LTS / 20.10 : Firefox vulnerabilities (USN-4599-1)NessusUbuntu Local Security Checks
critical
141572Mozilla Firefox < 82.0NessusMacOS X Local Security Checks
critical
141571Mozilla Firefox < 82.0NessusWindows
critical