Rapid7 Vulnerability & Exploit Database

MFSA2020-45 Firefox: Security Vulnerabilities fixed in Firefox 82 (CVE-2020-15254)

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MFSA2020-45 Firefox: Security Vulnerabilities fixed in Firefox 82 (CVE-2020-15254)

Severity
8
CVSS
(AV:N/AC:L/Au:N/C:P/I:P/A:P)
Published
10/16/2020
Created
10/22/2020
Added
10/21/2020
Modified
10/30/2020

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.

Solution(s)

  • mozilla-firefox-upgrade-82_0

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