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CVE-2020-15254

Status Candidate

Overview

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.

Related Files

Ubuntu Security Notice USN-4599-2
Posted Oct 27, 2020
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4599-2 - USN-4599-1 fixed vulnerabilities in Firefox. This update provides the corresponding updates for Ubuntu 16.04 LTS. Multiple security issues were discovered in Firefox. If a user were tricked in to opening a specially crafted website, an attacker could potentially exploit these to cause a denial of service, spoof the prompt for opening an external application, obtain sensitive information, or execute arbitrary code. Various other issues were also addressed.

tags | advisory, denial of service, arbitrary, spoof, vulnerability
systems | linux, ubuntu
advisories | CVE-2020-15254, CVE-2020-15683
SHA-256 | 0cb7b1c8febb53988764a40fd3798cde7e434f570858b4ba17b00096c4cf59af
Ubuntu Security Notice USN-4599-1
Posted Oct 23, 2020
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4599-1 - Multiple security issues were discovered in Firefox. If a user were tricked in to opening a specially crafted website, an attacker could potentially exploit these to cause a denial of service, spoof the prompt for opening an external application, obtain sensitive information, or execute arbitrary code.

tags | advisory, denial of service, arbitrary, spoof
systems | linux, ubuntu
advisories | CVE-2020-15254, CVE-2020-15683
SHA-256 | 92f166b6bed6ff50c6b8dfd658daac52698070ae91fda1ca0ccf131a7a8c0293
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