Ubuntu 18.04 LTS / 20.04 LTS / 20.10 : Firefox vulnerabilities (USN-4599-1)

critical Nessus Plugin ID 141863
New! Plugin Severity Now Using CVSS v3

The calculated severity for Plugins has been updated to use CVSS v3 by default. Plugins that do not have a CVSS v3 score will fall back to CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.

Synopsis

The remote Ubuntu host is missing one or more security updates.

Description

The remote Ubuntu 18.04 LTS / 20.04 LTS / 20.10 host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-4599-1 advisory.

- 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. (CVE-2020-15254)

- If a valid external protocol handler was referenced in an image tag, the resulting broken image size could be distinguished from a broken image size of a non-existent protocol handler. This allowed an attacker to successfully probe whether an external protocol handler was registered. This vulnerability affects Firefox < 82. (CVE-2020-15680)

- When multiple WASM threads had a reference to a module, and were looking up exported functions, one WASM thread could have overwritten another's entry in a shared stub table, resulting in a potentially exploitable crash. This vulnerability affects Firefox < 82. (CVE-2020-15681)

- When a link to an external protocol was clicked, a prompt was presented that allowed the user to choose what application to open it in. An attacker could induce that prompt to be associated with an origin they didn't control, resulting in a spoofing attack. This was fixed by changing external protocol prompts to be tab-modal while also ensuring they could not be incorrectly associated with a different origin. This vulnerability affects Firefox < 82. (CVE-2020-15682)

- Mozilla developers and community members reported memory safety bugs present in Firefox 81 and Firefox ESR 78.3. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox ESR < 78.4, Firefox < 82, and Thunderbird < 78.4. (CVE-2020-15683)

- Mozilla developers reported memory safety bugs present in Firefox 81. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox < 82. (CVE-2020-15684)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Update the affected packages.

See Also

https://ubuntu.com/security/notices/USN-4599-1

Plugin Details

Severity: Critical

ID: 141863

File Name: ubuntu_USN-4599-1.nasl

Version: 1.3

Type: local

Agent: unix

Published: 10/24/2020

Updated: 11/24/2020

Dependencies: ssh_get_info.nasl

Risk Information

CVSS Score Source: CVE-2020-15684

VPR

Risk Factor: High

Score: 7.4

CVSS v2

Risk Factor: High

Base Score: 7.5

Temporal Score: 5.5

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

Temporal Vector: E:U/RL:OF/RC:C

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:canonical:ubuntu_linux:18.04:-:lts, cpe:/o:canonical:ubuntu_linux:20.04:-:lts, cpe:/o:canonical:ubuntu_linux:20.10, p-cpe:/a:canonical:ubuntu_linux:firefox, p-cpe:/a:canonical:ubuntu_linux:firefox-dev, p-cpe:/a:canonical:ubuntu_linux:firefox-geckodriver, p-cpe:/a:canonical:ubuntu_linux:firefox-locale-af, p-cpe:/a:canonical:ubuntu_linux:firefox-locale-an, p-cpe:/a:canonical:ubuntu_linux:firefox-locale-ar, p-cpe:/a:canonical:ubuntu_linux:firefox-locale-as, p-cpe:/a:canonical:ubuntu_linux:firefox-locale-ast, p-cpe:/a:canonical:ubuntu_linux:firefox-locale-az, p-cpe:/a:canonical:ubuntu_linux:firefox-locale-be, p-cpe:/a:canonical:ubuntu_linux:firefox-locale-bg, p-cpe:/a:canonical:ubuntu_linux:firefox-locale-bn, p-cpe:/a:canonical:ubuntu_linux:firefox-locale-br, p-cpe:/a:canonical:ubuntu_linux:firefox-locale-bs, p-cpe:/a:canonical:ubuntu_linux:firefox-locale-ca, p-cpe:/a:canonical:ubuntu_linux:firefox-locale-cak, p-cpe:/a:canonical:ubuntu_linux:firefox-locale-cs, p-cpe:/a:canonical:ubuntu_linux:firefox-locale-csb, p-cpe:/a:canonical:ubuntu_linux:firefox-locale-cy, p-cpe:/a:canonical:ubuntu_linux:firefox-locale-da, p-cpe:/a:canonical:ubuntu_linux:firefox-locale-de, p-cpe:/a:canonical:ubuntu_linux:firefox-locale-el, p-cpe:/a:canonical:ubuntu_linux:firefox-locale-en, p-cpe:/a:canonical:ubuntu_linux:firefox-locale-eo, p-cpe:/a:canonical:ubuntu_linux:firefox-locale-es, p-cpe:/a:canonical:ubuntu_linux:firefox-locale-et, p-cpe:/a:canonical:ubuntu_linux:firefox-locale-eu, p-cpe:/a:canonical:ubuntu_linux:firefox-locale-fa, p-cpe:/a:canonical:ubuntu_linux:firefox-locale-fi, p-cpe:/a:canonical:ubuntu_linux:firefox-locale-fr, p-cpe:/a:canonical:ubuntu_linux:firefox-locale-fy, p-cpe:/a:canonical:ubuntu_linux:firefox-locale-ga, p-cpe:/a:canonical:ubuntu_linux:firefox-locale-gd, p-cpe:/a:canonical:ubuntu_linux:firefox-locale-gl, p-cpe:/a:canonical:ubuntu_linux:firefox-locale-gn, p-cpe:/a:canonical:ubuntu_linux:firefox-locale-gu, p-cpe:/a:canonical:ubuntu_linux:firefox-locale-he, p-cpe:/a:canonical:ubuntu_linux:firefox-locale-hi, p-cpe:/a:canonical:ubuntu_linux:firefox-locale-hr, p-cpe:/a:canonical:ubuntu_linux:firefox-locale-hsb, p-cpe:/a:canonical:ubuntu_linux:firefox-locale-hu, p-cpe:/a:canonical:ubuntu_linux:firefox-locale-hy, p-cpe:/a:canonical:ubuntu_linux:firefox-locale-ia, p-cpe:/a:canonical:ubuntu_linux:firefox-locale-id, p-cpe:/a:canonical:ubuntu_linux:firefox-locale-is, p-cpe:/a:canonical:ubuntu_linux:firefox-locale-it, p-cpe:/a:canonical:ubuntu_linux:firefox-locale-ja, p-cpe:/a:canonical:ubuntu_linux:firefox-locale-ka, p-cpe:/a:canonical:ubuntu_linux:firefox-locale-kab, p-cpe:/a:canonical:ubuntu_linux:firefox-locale-kk, p-cpe:/a:canonical:ubuntu_linux:firefox-locale-km, p-cpe:/a:canonical:ubuntu_linux:firefox-locale-kn, p-cpe:/a:canonical:ubuntu_linux:firefox-locale-ko, p-cpe:/a:canonical:ubuntu_linux:firefox-locale-ku, p-cpe:/a:canonical:ubuntu_linux:firefox-locale-lg, p-cpe:/a:canonical:ubuntu_linux:firefox-locale-lt, p-cpe:/a:canonical:ubuntu_linux:firefox-locale-lv, p-cpe:/a:canonical:ubuntu_linux:firefox-locale-mai, p-cpe:/a:canonical:ubuntu_linux:firefox-locale-mk, p-cpe:/a:canonical:ubuntu_linux:firefox-locale-ml, p-cpe:/a:canonical:ubuntu_linux:firefox-locale-mn, p-cpe:/a:canonical:ubuntu_linux:firefox-locale-mr, p-cpe:/a:canonical:ubuntu_linux:firefox-locale-ms, p-cpe:/a:canonical:ubuntu_linux:firefox-locale-my, p-cpe:/a:canonical:ubuntu_linux:firefox-locale-nb, p-cpe:/a:canonical:ubuntu_linux:firefox-locale-ne, p-cpe:/a:canonical:ubuntu_linux:firefox-locale-nl, p-cpe:/a:canonical:ubuntu_linux:firefox-locale-nn, p-cpe:/a:canonical:ubuntu_linux:firefox-locale-nso, p-cpe:/a:canonical:ubuntu_linux:firefox-locale-oc, p-cpe:/a:canonical:ubuntu_linux:firefox-locale-or, p-cpe:/a:canonical:ubuntu_linux:firefox-locale-pa, p-cpe:/a:canonical:ubuntu_linux:firefox-locale-pl, p-cpe:/a:canonical:ubuntu_linux:firefox-locale-pt, p-cpe:/a:canonical:ubuntu_linux:firefox-locale-ro, p-cpe:/a:canonical:ubuntu_linux:firefox-locale-ru, p-cpe:/a:canonical:ubuntu_linux:firefox-locale-si, p-cpe:/a:canonical:ubuntu_linux:firefox-locale-sk, p-cpe:/a:canonical:ubuntu_linux:firefox-locale-sl, p-cpe:/a:canonical:ubuntu_linux:firefox-locale-sq, p-cpe:/a:canonical:ubuntu_linux:firefox-locale-sr, p-cpe:/a:canonical:ubuntu_linux:firefox-locale-sv, p-cpe:/a:canonical:ubuntu_linux:firefox-locale-sw, p-cpe:/a:canonical:ubuntu_linux:firefox-locale-ta, p-cpe:/a:canonical:ubuntu_linux:firefox-locale-te, p-cpe:/a:canonical:ubuntu_linux:firefox-locale-th, p-cpe:/a:canonical:ubuntu_linux:firefox-locale-tr, p-cpe:/a:canonical:ubuntu_linux:firefox-locale-uk, p-cpe:/a:canonical:ubuntu_linux:firefox-locale-ur, p-cpe:/a:canonical:ubuntu_linux:firefox-locale-uz, p-cpe:/a:canonical:ubuntu_linux:firefox-locale-vi, p-cpe:/a:canonical:ubuntu_linux:firefox-locale-xh, p-cpe:/a:canonical:ubuntu_linux:firefox-locale-zh-hans, p-cpe:/a:canonical:ubuntu_linux:firefox-locale-zh-hant, p-cpe:/a:canonical:ubuntu_linux:firefox-locale-zu, p-cpe:/a:canonical:ubuntu_linux:firefox-mozsymbols

Required KB Items: Host/cpu, Host/Ubuntu, Host/Ubuntu/release, Host/Debian/dpkg-l

Exploit Ease: No known exploits are available

Patch Publication Date: 10/23/2020

Vulnerability Publication Date: 10/6/2020

Reference Information

CVE: CVE-2020-15254, CVE-2020-15680, CVE-2020-15681, CVE-2020-15682, CVE-2020-15683, CVE-2020-15684, CVE-2020-15969

USN: 4599-1