CVE Vulnerabilities

CVE-2020-6821

Use of Uninitialized Resource

Published: Apr 24, 2020 | Modified: Jul 21, 2021
CVSS 3.x
7.5
HIGH
Source:
NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CVSS 2.x
5 MEDIUM
AV:N/AC:L/Au:N/C:P/I:N/A:N
RedHat/V2
RedHat/V3
7.5 IMPORTANT
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Ubuntu
MEDIUM

When reading from areas partially or fully outside the source resource with WebGLs copyTexSubImage method, the specification requires the returned values be zero. Previously, this memory was uninitialized, leading to potentially sensitive data disclosure. This vulnerability affects Thunderbird < 68.7.0, Firefox ESR < 68.7, and Firefox < 75.

Weakness

The product uses or accesses a resource that has not been initialized.

Affected Software

Name Vendor Start Version End Version
Firefox Mozilla * 75.0 (excluding)
Firefox_esr Mozilla * 68.7.0 (excluding)
Thunderbird Mozilla * 68.7.0 (excluding)
Red Hat Enterprise Linux 6 RedHat firefox-0:68.7.0-2.el6_10 *
Red Hat Enterprise Linux 6 RedHat thunderbird-0:68.7.0-1.el6_10 *
Red Hat Enterprise Linux 7 RedHat firefox-0:68.7.0-2.el7_8 *
Red Hat Enterprise Linux 7 RedHat thunderbird-0:68.7.0-1.el7_8 *
Red Hat Enterprise Linux 8 RedHat firefox-0:68.7.0-2.el8_1 *
Red Hat Enterprise Linux 8 RedHat thunderbird-0:68.7.0-1.el8_1 *
Red Hat Enterprise Linux 8.0 Update Services for SAP Solutions RedHat firefox-0:68.7.0-2.el8_0 *
Red Hat Enterprise Linux 8.0 Update Services for SAP Solutions RedHat thunderbird-0:68.7.0-1.el8_0 *
Firefox Ubuntu bionic *
Firefox Ubuntu devel *
Firefox Ubuntu eoan *
Firefox Ubuntu focal *
Firefox Ubuntu groovy *
Firefox Ubuntu hirsute *
Firefox Ubuntu impish *
Firefox Ubuntu jammy *
Firefox Ubuntu kinetic *
Firefox Ubuntu lunar *
Firefox Ubuntu mantic *
Firefox Ubuntu noble *
Firefox Ubuntu trusty *
Firefox Ubuntu upstream *
Firefox Ubuntu xenial *
Mozjs38 Ubuntu bionic *
Mozjs38 Ubuntu esm-apps/bionic *
Mozjs38 Ubuntu upstream *
Mozjs52 Ubuntu bionic *
Mozjs52 Ubuntu eoan *
Mozjs52 Ubuntu esm-apps/focal *
Mozjs52 Ubuntu esm-infra/bionic *
Mozjs52 Ubuntu focal *
Mozjs52 Ubuntu groovy *
Mozjs52 Ubuntu upstream *
Mozjs60 Ubuntu eoan *
Mozjs60 Ubuntu upstream *
Mozjs68 Ubuntu focal *
Mozjs68 Ubuntu groovy *
Mozjs68 Ubuntu upstream *
Thunderbird Ubuntu bionic *
Thunderbird Ubuntu devel *
Thunderbird Ubuntu eoan *
Thunderbird Ubuntu focal *
Thunderbird Ubuntu groovy *
Thunderbird Ubuntu hirsute *
Thunderbird Ubuntu impish *
Thunderbird Ubuntu jammy *
Thunderbird Ubuntu kinetic *
Thunderbird Ubuntu lunar *
Thunderbird Ubuntu mantic *
Thunderbird Ubuntu noble *
Thunderbird Ubuntu trusty *
Thunderbird Ubuntu upstream *
Thunderbird Ubuntu xenial *

Potential Mitigations

References