Permissions, Privileges, and Access Controls in Firefox ESR and Mozilla Firefox - CVE-2020-12388
Published: May 5, 2020 / Updated: May 29, 2020
Vulnerability identifier: #VU27530
CSH Severity: High
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/U:Amber
CVE-ID: CVE-2020-12388
CWE-ID: CWE-264
Exploitation vector: Remote access
Exploit availability:
Public exploit is available
Affected software:
Firefox ESR
Mozilla Firefox
Slackware Linux
Opensuse
firefox (Alpine package)
firefox-esr (Alpine package)
mozjs68 (Alpine package)
Firefox ESR
Mozilla Firefox
Slackware Linux
Opensuse
firefox (Alpine package)
firefox-esr (Alpine package)
mozjs68 (Alpine package)
Detailed vulnerability description
The vulnerability allows a remote attacker to bypass sandbox restrictions.
The vulnerability exists due the Firefox content processes did not sufficiently lockdown access control due to improper protection of access tokens. A remote attacker can bypass implemented security restrictions and execute arbitrary code on the target system.
Note, this vulnerability affects Windows versions only.
How to mitigate CVE-2020-12388
Install updates from vendor's website.