Information disclosure in Firefox ESR and Mozilla Firefox - CVE-2020-15652

Vulnerability identifier: #VU32897

CSH Severity: Medium

CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green

CVE-ID: CVE-2020-15652

CWE-ID: CWE-200

Exploitation vector: Remote access

Exploit availability: No public exploit available

Affected software:
Firefox ESR
Mozilla Firefox
Gentoo Linux
Debian Linux
Red Hat Enterprise Linux for Power, big endian
Red Hat Enterprise Linux Workstation
Red Hat Enterprise Linux Desktop
CentOS
Red Hat Enterprise Linux Server
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for Scientific Computing
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for ARM 64
Red Hat Enterprise Linux for x86_64
Red Hat Enterprise Linux for Power, little endian - Extended Update Support
Red Hat Enterprise Linux for x86_64 - Extended Update Support
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support
Red Hat Enterprise Linux for ARM 64 - Extended Update Support
Red Hat Enterprise Linux Server - TUS
Red Hat Enterprise Linux Server - AUS
Slackware Linux
Opensuse
Ubuntu
Red Hat Enterprise Linux Server for x86_64 - Update Services for SAP Solutions
Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions
firefox (Red Hat package)
firefox-esr (Alpine package)
mozjs68 (Alpine package)
firefox (Alpine package)
firefox-esr (Debian package)
thunderbird (Red Hat package)
thunderbird (Debian package)
firefox (Ubuntu package)
Mozilla Thunderbird

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to excessive data output in stack trace for JavaScript errors. A remote attacker can obtain result of a cross-origin redirect.

Install updates from vendor's website.

• https://www.mozilla.org/en-US/security/advisories/mfsa2020-30/
• https://www.mozilla.org/en-US/security/advisories/mfsa2020-31/
• https://www.mozilla.org/en-US/security/advisories/mfsa2020-32/