Buffer overflow in Firefox ESR and Mozilla Firefox - CVE-2020-6831

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Main Vulnerability Database Vulnerabilities #VU27532

Buffer overflow in Firefox ESR and Mozilla Firefox - CVE-2020-6831

Published: May 5, 2020 / Updated: May 5, 2020


Vulnerability identifier: #VU27532
CSH Severity: High
CVSS v4: 8.6 [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]
CVE-ID: CVE-2020-6831
CWE-ID: CWE-119
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error when processing SCTP chunks in WebRTC. A remote attacker can create a specially crafted web page, trick the victim into opening it, trigger memory corruption and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.


Affected software

Firefox ESR
Mozilla Firefox
Google Chrome
Arch Linux
Gentoo Linux
Red Hat Enterprise Linux Desktop
Red Hat Enterprise Linux for Scientific Computing
Red Hat Enterprise Linux Workstation
Red Hat Enterprise Linux Server
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for Power, big endian
CentOS
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for x86_64
Red Hat Enterprise Linux for ARM 64
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 Power, little endian - Extended Update Support
Red Hat Enterprise Linux for ARM 64 - Extended Update Support
Slackware Linux
SUSE Linux
Opensuse
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
chromium-browser (Red Hat package)
firefox (Ubuntu package)
thunderbird (Ubuntu package)
firefox-esr (Debian package)
firefox (Alpine package)
firefox-esr (Alpine package)
thunderbird (Red Hat package)
thunderbird (Debian package)
firefox (Red Hat package)
thunderbird (Alpine package)
mozjs68 (Alpine package)
chromium (Debian package)
Mozilla Thunderbird

How to mitigate CVE-2020-6831

Install updates from vendor's website.

Firefox ESR - update to 68.8.0
Mozilla Firefox - update to 76.0
chromium-browser (Red Hat package) - update to 81.0.4044.138-1.el6_10
firefox (Ubuntu package) - addressed in versions 76.0+build2-0ubuntu0.16.04.1, 76.0+build2-0ubuntu0.18.04.1, 76.0+build2-0ubuntu0.19.10.1, 76.0+build2-0ubuntu0.20.04.1, 76.0.1+build1-0ubuntu0.16.04.1, 76.0.1+build1-0ubuntu0.18.04.1, 76.0.1+build1-0ubuntu0.19.10.1, 76.0.1+build1-0ubuntu0.20.04.1
thunderbird (Ubuntu package) - addressed in versions 1:68.8.0+build2-0ubuntu0.16.04.2, 1:68.8.0+build2-0ubuntu0.18.04.2, 1:68.8.0+build2-0ubuntu0.19.10.2, 1:68.8.0+build2-0ubuntu0.20.04.2
Mozilla Thunderbird - update to 68.8.0
firefox-esr (Debian package) - addressed in versions 68.8.0esr-1~deb9u1, 68.8.0esr-1~deb10u1
firefox (Alpine package) - update to 76.0-r0
firefox-esr (Alpine package) - update to 68.8.0-r0
thunderbird (Red Hat package) - addressed in versions 68.8.0-1.el6_10, 68.8.0-1.el7_8, 68.8.0-1.el8_0, 68.8.0-1.el8_1, 68.8.0-1.el8_2
thunderbird (Debian package) - addressed in versions 1:68.8.0-1~deb8u1, 1:68.8.0-1~deb9u1, 1:68.8.0-1~deb10u1
firefox (Red Hat package) - addressed in versions 68.8.0-1.el6_10, 68.8.0-1.el7_8, 68.8.0-1.el8_0, 68.8.0-1.el8_1, 68.8.0-1.el8_2
thunderbird (Alpine package) - update to 68.8.0-r0
mozjs68 (Alpine package) - update to 68.8.0-r0
chromium (Debian package) - update to 83.0.4103.116-1~deb10u1
Google Chrome - update to 81.0.4044.138

External References

Related Security Bulletins