Algorithm Downgrade in Mozilla Firefox - CVE-2019-17023

Vulnerability identifier: #VU24061

CSH Severity: Low

CVSS v4: 6.3 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]

CVE-ID: CVE-2019-17023

CWE-ID: CWE-757

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to bypass certain security restrictions.

The vulnerability exists due to insecure negotiation After a HelloRetryRequest in Mozilla NSS that can lead to selection of a less secure protocol (e.g. TLS 1.2 or below) after the HelloRetryRequest TLS 1.3 is sent.

Mozilla Firefox
Arch Linux
Amazon Linux AMI
Debian Linux
Red Hat Enterprise Linux Server
Red Hat Enterprise Linux Workstation
Red Hat Enterprise Linux Desktop
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for Power, big endian
Red Hat Enterprise Linux for Scientific Computing
Red Hat Enterprise Linux for Power, little endian
CentOS
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 Server - AUS
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 Server - TUS
Red Hat Enterprise Linux for ARM 64 - Extended Update Support
Slackware Linux
Ansible Automation Platform
firefox (Ubuntu package)
firefox (Alpine package)
nss (Debian package)
nss-util (Red Hat package)
nss (Red Hat package)
nss-softokn (Red Hat package)
nspr (Red Hat package)
Data Computing Appliance (DCA)
OpenShift Virtualization
Red Hat OpenShift Container Platform

Install updates from vendor's website.

Mozilla Firefox - update to 72.0
Ansible Automation Platform - addressed in versions 1.0, 1.1, 1.2.4
firefox (Ubuntu package) - addressed in versions 72.0.1+build1-0ubuntu0.16.04.1, 72.0.1+build1-0ubuntu0.18.04.1, 72.0.1+build1-0ubuntu0.19.04.1, 72.0.1+build1-0ubuntu0.19.10.1
firefox (Alpine package) - update to 72.0.1-r0
Data Computing Appliance (DCA) - addressed in versions Firmware tool 3H00, 4.2.1.0
OpenShift Virtualization - update to 2.4.2
nss (Debian package) - update to 2:3.42.1-1+deb10u3
nss-util (Red Hat package) - update to 3.53.1-1.el7_9
nss (Red Hat package) - addressed in versions 3.53.1-3.el7_9, 3.53.1-11.el8_2
nss-softokn (Red Hat package) - update to 3.53.1-6.el7_9
Red Hat OpenShift Container Platform - update to 4.3.40
nspr (Red Hat package) - addressed in versions 4.25.0-2.el7_9, 4.25.0-2.el8_2

• https://www.mozilla.org/en-US/security/advisories/mfsa2020-01/

• Multiple vulnerabilities in Mozilla Firefox and Firefox ESR
• Arch Linux update for firefox
• Slackware Linux update for mozilla-firefox
• Ubuntu update for Firefox
• Algorithm Downgrade in firefox (Alpine package)
• Red Hat Enterprise Linux 7 update for nss and nspr
• CentOS 7 update for nss
• Amazon Linux AMI update for nspr, nss-softokn, nss-util
• Debian update for nss
• Multiple vulnerabilities in Dell EMC Data Computing Appliance (DCA)
• Red Hat Enterprise Linux 8 update for nss and nspr
• Multiple vulnerabilities in Red Hat Ansible Automation Platform 1.2
• Multiple vulnerabilities in OpenShift Virtualization 2.4
• Multiple vulnerabilities in Ansible Automation Platform 1.0 packages
• Multiple vulnerabilities in Ansible Automation Platform 1.1 packages
• Multiple vulnerabilities in Red Hat OpenShift Container Platform 4.3