CVE-2020-12390: Critical severity Mozilla Firefox vulnerability
Incorrect origin serialization of URLs with IPv6 addresses could lead to incorrect security checks. This vulnerability affects Firefox < 76.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
ubuntu/firefoxto a version that resolves this vulnerability.Fixed in 76.0+ - Upgrade
Upgrade
ubuntu/firefoxto a version that resolves this vulnerability.Fixed in 76.0 - Upgrade
Upgrade
debian/firefoxto a version that resolves this vulnerability.Fixed in 130.0-2 - Upgrade
Upgrade
Firefoxto a version that resolves this vulnerability.Fixed in 76 - Upgrade
Upgrade
alpine/firefoxto a version that resolves this vulnerability.Fixed in 76.0-r0 - Upgrade
Upgrade
alpine/librewolfto a version that resolves this vulnerability.Fixed in 76.0-r0
Event History
Peer vulnerabilities
Found alongside the following vulnerabilities.
Frequently Asked Questions
What is the severity of CVE-2020-12390?
CVE-2020-12390 is classified as a moderate severity vulnerability affecting Firefox versions prior to 76.
How do I fix CVE-2020-12390?
To fix CVE-2020-12390, upgrade your Firefox browser to version 76 or later.
Which versions of Firefox are affected by CVE-2020-12390?
All versions of Firefox prior to 76 are affected by CVE-2020-12390.
What type of security issue does CVE-2020-12390 cause?
CVE-2020-12390 can lead to incorrect origin serialization of URLs, affecting security checks.
Is there any specific platform where CVE-2020-12390 is relevant?
CVE-2020-12390 is relevant for all platforms running affected versions of Firefox, including various Ubuntu and Debian packages.