CVE-2020-6819 · netVigilance record NV21-0163
Mozilla Firefox And Thunderbird Use-After-Free
past due
What to do
Apply updates per vendor instructions.
CISA deadline 2022-05-03 · passed 4 years 4 months ago · applies to US federal civilian agencies; used elsewhere as a reference SLA
What happened
Mozilla Firefox and Thunderbird contain a race condition vulnerability when running the nsDocShell destructor under certain conditions. The race condition creates a use-after-free vulnerability, causing unspecified impacts.
Who is affected
Mozilla Firefox and Thunderbird. Affected version ranges are listed in the vendor advisory and the NVD entry linked under Sources.
Weakness class: CWE-362, CWE-416.
Timeline
- Added to CISA KEVExploitation in the wild confirmed by CISA
- CISA remediation deadlinepassed 4 years 4 months ago
Sources
- NVD entry for CVE-2020-6819 nvd.nist.gov/vuln/detail/CVE-2020-6819
- CISA Known Exploited Vulnerabilities catalog www.cisa.gov/known-exploited-vulnerabilities-catalog
- nvd.nist.gov nvd.nist.gov/vuln/detail/CVE-2020-6819