CVE-2020-6820 — Mozilla Firefox And Thunderbird Use-After-Free Vulnerability
CVE-2020-6820: Mozilla Firefox And Thunderbird Use-After-Free Vulnerability
CISA Known Exploited Vulnerability (KEV)
| Vendor / project | Mozilla |
| Product | Firefox and Thunderbird |
| Date added | 2021-11-03 |
| Due date | 2022-05-03 |
| Ransomware campaign use | Unknown |
Description
Mozilla Firefox and Thunderbird contain a race condition vulnerability when handling a ReadableStream under certain conditions. The race condition creates a use-after-free vulnerability, causing unspecified impacts.
Required action (CISA)
Apply updates per vendor instructions.
Notes
https://nvd.nist.gov/vuln/detail/CVE-2020-6820
Weakness behind it
CISA records this vulnerability as an instance of CWE-362. From there the chain continues into CAPEC attack patterns and ATT&CK techniques, all inside this corpus.
References
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-6820
- KEV catalog: https://www.cisa.gov/known-exploited-vulnerabilities-catalog
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