CVE-2019-11707: Mozilla Firefox and Thunderbird Type Confusion Vulnerability
Mozilla Firefox and Thunderbird contain a type confusion vulnerability that can occur when manipulating JavaScript objects due to issues in Array.pop, allowing for an exploitable crash.
| Vendor | Mozilla |
|---|---|
| Product | Firefox and Thunderbird |
| Date added to KEV | 2022-05-23 |
| Due date (BOD 22-01) | 2022-06-13 |
| Known ransomware campaign use | Unknown |
| CWE | CWE-843 |
| Required action | Apply updates per vendor instructions. |
What to do
- Identify every instance of Mozilla Firefox and Thunderbird in your environment (asset inventory, EDR, vulnerability scanner).
- Apply CISA's required action: Apply updates per vendor instructions.
- Federal civilian agencies must act by 2022-06-13 under BOD 22-01; other organizations can use the same date as a target.
- Check the vendor advisory and NVD entry linked below for affected versions, then record the fix in your change log.
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Sources
- NVD entry for CVE-2019-11707 (severity scores, if any, live there)
- CISA KEV catalog entry
- https://nvd.nist.gov/vuln/detail/CVE-2019-11707