Mozilla Firefox and Thunderbird Type Confusion Vulnerability (CVE-2019-11707)
Severity: high · Patch status: patched · Since 2022-05-23 · CVE-2019-11707
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. CISA added CVE-2019-11707 to its Known Exploited Vulnerabilities catalog on May 23, 2022, which means attackers are exploiting it in the wild.
What to do
- Apply updates per vendor instructions.
- US federal agencies must remediate by Jun 13, 2022 (BOD 22-01); treat that as the outer limit.
Sources
All live incidents on Threat Watch