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[ CVE-2019-11708 · Published 23 Jul 2019 ]

Mozilla Firefox and Thunderbird Sandbox Escape Vulnerability

Exploited · CISA KEV CVSS 10.0 EPSS 56%No fix listed yet

[ Why it matters ]Priority signals

  • Exploited in the wild: on CISA's Known Exploited Vulnerabilities list since 2022-05-23
  • EPSS: 56% chance of exploitation in the next 30 days (higher than 99% of CVEs)
  • Critical severity: CVSS 10.0

[ Description ]Official description

Insufficient vetting of parameters passed with the Prompt:Open IPC message between child and parent processes can result in the non-sandboxed parent process opening web content chosen by a compromised child process. When combined with additional vulnerabilities this could result in executing arbitrary code on the user's computer. This vulnerability affects Firefox ESR < 60.7.2, Firefox < 67.0.4, and Thunderbird < 60.7.2.

CISA: Mozilla Firefox and Thunderbird contain a sandbox escape vulnerability that could result in remote code execution.

[ Fixes ]Fixes and patches

CISA required action (US federal deadline 13 Jun 2022): Apply updates per vendor instructions.

No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.

[ References ]References