Related Vulnerabilities: CVE-2019-11708  

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.

Severity High

Remote Yes

Type Arbitrary code execution

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.

AVG-997 firefox 67.0.3-1 High Vulnerable

https://www.mozilla.org/en-US/security/advisories/mfsa2019-19/#CVE-2019-11708