description: Given a compromised sandboxed content process due to a separate vulnerability, it is possible to escape that sandbox by loading accounts.firefox.com in that process and forcing a log-in to a malicious Firefox Sync account. Preference settings that disable the sandbox are then synchronized to the local machine and the compromised browser would restart without the sandbox if a crash is triggered. This vulnerability affects Firefox ESR < 60.9, Firefox ESR < 68.1, and Firefox < 69.
problem types: Sandbox escape through Firefox Sync
affected:
{
product: Firefox ESR
vendor: Mozilla
versions:
status: affected, version: before 60.9
}
{
product: Firefox ESR
vendor: Mozilla
versions:
status: affected, version: before 68.1
}
{
product: Firefox
vendor: Mozilla
versions:
status: affected, version: before 69
}
