description: An attacker could use a JavaScript Map/Set timing attack to determine whether an atom is used by another compartment/zone in specific contexts. This could be used to leak information, such as usernames embedded in JavaScript code, across websites. This vulnerability affects Firefox < 50.1, Firefox ESR < 45.6, and Thunderbird < 45.6.
problem types: Cross-origin information leak in shared atoms
affected:
{
product: Firefox
vendor: Mozilla
versions:
lessThan: 50.1, status: affected, version: unspecified, versionType: custom
}
{
product: Firefox ESR
vendor: Mozilla
versions:
lessThan: 45.6, status: affected, version: unspecified, versionType: custom
}
{
product: Thunderbird
vendor: Mozilla
versions:
lessThan: 45.6, status: affected, version: unspecified, versionType: custom
}
