description: Inside the JavaScript parser, a cast of an integer to a narrower type can result in data read from outside the buffer being parsed. This usually results in a non-exploitable crash, but can leak a limited amount of information from memory if it matches JavaScript identifier syntax. This vulnerability affects Firefox < 56.
problem types: Integer truncation in the JavaScript parser
affected:
{
product: Firefox
vendor: Mozilla
versions:
lessThan: 56, status: affected, version: unspecified, versionType: custom
}