description: The Mozilla Maintenance Service "helper.exe" application creates a temporary directory writable by non-privileged users. When this is combined with creation of a junction (a form of symbolic link), protected files in the target directory of the junction can be deleted by the Mozilla Maintenance Service, which has privileged access. Note: This attack requires local system access and only affects Windows. Other operating systems are not affected. This vulnerability affects Firefox ESR < 52.2 and Firefox < 54.
problem types: File deletion and privilege escalation through Mozilla Maintenance Service helper.exe application
affected:
{
product: Firefox ESR
vendor: Mozilla
versions:
lessThan: 52.2, status: affected, version: unspecified, versionType: custom
}
{
product: Firefox
vendor: Mozilla
versions:
lessThan: 54, status: affected, version: unspecified, versionType: custom
}
