Mozilla Firefox before 44.0.2 does not properly restrict the interaction between Service Workers and plugins, which allows remote attackers to bypass the Same Origin Policy via a crafted web site that triggers spoofed responses to requests that use NPAPI, as demonstrated by a request for a crossdomain.xml file.
{
"binaries": [
{
"binary_version": "44.0.2+build1-0ubuntu0.14.04.1",
"binary_name": "firefox"
},
{
"binary_version": "44.0.2+build1-0ubuntu0.14.04.1",
"binary_name": "firefox-dev"
},
{
"binary_version": "44.0.2+build1-0ubuntu0.14.04.1",
"binary_name": "firefox-globalmenu"
},
{
"binary_version": "44.0.2+build1-0ubuntu0.14.04.1",
"binary_name": "firefox-mozsymbols"
},
{
"binary_version": "44.0.2+build1-0ubuntu0.14.04.1",
"binary_name": "firefox-testsuite"
}
],
"availability": "No subscription required"
}