By checking the result of calls to window.open with specifically set protocol handlers, an attacker could determine if the application which implements that protocol handler is installed. This vulnerability affects Firefox < 131, Firefox ESR < 128.3, Thunderbird < 128.3, and Thunderbird < 131.
{
"binaries": [
{
"binary_name": "firefox",
"binary_version": "131.0+build1.1-0ubuntu0.20.04.1"
},
{
"binary_name": "firefox-dev",
"binary_version": "131.0+build1.1-0ubuntu0.20.04.1"
},
{
"binary_name": "firefox-geckodriver",
"binary_version": "131.0+build1.1-0ubuntu0.20.04.1"
},
{
"binary_name": "firefox-mozsymbols",
"binary_version": "131.0+build1.1-0ubuntu0.20.04.1"
}
],
"availability": "No subscription required"
}