Firefox adds web-compatibility shims in place of some tracking scripts blocked by Enhanced Tracking Protection. On a site protected by Content Security Policy in "strict-dynamic" mode, an attacker able to inject an HTML element could have used a DOM Clobbering attack on some of the shims and achieved XSS, bypassing the CSP strict-dynamic protection. This vulnerability affects Firefox < 129, Firefox ESR < 115.14, and Firefox ESR < 128.1.
{
"availability": "No subscription required",
"binaries": [
{
"binary_version": "129.0.1+build1-0ubuntu0.20.04.1",
"binary_name": "firefox"
},
{
"binary_version": "129.0.1+build1-0ubuntu0.20.04.1",
"binary_name": "firefox-dev"
},
{
"binary_version": "129.0.1+build1-0ubuntu0.20.04.1",
"binary_name": "firefox-geckodriver"
},
{
"binary_version": "129.0.1+build1-0ubuntu0.20.04.1",
"binary_name": "firefox-mozsymbols"
}
]
}