Limitations on the URIs allowed to WebExtensions by the browser.windows.create API can be bypassed when a pipe in the URL field is used within the extension to load multiple pages as a single argument. This could allow a malicious WebExtension to open privileged about: or file: locations. This vulnerability affects Firefox < 64.
{ "binaries": [ { "binary_version": "64.0+build3-0ubuntu0.14.04.1", "binary_name": "firefox" }, { "binary_version": "64.0+build3-0ubuntu0.14.04.1", "binary_name": "firefox-dev" }, { "binary_version": "64.0+build3-0ubuntu0.14.04.1", "binary_name": "firefox-globalmenu" }, { "binary_version": "64.0+build3-0ubuntu0.14.04.1", "binary_name": "firefox-mozsymbols" }, { "binary_version": "64.0+build3-0ubuntu0.14.04.1", "binary_name": "firefox-testsuite" } ], "availability": "No subscription required" }
{ "binaries": [ { "binary_version": "64.0+build3-0ubuntu0.16.04.1", "binary_name": "firefox" }, { "binary_version": "64.0+build3-0ubuntu0.16.04.1", "binary_name": "firefox-dev" }, { "binary_version": "64.0+build3-0ubuntu0.16.04.1", "binary_name": "firefox-globalmenu" }, { "binary_version": "64.0+build3-0ubuntu0.16.04.1", "binary_name": "firefox-mozsymbols" }, { "binary_version": "64.0+build3-0ubuntu0.16.04.1", "binary_name": "firefox-testsuite" } ], "availability": "No subscription required" }
{ "binaries": [ { "binary_version": "64.0+build3-0ubuntu0.18.04.1", "binary_name": "firefox" }, { "binary_version": "64.0+build3-0ubuntu0.18.04.1", "binary_name": "firefox-dev" }, { "binary_version": "64.0+build3-0ubuntu0.18.04.1", "binary_name": "firefox-globalmenu" }, { "binary_version": "64.0+build3-0ubuntu0.18.04.1", "binary_name": "firefox-mozsymbols" }, { "binary_version": "64.0+build3-0ubuntu0.18.04.1", "binary_name": "firefox-testsuite" } ], "availability": "No subscription required" }