{"id":"UBUNTU-CVE-2021-29983","details":"Firefox for Android could get stuck in fullscreen mode and not exit it even after normal interactions that should cause it to exit. *Note: This issue only affected Firefox for Android. Other operating systems are unaffected.*. This vulnerability affects Firefox \u003c 91.","modified":"2025-10-24T04:50:17Z","published":"2021-08-17T20:15:00Z","upstream":["CVE-2021-29983"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-29983"},{"type":"REPORT","url":"https://www.mozilla.org/en-US/security/advisories/mfsa2021-33/#CVE-2021-29983"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2021-29983"}],"affected":[{"package":{"name":"mozjs52","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/mozjs52@52.9.1-0ubuntu0.18.04.1?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["52.3.1-0ubuntu3","52.3.1-7fakesync1","52.8.1-0ubuntu0.18.04.1","52.9.1-0ubuntu0.18.04.1"],"ecosystem_specific":{"binaries":[{"binary_version":"52.9.1-0ubuntu0.18.04.1","binary_name":"libmozjs-52-0"},{"binary_version":"52.9.1-0ubuntu0.18.04.1","binary_name":"libmozjs-52-dev"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-29983.json"}},{"package":{"name":"mozjs38","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/mozjs38@38.8.0~repack1-0ubuntu4?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["38.8.0~repack1-0ubuntu1","38.8.0~repack1-0ubuntu3","38.8.0~repack1-0ubuntu4"],"ecosystem_specific":{"binaries":[{"binary_version":"38.8.0~repack1-0ubuntu4","binary_name":"libmozjs-38-0"},{"binary_version":"38.8.0~repack1-0ubuntu4","binary_name":"libmozjs-38-dev"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-29983.json"}},{"package":{"name":"mozjs68","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/mozjs68@68.6.0-1ubuntu1?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["68.5.0-1~fakesync","68.5.0-2~fakesync","68.6.0-1","68.6.0-1ubuntu1"],"ecosystem_specific":{"binaries":[{"binary_version":"68.6.0-1ubuntu1","binary_name":"libmozjs-68-0"},{"binary_version":"68.6.0-1ubuntu1","binary_name":"libmozjs-68-dev"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-29983.json"}},{"package":{"name":"mozjs52","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/mozjs52@52.9.1-1ubuntu3?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["52.9.1-1build1","52.9.1-1ubuntu3"],"ecosystem_specific":{"binaries":[{"binary_version":"52.9.1-1ubuntu3","binary_name":"libmozjs-52-0"},{"binary_version":"52.9.1-1ubuntu3","binary_name":"libmozjs-52-dev"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-29983.json"}},{"package":{"name":"mozjs78","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/mozjs78@78.15.0-4ubuntu1?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["78.13.0-1","78.15.0-2","78.15.0-4ubuntu1"],"ecosystem_specific":{"binaries":[{"binary_version":"78.15.0-4ubuntu1","binary_name":"libmozjs-78-0"},{"binary_version":"78.15.0-4ubuntu1","binary_name":"libmozjs-78-dev"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-29983.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N"},{"type":"Ubuntu","score":"medium"}]}