{"id":"USN-5057-1","summary":"squashfs-tools vulnerability","details":"Etienne Stalmans discovered that Squashfs-Tools mishandled certain malformed SQUASHFS files. An attacker could use this vulnerability to write arbitrary files to the filesystem.\n","modified":"2026-02-10T04:42:17Z","published":"2021-08-31T00:34:13Z","related":["UBUNTU-CVE-2021-40153"],"upstream":["CVE-2021-40153","UBUNTU-CVE-2021-40153"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-5057-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-40153"}],"affected":[{"package":{"name":"squashfs-tools","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/squashfs-tools@1:4.3-6ubuntu0.18.04.3?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:4.3-6ubuntu0.18.04.3"}]}],"versions":["1:4.3-4ubuntu1","1:4.3-4ubuntu2","1:4.3-6","1:4.3-6ubuntu0.18.04.1","1:4.3-6ubuntu0.18.04.2"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"squashfs-tools","binary_version":"1:4.3-6ubuntu0.18.04.3"}]},"database_specific":{"cves_map":{"cves":[{"severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2021-40153"}],"ecosystem":"Ubuntu:18.04:LTS"},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-5057-1.json"}},{"package":{"name":"squashfs-tools","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/squashfs-tools@1:4.4-1ubuntu0.1?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:4.4-1ubuntu0.1"}]}],"versions":["1:4.4-1"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"squashfs-tools","binary_version":"1:4.4-1ubuntu0.1"}]},"database_specific":{"cves_map":{"cves":[{"severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2021-40153"}],"ecosystem":"Ubuntu:20.04:LTS"},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-5057-1.json"}}],"schema_version":"1.7.3"}