{"id":"USN-4760-1","summary":"libzstd vulnerabilities","details":"It was discovered that libzstd incorrectly handled file permissions. A\nlocal attacker could possibly use this issue to access certain files,\ncontrary to expectations.\n","modified":"2026-02-10T04:42:05Z","published":"2021-03-08T18:21:54Z","related":["UBUNTU-CVE-2021-24031","UBUNTU-CVE-2021-24032"],"upstream":["CVE-2021-24031","CVE-2021-24032","UBUNTU-CVE-2021-24031","UBUNTU-CVE-2021-24032"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-4760-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-24031"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-24032"}],"affected":[{"package":{"name":"libzstd","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/libzstd@1.3.3+dfsg-2ubuntu1.2?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.3.3+dfsg-2ubuntu1.2"}]}],"versions":["1.3.1+dfsg-1","1.3.2+dfsg-1","1.3.2+dfsg2-1","1.3.3+dfsg-1","1.3.3+dfsg-1ubuntu1","1.3.3+dfsg-2ubuntu1","1.3.3+dfsg-2ubuntu1.1"],"ecosystem_specific":{"binaries":[{"binary_version":"1.3.3+dfsg-2ubuntu1.2","binary_name":"libzstd-dev"},{"binary_version":"1.3.3+dfsg-2ubuntu1.2","binary_name":"libzstd1"},{"binary_version":"1.3.3+dfsg-2ubuntu1.2","binary_name":"libzstd1-dev"},{"binary_version":"1.3.3+dfsg-2ubuntu1.2","binary_name":"zstd"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-4760-1.json","cves_map":{"cves":[{"id":"CVE-2021-24031","severity":[{"score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}]},{"id":"CVE-2021-24032","severity":[{"score":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}]}],"ecosystem":"Ubuntu:18.04:LTS"}}},{"package":{"name":"libzstd","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/libzstd@1.4.4+dfsg-3ubuntu0.1?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.4.4+dfsg-3ubuntu0.1"}]}],"versions":["1.4.3+dfsg-1","1.4.4+dfsg-1","1.4.4+dfsg-3"],"ecosystem_specific":{"binaries":[{"binary_version":"1.4.4+dfsg-3ubuntu0.1","binary_name":"libzstd-dev"},{"binary_version":"1.4.4+dfsg-3ubuntu0.1","binary_name":"libzstd1"},{"binary_version":"1.4.4+dfsg-3ubuntu0.1","binary_name":"zstd"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-4760-1.json","cves_map":{"cves":[{"id":"CVE-2021-24031","severity":[{"score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}]},{"id":"CVE-2021-24032","severity":[{"score":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}]}],"ecosystem":"Ubuntu:20.04:LTS"}}}],"schema_version":"1.7.3"}