{"id":"USN-3833-1","summary":"linux-aws vulnerabilities","details":"Jann Horn discovered that the Linux kernel mishandles mapping UID or GID\nranges inside nested user namespaces in some situations. A local attacker\ncould use this to bypass access controls on resources outside the\nnamespace. (CVE-2018-18955)\n\nPhilipp Wendler discovered that the overlayfs implementation in the Linux\nkernel did not properly verify the directory contents permissions from\nwithin a unprivileged user namespace. A local attacker could use this to\nexpose sensitive information (protected file names). (CVE-2018-6559)\n","modified":"2026-02-10T04:41:27Z","published":"2018-11-30T06:31:39Z","related":["UBUNTU-CVE-2018-18955","UBUNTU-CVE-2018-6559"],"upstream":["CVE-2018-18955","CVE-2018-6559","UBUNTU-CVE-2018-18955","UBUNTU-CVE-2018-6559"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-3833-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2018-6559"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2018-18955"}],"affected":[{"package":{"name":"linux-aws","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/linux-aws@4.15.0-1029.30?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.15.0-1029.30"}]}],"versions":["4.15.0-1001.1","4.15.0-1003.3","4.15.0-1005.5","4.15.0-1006.6","4.15.0-1007.7","4.15.0-1009.9","4.15.0-1010.10","4.15.0-1011.11","4.15.0-1016.16","4.15.0-1017.17","4.15.0-1019.19","4.15.0-1020.20","4.15.0-1021.21","4.15.0-1023.23","4.15.0-1025.25","4.15.0-1027.27"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"linux-aws-cloud-tools-4.15.0-1029","binary_version":"4.15.0-1029.30"},{"binary_name":"linux-aws-headers-4.15.0-1029","binary_version":"4.15.0-1029.30"},{"binary_name":"linux-aws-tools-4.15.0-1029","binary_version":"4.15.0-1029.30"},{"binary_name":"linux-cloud-tools-4.15.0-1029-aws","binary_version":"4.15.0-1029.30"},{"binary_name":"linux-headers-4.15.0-1029-aws","binary_version":"4.15.0-1029.30"},{"binary_name":"linux-image-4.15.0-1029-aws","binary_version":"4.15.0-1029.30"},{"binary_version":"4.15.0-1029.30","binary_name":"linux-modules-4.15.0-1029-aws"},{"binary_name":"linux-tools-4.15.0-1029-aws","binary_version":"4.15.0-1029.30"}]},"database_specific":{"cves_map":{"cves":[{"id":"CVE-2018-6559","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N"},{"type":"Ubuntu","score":"low"}]},{"severity":[{"score":"CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2018-18955"}],"ecosystem":"Ubuntu:18.04:LTS"},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-3833-1.json"}}],"schema_version":"1.7.3"}