{"id":"UBUNTU-CVE-2020-29481","details":"An issue was discovered in Xen through 4.14.x. Access rights of Xenstore nodes are per domid. Unfortunately, existing granted access rights are not removed when a domain is being destroyed. This means that a new domain created with the same domid will inherit the access rights to Xenstore nodes from the previous domain(s) with the same domid. Because all Xenstore entries of a guest below /local/domain/\u003cdomid\u003e are being deleted by Xen tools when a guest is destroyed, only Xenstore entries of other guests still running are affected. For example, a newly created guest domain might be able to read sensitive information that had belonged to a previously existing guest domain. Both Xenstore implementations (C and Ocaml) are vulnerable.","modified":"2025-10-24T04:48:56Z","published":"2020-12-15T18:15:00Z","upstream":["CVE-2020-29481"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2020-29481"},{"type":"REPORT","url":"https://xenbits.xen.org/xsa/advisory-322.html"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2020-29481"}],"affected":[{"package":{"name":"xen","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/xen@4.6.5-0ubuntu1.4?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.5.1-0ubuntu1","4.5.1-0ubuntu2","4.6.0-1ubuntu1","4.6.0-1ubuntu2","4.6.0-1ubuntu4","4.6.0-1ubuntu4.1","4.6.0-1ubuntu4.2","4.6.0-1ubuntu4.3","4.6.5-0ubuntu1","4.6.5-0ubuntu1.1","4.6.5-0ubuntu1.2","4.6.5-0ubuntu1.4"],"ecosystem_specific":{"binaries":[{"binary_name":"libxen-4.6","binary_version":"4.6.5-0ubuntu1.4"},{"binary_name":"libxen-dev","binary_version":"4.6.5-0ubuntu1.4"},{"binary_name":"libxenstore3.0","binary_version":"4.6.5-0ubuntu1.4"},{"binary_name":"xen-hypervisor-4.4-amd64","binary_version":"4.6.5-0ubuntu1.4"},{"binary_name":"xen-hypervisor-4.4-arm64","binary_version":"4.6.5-0ubuntu1.4"},{"binary_name":"xen-hypervisor-4.4-armhf","binary_version":"4.6.5-0ubuntu1.4"},{"binary_name":"xen-hypervisor-4.5-amd64","binary_version":"4.6.5-0ubuntu1.4"},{"binary_name":"xen-hypervisor-4.5-arm64","binary_version":"4.6.5-0ubuntu1.4"},{"binary_name":"xen-hypervisor-4.5-armhf","binary_version":"4.6.5-0ubuntu1.4"},{"binary_name":"xen-hypervisor-4.6-amd64","binary_version":"4.6.5-0ubuntu1.4"},{"binary_name":"xen-hypervisor-4.6-arm64","binary_version":"4.6.5-0ubuntu1.4"},{"binary_name":"xen-hypervisor-4.6-armhf","binary_version":"4.6.5-0ubuntu1.4"},{"binary_name":"xen-system-amd64","binary_version":"4.6.5-0ubuntu1.4"},{"binary_name":"xen-system-arm64","binary_version":"4.6.5-0ubuntu1.4"},{"binary_name":"xen-system-armhf","binary_version":"4.6.5-0ubuntu1.4"},{"binary_name":"xen-utils-4.6","binary_version":"4.6.5-0ubuntu1.4"},{"binary_name":"xen-utils-common","binary_version":"4.6.5-0ubuntu1.4"},{"binary_name":"xenstore-utils","binary_version":"4.6.5-0ubuntu1.4"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-29481.json"}},{"package":{"name":"xen","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/xen@4.9.2-0ubuntu1?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.9.0-0ubuntu3","4.9.0-0ubuntu4","4.9.2-0ubuntu1"],"ecosystem_specific":{"binaries":[{"binary_name":"libxen-4.9","binary_version":"4.9.2-0ubuntu1"},{"binary_name":"libxen-dev","binary_version":"4.9.2-0ubuntu1"},{"binary_name":"libxenstore3.0","binary_version":"4.9.2-0ubuntu1"},{"binary_name":"xen-hypervisor-4.6-amd64","binary_version":"4.9.2-0ubuntu1"},{"binary_name":"xen-hypervisor-4.6-arm64","binary_version":"4.9.2-0ubuntu1"},{"binary_name":"xen-hypervisor-4.6-armhf","binary_version":"4.9.2-0ubuntu1"},{"binary_name":"xen-hypervisor-4.7-amd64","binary_version":"4.9.2-0ubuntu1"},{"binary_name":"xen-hypervisor-4.7-arm64","binary_version":"4.9.2-0ubuntu1"},{"binary_name":"xen-hypervisor-4.7-armhf","binary_version":"4.9.2-0ubuntu1"},{"binary_name":"xen-hypervisor-4.8-amd64","binary_version":"4.9.2-0ubuntu1"},{"binary_name":"xen-hypervisor-4.8-arm64","binary_version":"4.9.2-0ubuntu1"},{"binary_name":"xen-hypervisor-4.8-armhf","binary_version":"4.9.2-0ubuntu1"},{"binary_name":"xen-hypervisor-4.9-amd64","binary_version":"4.9.2-0ubuntu1"},{"binary_name":"xen-hypervisor-4.9-arm64","binary_version":"4.9.2-0ubuntu1"},{"binary_name":"xen-hypervisor-4.9-armhf","binary_version":"4.9.2-0ubuntu1"},{"binary_name":"xen-system-amd64","binary_version":"4.9.2-0ubuntu1"},{"binary_name":"xen-system-arm64","binary_version":"4.9.2-0ubuntu1"},{"binary_name":"xen-system-armhf","binary_version":"4.9.2-0ubuntu1"},{"binary_name":"xen-utils-4.9","binary_version":"4.9.2-0ubuntu1"},{"binary_name":"xen-utils-common","binary_version":"4.9.2-0ubuntu1"},{"binary_name":"xenstore-utils","binary_version":"4.9.2-0ubuntu1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-29481.json"}},{"package":{"name":"xen","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/xen@4.11.3+24-g14b62ab3e5-1ubuntu2.3?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.9.2-0ubuntu2","4.9.2-0ubuntu6","4.9.2-0ubuntu7","4.11.3+24-g14b62ab3e5-1ubuntu1","4.11.3+24-g14b62ab3e5-1ubuntu2","4.11.3+24-g14b62ab3e5-1ubuntu2.2","4.11.3+24-g14b62ab3e5-1ubuntu2.3"],"ecosystem_specific":{"binaries":[{"binary_name":"libxen-dev","binary_version":"4.11.3+24-g14b62ab3e5-1ubuntu2.3"},{"binary_name":"libxencall1","binary_version":"4.11.3+24-g14b62ab3e5-1ubuntu2.3"},{"binary_name":"libxendevicemodel1","binary_version":"4.11.3+24-g14b62ab3e5-1ubuntu2.3"},{"binary_name":"libxenevtchn1","binary_version":"4.11.3+24-g14b62ab3e5-1ubuntu2.3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