{"id":"UBUNTU-CVE-2023-5871","details":"A flaw was found in libnbd, due to a malicious Network Block Device (NBD), a protocol for accessing Block Devices such as hard disks over a Network. This issue may allow a malicious NBD server to cause a Denial of Service.","modified":"2026-04-22T14:34:27.646025Z","published":"2023-11-27T12:15:00Z","upstream":["CVE-2023-5871"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2023-5871"},{"type":"REPORT","url":"https://lists.libguestfs.org/archives/list/guestfs@lists.libguestfs.org/thread/PFVUCMPFQUDC23JXSCUUPXIGDZ7XCFMD/"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2023-5871"}],"affected":[{"package":{"name":"libnbd","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/libnbd@1.2.2-1ubuntu2?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.0.3-1","1.2.1-2","1.2.2-1ubuntu2"],"ecosystem_specific":{"binaries":[{"binary_version":"1.2.2-1ubuntu2","binary_name":"libnbd-ocaml"},{"binary_name":"libnbd0","binary_version":"1.2.2-1ubuntu2"},{"binary_name":"nbdfuse","binary_version":"1.2.2-1ubuntu2"},{"binary_name":"python3-libnbd","binary_version":"1.2.2-1ubuntu2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2023/UBUNTU-CVE-2023-5871.json"}},{"package":{"name":"libnbd","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/libnbd@1.10.5-1?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.6.3-1","1.8.5-1","1.10.2-1","1.10.5-1"],"ecosystem_specific":{"binaries":[{"binary_name":"libnbd-bin","binary_version":"1.10.5-1"},{"binary_name":"libnbd-ocaml","binary_version":"1.10.5-1"},{"binary_name":"libnbd0","binary_version":"1.10.5-1"},{"binary_name":"python3-libnbd","binary_version":"1.10.5-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2023/UBUNTU-CVE-2023-5871.json"}},{"package":{"name":"libnbd","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/libnbd@1.20.0-1?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.16.4-1","1.18.1-1","1.18.2-1","1.18.2-1build1","1.18.2-2","1.18.2-2build1","1.20.0-1"],"ecosystem_specific":{"binaries":[{"binary_name":"libnbd-bin","binary_version":"1.20.0-1"},{"binary_version":"1.20.0-1","binary_name":"libnbd-ocaml"},{"binary_name":"libnbd0","binary_version":"1.20.0-1"},{"binary_name":"python3-libnbd","binary_version":"1.20.0-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2023/UBUNTU-CVE-2023-5871.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"},{"type":"Ubuntu","score":"medium"}]}