{"id":"UBUNTU-CVE-2023-46218","details":"This flaw allows a malicious HTTP server to set \"super cookies\" in curl that are then passed back to more origins than what is otherwise allowed or possible. This allows a site to set cookies that then would get sent to different and unrelated sites and domains. It could do this by exploiting a mixed case flaw in curl's function that verifies a given cookie domain against the Public Suffix List (PSL). For example a cookie could be set with `domain=co.UK` when the URL used a lower case hostname `curl.co.uk`, even though `co.uk` is listed as a PSL domain.","modified":"2026-04-22T16:54:51.417401Z","published":"2023-12-06T07:00:00Z","related":["USN-6535-1","USN-6641-1"],"upstream":["CVE-2023-46218"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2023-46218"},{"type":"REPORT","url":"https://curl.se/docs/CVE-2023-46218.html"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-6535-1"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-6641-1"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2023-46218"}],"affected":[{"package":{"name":"curl","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/curl@7.47.0-1ubuntu2.19+esm11?arch=source&distro=esm-infra/xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"7.47.0-1ubuntu2.19+esm11"}]}],"versions":["7.43.0-1ubuntu2","7.45.0-1ubuntu1","7.46.0-1ubuntu1","7.47.0-1ubuntu1","7.47.0-1ubuntu2","7.47.0-1ubuntu2.1","7.47.0-1ubuntu2.2","7.47.0-1ubuntu2.3","7.47.0-1ubuntu2.4","7.47.0-1ubuntu2.5","7.47.0-1ubuntu2.6","7.47.0-1ubuntu2.7","7.47.0-1ubuntu2.8","7.47.0-1ubuntu2.9","7.47.0-1ubuntu2.11","7.47.0-1ubuntu2.12","7.47.0-1ubuntu2.13","7.47.0-1ubuntu2.14","7.47.0-1ubuntu2.15","7.47.0-1ubuntu2.16","7.47.0-1ubuntu2.18","7.47.0-1ubuntu2.19","7.47.0-1ubuntu2.19+esm1","7.47.0-1ubuntu2.19+esm2","7.47.0-1ubuntu2.19+esm3","7.47.0-1ubuntu2.19+esm4","7.47.0-1ubuntu2.19+esm5","7.47.0-1ubuntu2.19+esm6","7.47.0-1ubuntu2.19+esm7","7.47.0-1ubuntu2.19+esm8","7.47.0-1ubuntu2.19+esm9","7.47.0-1ubuntu2.19+esm10"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro","binaries":[{"binary_name":"curl","binary_version":"7.47.0-1ubuntu2.19+esm11"},{"binary_name":"libcurl3","binary_version":"7.47.0-1ubuntu2.19+esm11"},{"binary_name":"libcurl3-gnutls","binary_version":"7.47.0-1ubuntu2.19+esm11"},{"binary_name":"libcurl3-nss","binary_version":"7.47.0-1ubuntu2.19+esm11"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2023/UBUNTU-CVE-2023-46218.json"}},{"package":{"name":"curl","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/curl@7.58.0-2ubuntu3.24+esm3?arch=source&distro=esm-infra/bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"7.58.0-2ubuntu3.24+esm3"}]}],"versions":["7.55.1-1ubuntu2","7.55.1-1ubuntu2.1","7.57.0-1ubuntu1","7.58.0-2ubuntu1","7.58.0-2ubuntu2","7.58.0-2ubuntu3","7.58.0-2ubuntu3.1","7.58.0-2ubuntu3.2","7.58.0-2ubuntu3.3","7.58.0-2ubuntu3.5","7.58.0-2ubuntu3.6","7.58.0-2ubuntu3.7","7.58.0-2ubuntu3.8","7.58.0-2ubuntu3.9","7.58.0-2ubuntu3.10","7.58.0-2ubuntu3.12","7.58.0-2ubuntu3.13","7.58.0-2ubuntu3.14","7.58.0-2ubuntu3.15","7.58.0-2ubuntu3.16","7.58.0-2ubuntu3.17","7.58.0-2ubuntu3.18","7.58.0-2ubuntu3.19","7.58.0-2ubuntu3.20","7.58.0-2ubuntu3.21","7.58.0-2ubuntu3.22","7.58.0-2ubuntu3.23","7.58.0-2ubuntu3.24","7.58.0-2ubuntu3.24+esm1","7.58.0-2ubuntu3.24+esm2"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro","binaries":[{"binary_name":"curl","binary_version":"7.58.0-2ubuntu3.24+esm3"},{"binary_version":"7.58.0-2ubuntu3.24+esm3","binary_name":"libcurl3-gnutls"},{"binary_name":"libcurl3-nss","binary_version":"7.58.0-2ubuntu3.24+esm3"},{"binary_name":"libcurl4","binary_version":"7.58.0-2ubuntu3.24+esm3"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2023/UBUNTU-CVE-2023-46218.json"}},{"package":{"name":"curl","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/curl@7.68.0-1ubuntu2.21?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"7.68.0-1ubuntu2.21"}]}],"versions":["7.65.3-1ubuntu3","7.65.3-1ubuntu4","7.66.0-1ubuntu1","7.67.0-2ubuntu1","7.68.0-1ubuntu1","7.68.0-1ubuntu2","7.68.0-1ubuntu2.1","7.68.0-1ubuntu2.2","7.68.0-1ubuntu2.4","7.68.0-1ubuntu2.5","7.68.0-1ubuntu2.6","7.68.0-1ubuntu2.7","7.68.0-1ubuntu2.10","7.68.0-1ubuntu2.11","7.68.0-1ubuntu2.12","7.68.0-1ubuntu2.13","7.68.0-1ubuntu2.14","7.68.0-1ubuntu2.15","7.68.0-1ubuntu2.16","7.68.0-1ubuntu2.18","7.68.0-1ubuntu2.19","7.68.0-1ubuntu2.20"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"curl","binary_version":"7.68.0-1ubuntu2.21"},{"binary_name":"libcurl3-gnutls","binary_version":"7.68.0-1ubuntu2.21"},{"binary_name":"libcurl3-nss","binary_version":"7.68.0-1ubuntu2.21"},{"binary_version":"7.68.0-1ubuntu2.21","binary_name":"libcurl4"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2023/UBUNTU-CVE-2023-46218.json"}},{"package":{"name":"curl","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/curl@7.81.0-1ubuntu1.15?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"7.81.0-1ubuntu1.15"}]}],"versions":["7.74.0-1.3ubuntu2","7.74.0-1.3ubuntu3","7.80.0-3","7.81.0-1","7.81.0-1ubuntu1.1","7.81.0-1ubuntu1.2","7.81.0-1ubuntu1.3","7.81.0-1ubuntu1.4","7.81.0-1ubuntu1.6","7.81.0-1ubuntu1.7","7.81.0-1ubuntu1.8","7.81.0-1ubuntu1.10","7.81.0-1ubuntu1.11","7.81.0-1ubuntu1.13","7.81.0-1ubuntu1.14"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"curl","binary_version":"7.81.0-1ubuntu1.15"},{"binary_name":"libcurl3-gnutls","binary_version":"7.81.0-1ubuntu1.15"},{"binary_name":"libcurl3-nss","binary_version":"7.81.0-1ubuntu1.15"},{"binary_name":"libcurl4","binary_version":"7.81.0-1ubuntu1.15"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2023/UBUNTU-CVE-2023-46218.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:L/I:L/A:N"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N"},{"type":"Ubuntu","score":"medium"}]}