{"id":"UBUNTU-CVE-2023-0464","details":"A security vulnerability has been identified in all supported versions of OpenSSL related to the verification of X.509 certificate chains that include policy constraints.  Attackers may be able to exploit this vulnerability by creating a malicious certificate chain that triggers exponential use of computational resources, leading to a denial-of-service (DoS) attack on affected systems. Policy processing is disabled by default but can be enabled by passing the `-policy' argument to the command line utilities or by calling the `X509_VERIFY_PARAM_set1_policies()' function.","modified":"2026-02-04T04:39:46.562817Z","published":"2023-03-22T17:15:00Z","related":["USN-6039-1","USN-7894-1"],"upstream":["CVE-2023-0464"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2023-0464"},{"type":"REPORT","url":"https://www.openssl.org/news/secadv/20230322.txt"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-6039-1"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2023-0464"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-7894-1"}],"affected":[{"package":{"name":"openssl","ecosystem":"Ubuntu:Pro:14.04:LTS","purl":"pkg:deb/ubuntu/openssl@1.0.1f-1ubuntu2.27+esm7?arch=source&distro=trusty/esm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.0.1f-1ubuntu2.27+esm7"}]}],"versions":["1.0.1e-3ubuntu1","1.0.1e-4ubuntu1","1.0.1e-4ubuntu2","1.0.1e-4ubuntu3","1.0.1e-4ubuntu4","1.0.1f-1ubuntu1","1.0.1f-1ubuntu2","1.0.1f-1ubuntu2.1","1.0.1f-1ubuntu2.2","1.0.1f-1ubuntu2.3","1.0.1f-1ubuntu2.4","1.0.1f-1ubuntu2.5","1.0.1f-1ubuntu2.7","1.0.1f-1ubuntu2.8","1.0.1f-1ubuntu2.11","1.0.1f-1ubuntu2.12","1.0.1f-1ubuntu2.15","1.0.1f-1ubuntu2.16","1.0.1f-1ubuntu2.17","1.0.1f-1ubuntu2.18","1.0.1f-1ubuntu2.19","1.0.1f-1ubuntu2.20","1.0.1f-1ubuntu2.21","1.0.1f-1ubuntu2.22","1.0.1f-1ubuntu2.23","1.0.1f-1ubuntu2.24","1.0.1f-1ubuntu2.25","1.0.1f-1ubuntu2.26","1.0.1f-1ubuntu2.27","1.0.1f-1ubuntu2.27+esm1","1.0.1f-1ubuntu2.27+esm2","1.0.1f-1ubuntu2.27+esm3","1.0.1f-1ubuntu2.27+esm4","1.0.1f-1ubuntu2.27+esm5","1.0.1f-1ubuntu2.27+esm6"],"ecosystem_specific":{"binaries":[{"binary_name":"libssl-dev","binary_version":"1.0.1f-1ubuntu2.27+esm7"},{"binary_name":"libssl1.0.0","binary_version":"1.0.1f-1ubuntu2.27+esm7"},{"binary_name":"openssl","binary_version":"1.0.1f-1ubuntu2.27+esm7"}],"availability":"Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2023/UBUNTU-CVE-2023-0464.json"}},{"package":{"name":"openssl","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/openssl@1.0.2g-1ubuntu4.20+esm7?arch=source&distro=esm-infra/xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.0.2g-1ubuntu4.20+esm7"}]}],"versions":["1.0.2d-0ubuntu1","1.0.2d-0ubuntu2","1.0.2e-1ubuntu1","1.0.2f-2ubuntu1","1.0.2g-1ubuntu2","1.0.2g-1ubuntu3","1.0.2g-1ubuntu4","1.0.2g-1ubuntu4.1","1.0.2g-1ubuntu4.2","1.0.2g-1ubuntu4.4","1.0.2g-1ubuntu4.5","1.0.2g-1ubuntu4.6","1.0.2g-1ubuntu4.8","1.0.2g-1ubuntu4.9","1.0.2g-1ubuntu4.10","1.0.2g-1ubuntu4.11","1.0.2g-1ubuntu4.12","1.0.2g-1ubuntu4.13","1.0.2g-1ubuntu4.14","1.0.2g-1ubuntu4.15","1.0.2g-1ubuntu4.16","1.0.2g-1ubuntu4.17","1.0.2g-1ubuntu4.18","1.0.2g-1ubuntu4.19","1.0.2g-1ubuntu4.20","1.0.2g-1ubuntu4.20+esm1","1.0.2g-1ubuntu4.20+esm2","1.0.2g-1ubuntu4.20+esm3","1.0.2g-1ubuntu4.20+esm4","1.0.2g-1ubuntu4.20+esm5","1.0.2g-1ubuntu4.20+esm6"],"ecosystem_specific":{"binaries":[{"binary_name":"libssl-dev","binary_version":"1.0.2g-1ubuntu4.20+esm7"},{"binary_name":"libssl1.0.0","binary_version":"1.0.2g-1ubuntu4.20+esm7"},{"binary_name":"openssl","binary_version":"1.0.2g-1ubuntu4.20+esm7"}],"availability":"Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2023/UBUNTU-CVE-2023-0464.json"}},{"package":{"name":"edk2","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/edk2@0~20160408.ffea0a2c-2ubuntu0.2+esm3?arch=source&distro=esm-apps/xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0~20150106.5c2d456b-2","0~20160104.c2a892d7-1","0~20160408.ffea0a2c-2","0~20160408.ffea0a2c-2ubuntu0.1","0~20160408.ffea0a2c-2ubuntu0.2","0~20160408.ffea0a2c-2ubuntu0.2+esm1","0~20160408.ffea0a2c-2ubuntu0.2+esm3"],"ecosystem_specific":{"binaries":[{"binary_name":"ovmf","binary_version":"0~20160408.ffea0a2c-2ubuntu0.2+esm3"},{"binary_name":"qemu-efi","binary_version":"0~20160408.ffea0a2c-2ubuntu0.2+esm3"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2023/UBUNTU-CVE-2023-0464.json"}},{"package":{"name":"openssl","ecosystem":"Ubuntu:Pro:FIPS:16.04:LTS","purl":"pkg:deb/ubuntu/openssl@1.0.2g-1ubuntu4.fips.4.20.7?arch=source&distro=fips-updates/xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.0.2g-1ubuntu4.fips.4.20.7"}]}],"versions":["1.0.2g-1ubuntu4.fips.4.9.1","1.0.2g-1ubuntu4.fips.4.13.1","1.0.2g-1ubuntu4.fips.4.15.1","1.0.2g-1ubuntu4.fips.4.16.1","1.0.2g-1ubuntu4.fips.4.17.1","1.0.2g-1ubuntu4.fips.4.18.1","1.0.2g-1ubuntu4.fips.4.19.3","1.0.2g-1ubuntu4.fips.4.20.1","1.0.2g-1ubuntu4.fips.4.20.2","1.0.2g-1ubuntu4.fips.4.20.3","1.0.2g-1ubuntu4.fips.4.20.6"],"ecosystem_specific":{"binaries":[{"binary_name":"libssl-dev","binary_version":"1.0.2g-1ubuntu4.fips.4.20.7"},{"binary_name":"libssl1.0.0","binary_version":"1.0.2g-1ubuntu4.fips.4.20.7"},{"binary_name":"libssl1.0.0-hmac","binary_version":"1.0.2g-1ubuntu4.fips.4.20.7"},{"binary_name":"openssl","binary_version":"1.0.2g-1ubuntu4.fips.4.20.7"}],"availability":"Available with Ubuntu Pro: 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with Ubuntu Pro: 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subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2023/UBUNTU-CVE-2023-0464.json"}},{"package":{"name":"openssl","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/openssl@3.0.2-0ubuntu1.9?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.0.2-0ubuntu1.9"}]}],"versions":["1.1.1l-1ubuntu1","3.0.0-1ubuntu1","3.0.1-0ubuntu1","3.0.2-0ubuntu1","3.0.2-0ubuntu1.1","3.0.2-0ubuntu1.2","3.0.2-0ubuntu1.4","3.0.2-0ubuntu1.5","3.0.2-0ubuntu1.6","3.0.2-0ubuntu1.7","3.0.2-0ubuntu1.8"],"ecosystem_specific":{"binaries":[{"binary_name":"libssl-dev","binary_version":"3.0.2-0ubuntu1.9"},{"binary_name":"libssl3","binary_version":"3.0.2-0ubuntu1.9"},{"binary_name":"openssl","binary_version":"3.0.2-0ubuntu1.9"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2023/UBUNTU-CVE-2023-0464.json"}},{"package":{"name":"nodejs","ecosystem":"Ubuntu:Pro:22.04:LTS","purl":"pkg:deb/ubuntu/nodejs@12.22.9~dfsg-1ubuntu3.6+esm2?arch=source&distro=esm-apps/jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["12.22.5~dfsg-5ubuntu1","12.22.7~dfsg-2ubuntu1","12.22.7~dfsg-2ubuntu3","12.22.9~dfsg-1ubuntu2","12.22.9~dfsg-1ubuntu3","12.22.9~dfsg-1ubuntu3.1","12.22.9~dfsg-1ubuntu3.2","12.22.9~dfsg-1ubuntu3.3","12.22.9~dfsg-1ubuntu3.4","12.22.9~dfsg-1ubuntu3.5","12.22.9~dfsg-1ubuntu3.6","12.22.9~dfsg-1ubuntu3.6+esm2"],"ecosystem_specific":{"binaries":[{"binary_name":"libnode-dev","binary_version":"12.22.9~dfsg-1ubuntu3.6+esm2"},{"binary_name":"libnode72","binary_version":"12.22.9~dfsg-1ubuntu3.6+esm2"},{"binary_name":"nodejs","binary_version":"12.22.9~dfsg-1ubuntu3.6+esm2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2023/UBUNTU-CVE-2023-0464.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"low"}]}