{"schemaVersion":3,"id":"CVE-2018-1000807","aliases":["ALPINE-CVE-2018-1000807","SUSE-SU-2024:3749-1","GHSA-p28m-34f6-967q","PYSEC-2018-23","UBUNTU-CVE-2018-1000807","DEBIAN-CVE-2018-1000807"],"status":"published","duplicateOf":null,"title":null,"description":"Python Cryptographic Authority pyopenssl version prior to version 17.5.0 contains a CWE-416: Use After Free vulnerability in X509 object handling that can result in Use after free can lead to possible denial of service or remote code execution.. This attack appear to be exploitable via Depends on the calling application and if it retains a reference to the memory.. This vulnerability appears to have been fixed in 17.5.0.","dates":{"published":"2018-10-08T00:00:00.000Z","modified":"2024-08-05T12:47:56.674Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":8.1,"severity":"high","version":"3.1","versionLabel":"v3.1","source":"NVD","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":8.1,"severity":"high","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","exploitability":null,"impact":null,"computed":false},{"version":"2.0","versionLabel":"v2.0","source":"NVD","score":6.8,"severity":"medium","vector":"AV:N/AC:M/Au:N/C:P/I:P/A:P","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"OSV · Alpine","score":8.1,"severity":"high","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","exploitability":5.6,"impact":9.8,"computed":true},{"version":"3.1","versionLabel":"v3.1","source":"OSV · Pypi","score":8.1,"severity":"high","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","exploitability":5.6,"impact":9.8,"computed":true},{"version":"3.1","versionLabel":"v3.1","source":"OSV · Ubuntu","score":8.1,"severity":"high","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","exploitability":5.6,"impact":9.8,"computed":true},{"version":"3.1","versionLabel":"v3.1","source":"OSV · Debian","score":8.1,"severity":"high","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","exploitability":5.6,"impact":9.8,"computed":true}]},"epss":{"probability":0.04075,"percentile":0.90583,"severity":"low","asOf":"2026-10-19T00:00:00.000Z","change":{"pp":0,"baselineDate":"2026-09-19T00:00:00.000Z","baselineScore":0.04075},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.04075,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.04075,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.04075,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.04075,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.04075,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.04075,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.04075,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.04075,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.04075,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.04075,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.04075,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.04075,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.04075,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.04075,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.04075,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.04075,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.04075,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.04075,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.04075,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.04075,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.04075,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.04075,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.04075,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.04075,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.04075,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.04075,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.04075,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.04075,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.04075,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.04075,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.04075,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.04075,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.04075,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.04075,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.04075,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.04075,"percentile":0.90583}],"last30":[{"date":"2026-09-19T00:00:00.000Z","score":0.04075,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.04075,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.04075,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.04075,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.04075,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.04075,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.04075,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.04075,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.04075,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.04075,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.04075,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.04075,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.04075,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.04075,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.04075,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.04075,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.04075,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.04075,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.04075,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.04075,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.04075,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.04075,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.04075,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.04075,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.04075,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.04075,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.04075,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.04075,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.04075,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.04075,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.04075,"percentile":0.90583}]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[],"exploitCount":0,"weaknesses":[{"id":"CWE-416","name":"Use After Free","description":"The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory \"belongs\" to the code that operates on the new pointer.","type":"weakness","status":"Stable","abstraction":"Variant","likelihoodOfExploit":"High","url":"https://cwe.mitre.org/data/definitions/416.html"}],"affected":[{"vendor":"alpine","product":"py-openssl","name":"py-openssl","label":"py-openssl","ecosystem":"Alpine Linux","cpePart":null,"purl":"pkg:apk/alpine/py-openssl","purlType":"apk","versions":[{"text":"< 17.5.0-r0","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 17.5.0-r0","eol":null,"hubHref":null},{"vendor":"canonical","product":"ubuntu_linux","name":"ubuntu linux","label":"ubuntu_linux","ecosystem":null,"cpePart":"o","purl":null,"purlType":null,"versions":[{"text":"16.04","noFixRecorded":false,"fixedIn":null}],"versionsText":"16.04","eol":{"isEol":true,"eolDate":"2021-04-02T00:00:00.000Z","matchMethod":"cpe","cycle":{"name":"16.04","label":"16.04 'Xenial Xerus' (LTS)","eolFrom":"2021-04-02T00:00:00.000Z","isLts":true,"isMaintained":false,"latestVersion":"16.04.7"},"product":{"name":"ubuntu","label":"Ubuntu","category":"os"}},"hubHref":"/vendor/canonical/ubuntu_linux"},{"vendor":"debian","product":"pyopenssl","name":"pyopenssl","label":"pyopenssl","ecosystem":"Debian","cpePart":null,"purl":"pkg:deb/debian/pyopenssl","purlType":"deb","versions":[{"text":"< 17.5.0-1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 17.5.0-1","eol":null,"hubHref":null},{"vendor":"ubuntu","product":"pyopenssl","name":"pyopenssl","label":"pyopenssl","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/pyopenssl","purlType":"deb","versions":[{"text":"< 0.15.1-2ubuntu0.2","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 0.15.1-2ubuntu0.2","eol":null,"hubHref":null},{"vendor":"pyopenssl","product":"pyopenssl","name":"pyopenssl","label":"pyopenssl","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"< 17.5.0","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 17.5.0","eol":null,"hubHref":"/vendor/pyopenssl/pyopenssl"},{"vendor":"PyPI","product":"pyopenssl","name":"pyopenssl","label":"pyopenssl","ecosystem":"PyPI","cpePart":null,"purl":"pkg:pypi/pyopenssl","purlType":"pypi","versions":[{"text":"< 17.5.0","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 17.5.0","eol":null,"hubHref":null},{"vendor":"redhat","product":"enterprise_linux_desktop","name":"enterprise linux desktop","label":"enterprise_linux_desktop","ecosystem":null,"cpePart":"o","purl":null,"purlType":null,"versions":[{"text":"7.0","noFixRecorded":false,"fixedIn":null}],"versionsText":"7.0","eol":null,"hubHref":"/vendor/redhat/enterprise_linux_desktop"},{"vendor":"redhat","product":"enterprise_linux_server","name":"enterprise linux server","label":"enterprise_linux_server","ecosystem":null,"cpePart":"o","purl":null,"purlType":null,"versions":[{"text":"7.0","noFixRecorded":false,"fixedIn":null}],"versionsText":"7.0","eol":null,"hubHref":"/vendor/redhat/enterprise_linux_server"},{"vendor":"redhat","product":"enterprise_linux_workstation","name":"enterprise linux workstation","label":"enterprise_linux_workstation","ecosystem":null,"cpePart":"o","purl":null,"purlType":null,"versions":[{"text":"7.0","noFixRecorded":false,"fixedIn":null}],"versionsText":"7.0","eol":null,"hubHref":"/vendor/redhat/enterprise_linux_workstation"},{"vendor":"redhat","product":"openstack","name":"openstack","label":"openstack","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"13","noFixRecorded":false,"fixedIn":null}],"versionsText":"13","eol":null,"hubHref":"/vendor/redhat/openstack"},{"vendor":"suse","product":"python-pyOpenSSL&distro=SUSE Linux Enterprise Server 12 SP5-LTSS","name":"python-pyOpenSSL","label":"python-pyOpenSSL&distro=SUSE Linux Enterprise Server 12 SP5-LTSS","ecosystem":"SUSE Linux Enterprise","cpePart":null,"purl":"pkg:rpm/suse/python-pyOpenSSL&distro=SUSE Linux Enterprise Server 12 SP5-LTSS","purlType":"rpm","versions":[{"text":"< 17.1.0-4.29.1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 17.1.0-4.29.1","eol":null,"hubHref":null},{"vendor":"suse","product":"python-pyOpenSSL&distro=SUSE Linux Enterprise Server for SAP Applications 12 SP5","name":"python-pyOpenSSL","label":"python-pyOpenSSL&distro=SUSE Linux Enterprise Server for SAP Applications 12 SP5","ecosystem":"SUSE Linux Enterprise","cpePart":null,"purl":"pkg:rpm/suse/python-pyOpenSSL&distro=SUSE Linux Enterprise Server for SAP Applications 12 SP5","purlType":"rpm","versions":[{"text":"< 17.1.0-4.29.1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 17.1.0-4.29.1","eol":null,"hubHref":null},{"vendor":"suse","product":"python-pyOpenSSL&distro=SUSE Linux Enterprise Server LTSS Extended Security 12 SP5","name":"python-pyOpenSSL","label":"python-pyOpenSSL&distro=SUSE Linux Enterprise Server LTSS Extended Security 12 SP5","ecosystem":"SUSE Linux Enterprise","cpePart":null,"purl":"pkg:rpm/suse/python-pyOpenSSL&distro=SUSE Linux Enterprise Server LTSS Extended Security 12 SP5","purlType":"rpm","versions":[{"text":"< 17.1.0-4.29.1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 17.1.0-4.29.1","eol":null,"hubHref":null}],"affectedCount":13,"eol":{"hasEol":true,"count":1},"references":[{"url":"https://github.com/pyca/pyopenssl/pull/723","label":"github.com/pyca/pyopenssl/pull/723","hostname":"github.com","tags":["Patch","Third Party Advisory","WEB"]},{"url":"https://access.redhat.com/errata/RHSA-2019:0085","label":"access.redhat.com/errata/RHSA-2019:0085","hostname":"access.redhat.com","tags":["Vendor Advisory","Third Party Advisory","WEB","Advisory"]},{"url":"https://usn.ubuntu.com/3813-1/","label":"usn.ubuntu.com/3813-1/","hostname":"usn.ubuntu.com","tags":["Vendor Advisory","Third Party Advisory","WEB"]},{"url":"http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00014.html","label":"lists.opensuse.org/opensuse-security-announce/2019-04/msg00014.html","hostname":"lists.opensuse.org","tags":["Vendor Advisory","Mailing List","Third Party Advisory","WEB"]},{"url":"https://github.com/pyca/pyopenssl/commit/e73818600065821d588af475b024f4eb518c3509","label":"github.com/pyca/pyopenssl/commit/e73818600065821d588af475b024f4eb518c3509","hostname":"github.com","tags":["WEB"]},{"url":"https://security.alpinelinux.org/vuln/CVE-2018-1000807","label":"security.alpinelinux.org/vuln/CVE-2018-1000807","hostname":"security.alpinelinux.org","tags":["Advisory"]},{"url":"https://www.suse.com/support/update/announcement/2024/suse-su-20243749-1/","label":"www.suse.com/support/update/announcement/2024/suse-su-20243749-1/","hostname":"www.suse.com","tags":["Advisory"]},{"url":"https://bugzilla.suse.com/1231700","label":"bugzilla.suse.com/1231700","hostname":"bugzilla.suse.com","tags":["REPORT"]},{"url":"https://www.suse.com/security/cve/CVE-2018-1000807","label":"www.suse.com/security/cve/CVE-2018-1000807","hostname":"www.suse.com","tags":["WEB"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2018-1000807","label":"nvd.nist.gov/vuln/detail/CVE-2018-1000807","hostname":"nvd.nist.gov","tags":["Advisory"]},{"url":"https://github.com/pyca/pyopenssl","label":"github.com/pyca/pyopenssl","hostname":"github.com","tags":["PACKAGE"]},{"url":"https://github.com/pypa/advisory-database/tree/main/vulns/pyopenssl/PYSEC-2018-23.yaml","label":"github.com/pypa/advisory-database/tree/main/vulns/pyopenssl/PYSEC-2018-23.yaml","hostname":"github.com","tags":["WEB"]},{"url":"https://usn.ubuntu.com/3813-1","label":"usn.ubuntu.com/3813-1","hostname":"usn.ubuntu.com","tags":["WEB"]},{"url":"https://github.com/advisories/GHSA-p28m-34f6-967q","label":"github.com/advisories/GHSA-p28m-34f6-967q","hostname":"github.com","tags":["Advisory"]},{"url":"https://ubuntu.com/security/CVE-2018-1000807","label":"ubuntu.com/security/CVE-2018-1000807","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/notices/USN-3813-1","label":"ubuntu.com/security/notices/USN-3813-1","hostname":"ubuntu.com","tags":["Advisory"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2018-1000807","label":"www.cve.org/CVERecord?id=CVE-2018-1000807","hostname":"www.cve.org","tags":["REPORT"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2018-1000807","label":"security-tracker.debian.org/tracker/CVE-2018-1000807","hostname":"security-tracker.debian.org","tags":["Advisory"]}],"lineage":{"upstream":[],"downstream":["RHSA-2019:0085","SUSE-RU-2019:1161-1","SUSE-SU-2018:4063-1","SUSE-SU-2024:1626-1","USN-3813-1"],"duplicates":[],"related":["SUSE-RU-2019:1161-1","SUSE-SU-2018:4063-1","SUSE-SU-2024:1626-1","USN-3813-1"]},"timeline":[{"kind":"published","date":"2018-10-08T00:00:00.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2024-08-05T12:47:56.674Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":33,"level":"medium","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-20T06:21:55.557Z","stale":false,"partial":false}}