{"cve":"CVE-2018-1000808","nvd":{"published":"2018-10-08T15:29:00.947","modified":"2026-06-17T01:33:05.357","status":"Modified","description":"Python Cryptographic Authority pyopenssl version Before 17.5.0 contains a CWE - 401 : Failure to Release Memory Before Removing Last Reference vulnerability in PKCS #12 Store that can result in Denial of service if memory runs low or is exhausted. This attack appear to be exploitable via Depends upon calling application, however it could be as simple as initiating a TLS connection. Anything that would cause the calling application to reload certificates from a PKCS #12 store.. This vulnerability appears to have been fixed in 17.5.0.","cvss_v4":null,"cvss_v3":{"version":"3.0","vector":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","score":5.9},"cwes":["CWE-404"],"references":["http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00014.html","https://access.redhat.com/errata/RHSA-2019:0085","https://github.com/pyca/pyopenssl/pull/723","https://usn.ubuntu.com/3813-1/","http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00014.html"],"products":["canonical:ubuntu_linux","pyopenssl_project:pyopenssl","redhat:enterprise_linux_desktop","redhat:enterprise_linux_server","redhat:enterprise_linux_workstation","redhat:gluster_storage","redhat:openstack"],"source":"nvd","synced_at":"2026-10-19T20:53:14.491561039+00:00"},"epss":{"cve":"CVE-2018-1000808","score":0.01895,"percentile":0.79623,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-2rcm-phc9-3945","url":"https://osv.dev/vulnerability/GHSA-2rcm-phc9-3945","summary":"Pyopenssl Incorrect Memory Management","modified":"2024-10-21T21:26:43.686806Z","packages":[{"ecosystem":"PyPI","name":"pyopenssl","purl":"pkg:pypi/pyopenssl","ranges":["<17.5.0"],"fixed":["17.5.0"]}]},{"id":"PYSEC-2018-24","url":"https://osv.dev/vulnerability/PYSEC-2018-24","summary":"","modified":"2023-11-08T03:59:40.194341Z","packages":[{"ecosystem":"PyPI","name":"pyopenssl","purl":"pkg:pypi/pyopenssl","ranges":["<17.5.0"],"fixed":["17.5.0"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}