{"id":"UBUNTU-CVE-2023-49083","details":"cryptography is a package designed to expose cryptographic primitives and recipes to Python developers. Calling `load_pem_pkcs7_certificates` or `load_der_pkcs7_certificates` could lead to a NULL-pointer dereference and segfault. Exploitation of this vulnerability poses a serious risk of Denial of Service (DoS) for any application attempting to deserialize a PKCS7 blob/certificate. The consequences extend to potential disruptions in system availability and stability. This vulnerability has been patched in version 41.0.6.","modified":"2026-01-30T02:00:25.952766Z","published":"2023-12-04T00:00:00Z","related":["USN-6539-1"],"upstream":["CVE-2023-49083"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2023-49083"},{"type":"REPORT","url":"https://github.com/pyca/cryptography/security/advisories/GHSA-jfhm-5ghh-2f97"},{"type":"REPORT","url":"http://www.openwall.com/lists/oss-security/2023/11/29/2"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-6539-1"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2023-49083"}],"affected":[{"package":{"name":"python-cryptography","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/python-cryptography@3.4.8-1ubuntu2.1?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.4.8-1ubuntu2.1"}]}],"versions":["3.3.2-1","3.3.2-1build1","3.4.8-1","3.4.8-1ubuntu1","3.4.8-1ubuntu2"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"python3-cryptography","binary_version":"3.4.8-1ubuntu2.1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2023/UBUNTU-CVE-2023-49083.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:H/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"medium"}]}