{"id":"USN-6539-1","summary":"python-cryptography vulnerabilities","details":"It was discovered that the python-cryptography Cipher.update_into function\nwould incorrectly accept objects with immutable buffers. This would result\nin corrupted output, contrary to expectations. This issue only affected\nUbuntu 20.04 LTS, Ubuntu 22.04 LTS, and Ubuntu 23.04. (CVE-2023-23931)\n\nIt was dicovered that python-cryptography incorrectly handled loading\ncertain PKCS7 certificates. A remote attacker could possibly use this\nissue to cause python-cryptography to crash, resulting in a denial of\nservice. This issue only affected Ubuntu 22.04 LTS, Ubuntu 23.04, and\nUbuntu 23.10. (CVE-2023-49083)\n","modified":"2026-02-10T04:43:27Z","published":"2023-12-06T15:22:41Z","related":["UBUNTU-CVE-2023-23931","UBUNTU-CVE-2023-49083"],"upstream":["CVE-2023-23931","CVE-2023-49083","UBUNTU-CVE-2023-23931","UBUNTU-CVE-2023-49083"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-6539-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2023-23931"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2023-49083"}],"affected":[{"package":{"name":"python-cryptography","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/python-cryptography@2.8-3ubuntu0.2?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.8-3ubuntu0.2"}]}],"versions":["2.6.1-3.1","2.6.1-4","2.6.1-4ubuntu1","2.8-1ubuntu2","2.8-2","2.8-3","2.8-3ubuntu0.1"],"ecosystem_specific":{"binaries":[{"binary_name":"python-cryptography","binary_version":"2.8-3ubuntu0.2"},{"binary_name":"python3-cryptography","binary_version":"2.8-3ubuntu0.2"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-6539-1.json","cves_map":{"ecosystem":"Ubuntu:20.04:LTS","cves":[{"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L"},{"type":"Ubuntu","score":"low"}],"id":"CVE-2023-23931"}]}}},{"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":{"binaries":[{"binary_name":"python3-cryptography","binary_version":"3.4.8-1ubuntu2.1"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-6539-1.json","cves_map":{"ecosystem":"Ubuntu:22.04:LTS","cves":[{"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L"},{"type":"Ubuntu","score":"low"}],"id":"CVE-2023-23931"},{"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"}],"id":"CVE-2023-49083"}]}}}],"schema_version":"1.7.3"}