{"id":"UBUNTU-CVE-2024-53981","details":"python-multipart is a streaming multipart parser for Python. When parsing form data, python-multipart skips line breaks (CR \\r or LF \\n) in front of the first boundary and any tailing bytes after the last boundary. This happens one byte at a time and emits a log event each time, which may cause excessive logging for certain inputs. An attacker could abuse this by sending a malicious request with lots of data before the first or after the last boundary, causing high CPU load and stalling the processing thread for a significant amount of time. In case of ASGI application, this could stall the event loop and prevent other requests from being processed, resulting in a denial of service (DoS). This vulnerability is fixed in 0.0.18.","modified":"2026-02-12T14:43:52.262476Z","published":"2024-12-02T16:15:00Z","related":["USN-8027-1"],"upstream":["CVE-2024-53981"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2024-53981"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2024-53981"},{"type":"REPORT","url":"https://github.com/Kludex/python-multipart/security/advisories/GHSA-59g5-xgcq-4qw3"},{"type":"REPORT","url":"https://github.com/Kludex/python-multipart/commit/c4fe4d3cebc08c660e57dd709af1ffa7059b3177"},{"type":"REPORT","url":"https://github.com/Kludex/python-multipart/commit/c4fe4d3cebc08c660e57dd709af1ffa7059b3177"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-8027-1"}],"affected":[{"package":{"name":"python-multipart","ecosystem":"Ubuntu:Pro:22.04:LTS","purl":"pkg:deb/ubuntu/python-multipart@0.0.5-2ubuntu0.1~esm1?arch=source&distro=esm-apps/jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.0.5-2ubuntu0.1~esm1"}]}],"versions":["0.0.5-2"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro","binaries":[{"binary_version":"0.0.5-2ubuntu0.1~esm1","binary_name":"python3-multipart"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2024/UBUNTU-CVE-2024-53981.json"}},{"package":{"name":"python-multipart","ecosystem":"Ubuntu:Pro:24.04:LTS","purl":"pkg:deb/ubuntu/python-multipart@0.0.9-1ubuntu0.1~esm1?arch=source&distro=esm-apps/noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.0.9-1ubuntu0.1~esm1"}]}],"versions":["0.0.5-3","0.0.6-1","0.0.9-1"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro","binaries":[{"binary_name":"python3-multipart","binary_version":"0.0.9-1ubuntu0.1~esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2024/UBUNTU-CVE-2024-53981.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":"Ubuntu","score":"medium"}]}