{"id":"UBUNTU-CVE-2023-27371","details":"GNU libmicrohttpd before 0.9.76 allows remote DoS (Denial of Service) due to improper parsing of a multipart/form-data boundary in the postprocessor.c MHD_create_post_processor() method. This allows an attacker to remotely send a malicious HTTP POST packet that includes one or more '\\0' bytes in a multipart/form-data boundary field, which - assuming a specific heap layout - will result in an out-of-bounds read and a crash in the find_boundary() function.","modified":"2026-04-22T14:04:04.473281Z","published":"2023-02-28T20:15:00Z","upstream":["CVE-2023-27371"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2023-27371"},{"type":"REPORT","url":"https://git.gnunet.org/libmicrohttpd.git/commit/?id=e0754d1638c602382384f1eface30854b1defeec"},{"type":"REPORT","url":"https://lists.gnu.org/archive/html/libmicrohttpd/2023-02/msg00000.html"},{"type":"REPORT","url":"https://github.com/0xhebi/CVEs/tree/main/GNU%20Libmicrohttpd"},{"type":"REPORT","url":"https://git.gnunet.org/libmicrohttpd.git/commit/?id=6d6846e20bfdf4b3eb1b592c97520a532f724238"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2023-27371"}],"affected":[{"package":{"name":"libmicrohttpd","ecosystem":"Ubuntu:14.04:LTS","purl":"pkg:deb/ubuntu/libmicrohttpd@0.9.33-1?arch=source&distro=trusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.9.27-2","0.9.32-1","0.9.33-1"],"ecosystem_specific":{"binaries":[{"binary_name":"libmicrohttpd10","binary_version":"0.9.33-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2023/UBUNTU-CVE-2023-27371.json"}},{"package":{"name":"libmicrohttpd","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/libmicrohttpd@0.9.44+dfsg-1ubuntu2?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.9.37+dfsg-1ubuntu1","0.9.42+dfsg-2","0.9.44+dfsg-1","0.9.44+dfsg-1ubuntu1","0.9.44+dfsg-1ubuntu2"],"ecosystem_specific":{"binaries":[{"binary_name":"libmicrohttpd10","binary_version":"0.9.44+dfsg-1ubuntu2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2023/UBUNTU-CVE-2023-27371.json"}},{"package":{"name":"libmicrohttpd","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/libmicrohttpd@0.9.59-1?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.9.55-1","0.9.57-1","0.9.58-1","0.9.59-1"],"ecosystem_specific":{"binaries":[{"binary_name":"libmicrohttpd12","binary_version":"0.9.59-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2023/UBUNTU-CVE-2023-27371.json"}},{"package":{"name":"libmicrohttpd","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/libmicrohttpd@0.9.66-1?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.9.66-1"],"ecosystem_specific":{"binaries":[{"binary_name":"libmicrohttpd12","binary_version":"0.9.66-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2023/UBUNTU-CVE-2023-27371.json"}},{"package":{"name":"libmicrohttpd","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/libmicrohttpd@0.9.75-3ubuntu1?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.9.72-2","0.9.73-4","0.9.75-1","0.9.75-3","0.9.75-3ubuntu1"],"ecosystem_specific":{"binaries":[{"binary_version":"0.9.75-3ubuntu1","binary_name":"libmicrohttpd12"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2023/UBUNTU-CVE-2023-27371.json"}},{"package":{"name":"libmicrohttpd","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/libmicrohttpd@1.0.0-2.1ubuntu2?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.9.75-6ubuntu1","1.0.0-2ubuntu1","1.0.0-2.1ubuntu1","1.0.0-2.1ubuntu2"],"ecosystem_specific":{"binaries":[{"binary_name":"libmicrohttpd12t64","binary_version":"1.0.0-2.1ubuntu2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2023/UBUNTU-CVE-2023-27371.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/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"}]}