{"id":"UBUNTU-CVE-2018-16789","details":"libhttp/url.c in shellinabox through 2.20 has an implementation flaw in the HTTP request parsing logic. By sending a crafted multipart/form-data HTTP request, an attacker could exploit this to force shellinaboxd into an infinite loop, exhausting available CPU resources and taking the service down.","modified":"2025-10-24T04:47:12Z","published":"2019-03-21T16:00:00Z","upstream":["CVE-2018-16789"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2018-16789"},{"type":"REPORT","url":"https://github.com/shellinabox/shellinabox/pull/446"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2018-16789"}],"affected":[{"package":{"name":"shellinabox","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/shellinabox@2.19?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.17","2.18","2.19"],"ecosystem_specific":{"binaries":[{"binary_version":"2.19","binary_name":"shellinabox"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2018/UBUNTU-CVE-2018-16789.json"}},{"package":{"name":"shellinabox","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/shellinabox@2.20build1?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.20","2.20build1"],"ecosystem_specific":{"binaries":[{"binary_name":"shellinabox","binary_version":"2.20build1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2018/UBUNTU-CVE-2018-16789.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"medium"}]}