{"id":"UBUNTU-CVE-2016-8858","details":"The kex_input_kexinit function in kex.c in OpenSSH 6.x and 7.x through 7.3 allows remote attackers to cause a denial of service (memory consumption) by sending many duplicate KEXINIT requests.  NOTE: a third party reports that \"OpenSSH upstream does not consider this as a security issue.\"","modified":"2025-09-08T16:43:55Z","published":"2016-12-09T11:59:00Z","upstream":["CVE-2016-8858"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2016-8858"},{"type":"REPORT","url":"http://seclists.org/oss-sec/2016/q4/185"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2016-8858"}],"affected":[{"package":{"name":"openssh","ecosystem":"Ubuntu:Pro:14.04:LTS","purl":"pkg:deb/ubuntu/openssh@1:6.6p1-2ubuntu2.13+esm2?arch=source&distro=esm-infra-legacy/trusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1:6.2p2-6","1:6.2p2-6ubuntu1","1:6.4p1-1","1:6.4p1-2","1:6.5p1-1","1:6.5p1-2","1:6.5p1-3","1:6.5p1-4","1:6.5p1-6","1:6.6p1-1","1:6.6p1-2","1:6.6p1-2ubuntu1","1:6.6p1-2ubuntu2","1:6.6p1-2ubuntu2.2","1:6.6p1-2ubuntu2.3","1:6.6p1-2ubuntu2.4","1:6.6p1-2ubuntu2.6","1:6.6p1-2ubuntu2.7","1:6.6p1-2ubuntu2.8","1:6.6p1-2ubuntu2.10","1:6.6p1-2ubuntu2.11","1:6.6p1-2ubuntu2.12","1:6.6p1-2ubuntu2.13","1:6.6p1-2ubuntu2.13+esm1","1:6.6p1-2ubuntu2.13+esm2"],"ecosystem_specific":{"binaries":[{"binary_version":"1:6.6p1-2ubuntu2.13+esm2","binary_name":"openssh-client"},{"binary_version":"1:6.6p1-2ubuntu2.13+esm2","binary_name":"openssh-server"},{"binary_version":"1:6.6p1-2ubuntu2.13+esm2","binary_name":"openssh-sftp-server"},{"binary_version":"1:6.6p1-2ubuntu2.13+esm2","binary_name":"ssh"},{"binary_version":"1:6.6p1-2ubuntu2.13+esm2","binary_name":"ssh-askpass-gnome"},{"binary_version":"1:6.6p1-2ubuntu2.13+esm2","binary_name":"ssh-krb5"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2016/UBUNTU-CVE-2016-8858.json"}},{"package":{"name":"openssh","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/openssh@1:7.2p2-4ubuntu2.10+esm7?arch=source&distro=esm-infra/xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1:6.9p1-2","1:6.9p1-3","1:7.1p1-1","1:7.1p1-3","1:7.1p1-4","1:7.1p1-6","1:7.1p2-1","1:7.1p2-2","1:7.2p1-1","1:7.2p2-1","1:7.2p2-2","1:7.2p2-3","1:7.2p2-4","1:7.2p2-4ubuntu1","1:7.2p2-4ubuntu2.1","1:7.2p2-4ubuntu2.2","1:7.2p2-4ubuntu2.4","1:7.2p2-4ubuntu2.5","1:7.2p2-4ubuntu2.6","1:7.2p2-4ubuntu2.7","1:7.2p2-4ubuntu2.8","1:7.2p2-4ubuntu2.10","1:7.2p2-4ubuntu2.10+esm1","1:7.2p2-4ubuntu2.10+esm2","1:7.2p2-4ubuntu2.10+esm3","1:7.2p2-4ubuntu2.10+esm4","1:7.2p2-4ubuntu2.10+esm5","1:7.2p2-4ubuntu2.10+esm6","1:7.2p2-4ubuntu2.10+esm7"],"ecosystem_specific":{"binaries":[{"binary_version":"1:7.2p2-4ubuntu2.10+esm7","binary_name":"openssh-client"},{"binary_version":"1:7.2p2-4ubuntu2.10+esm7","binary_name":"openssh-client-ssh1"},{"binary_version":"1:7.2p2-4ubuntu2.10+esm7","binary_name":"openssh-server"},{"binary_version":"1:7.2p2-4ubuntu2.10+esm7","binary_name":"openssh-sftp-server"},{"binary_version":"1:7.2p2-4ubuntu2.10+esm7","binary_name":"ssh"},{"binary_version":"1:7.2p2-4ubuntu2.10+esm7","binary_name":"ssh-askpass-gnome"},{"binary_version":"1:7.2p2-4ubuntu2.10+esm7","binary_name":"ssh-krb5"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2016/UBUNTU-CVE-2016-8858.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":"negligible"}]}