{"id":"UBUNTU-CVE-2024-6387","details":"A security regression (CVE-2006-5051) was discovered in OpenSSH's server (sshd). There is a race condition which can lead sshd to handle some signals in an unsafe manner. An unauthenticated, remote attacker may be able to trigger it by failing to authenticate within a set time period.","modified":"2026-02-04T04:18:00.629884Z","published":"2024-07-01T00:00:00Z","related":["USN-6859-1"],"upstream":["CVE-2024-6387"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2024-6387"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2024-6387"},{"type":"REPORT","url":"https://www.qualys.com/2024/07/01/cve-2024-6387/regresshion.txt"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-6859-1"},{"type":"REPORT","url":"https://ubuntu.com/blog/ubuntu-regresshion-security-fix"}],"affected":[{"package":{"name":"openssh","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/openssh@1:8.9p1-3ubuntu0.10?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:8.9p1-3ubuntu0.10"}]}],"versions":["1:8.4p1-6ubuntu2","1:8.7p1-2","1:8.7p1-2build1","1:8.7p1-4","1:8.8p1-1","1:8.9p1-3","1:8.9p1-3ubuntu0.1","1:8.9p1-3ubuntu0.3","1:8.9p1-3ubuntu0.4","1:8.9p1-3ubuntu0.5","1:8.9p1-3ubuntu0.6","1:8.9p1-3ubuntu0.7"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"openssh-client","binary_version":"1:8.9p1-3ubuntu0.10"},{"binary_name":"openssh-server","binary_version":"1:8.9p1-3ubuntu0.10"},{"binary_version":"1:8.9p1-3ubuntu0.10","binary_name":"openssh-sftp-server"},{"binary_name":"openssh-tests","binary_version":"1:8.9p1-3ubuntu0.10"},{"binary_name":"ssh","binary_version":"1:8.9p1-3ubuntu0.10"},{"binary_name":"ssh-askpass-gnome","binary_version":"1:8.9p1-3ubuntu0.10"}],"priority_reason":"Potential remote code execution"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2024/UBUNTU-CVE-2024-6387.json"}},{"package":{"name":"openssh","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/openssh@1:9.6p1-3ubuntu13.3?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:9.6p1-3ubuntu13.3"}]}],"versions":["1:9.3p1-1ubuntu3","1:9.4p1-1ubuntu1","1:9.6p1-3ubuntu1","1:9.6p1-3ubuntu2","1:9.6p1-3ubuntu11","1:9.6p1-3ubuntu12","1:9.6p1-3ubuntu13"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"openssh-client","binary_version":"1:9.6p1-3ubuntu13.3"},{"binary_name":"openssh-server","binary_version":"1:9.6p1-3ubuntu13.3"},{"binary_name":"openssh-sftp-server","binary_version":"1:9.6p1-3ubuntu13.3"},{"binary_name":"openssh-tests","binary_version":"1:9.6p1-3ubuntu13.3"},{"binary_name":"ssh","binary_version":"1:9.6p1-3ubuntu13.3"},{"binary_version":"1:9.6p1-3ubuntu13.3","binary_name":"ssh-askpass-gnome"}],"priority_reason":"Potential remote code execution"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2024/UBUNTU-CVE-2024-6387.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H"},{"type":"Ubuntu","score":"high"}]}