OpenSSH is vulnerable to information disclosure attacks. The system responds differently to valid and invalid authentication attempts. A remote user could send specially crafted requests to determine valid usernames on the target system which may lead to disclosure of system information.
www.openwall.com/lists/oss-security/2018/08/15/5
www.securityfocus.com/bid/105140
www.securitytracker.com/id/1041487
access.redhat.com/errata/RHSA-2019:0711
access.redhat.com/errata/RHSA-2019:2143
access.redhat.com/security/updates/classification/#low
bugs.debian.org/906236
cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf
github.com/openbsd/src/commit/779974d35b4859c07bc3cb8a12c74b43b0a7d1e0
lists.debian.org/debian-lts-announce/2018/08/msg00022.html
psirt.global.sonicwall.com/vuln-detail/SNWLID-2018-0011
security.gentoo.org/glsa/201810-03
security.netapp.com/advisory/ntap-20181101-0001/
usn.ubuntu.com/3809-1/
www.debian.org/security/2018/dsa-4280
www.exploit-db.com/exploits/45210/
www.exploit-db.com/exploits/45233/
www.exploit-db.com/exploits/45939/
www.oracle.com/security-alerts/cpujan2020.html