openSSH is vulnerable to information disclosure. An attacker is able to conduct a man-in-the-middle attack to initial connections attempts due to a observable discrepancy in the algorithm negotiation.
www.openwall.com/lists/oss-security/2020/12/02/1
anongit.mindrot.org/openssh.git/commit/?id=b3855ff053f5078ec3d3c653cdaedefaa5fc362d
docs.ssh-mitm.at/CVE-2020-14145.html
github.com/openssh/openssh-portable/compare/V_8_3_P1...V_8_4_P1
github.com/ssh-mitm/ssh-mitm/blob/master/ssh_proxy_server/plugins/session/cve202014145.py
secdb.alpinelinux.org/v3.12/main.yaml
security.gentoo.org/glsa/202105-35
security.netapp.com/advisory/ntap-20200709-0004/
www.fzi.de/en/news/news/detail-en/artikel/fsa-2020-2-ausnutzung-eines-informationslecks-fuer-gezielte-mitm-angriffe-auf-ssh-clients/