CVE-2020-14145

NameCVE-2020-14145
DescriptionThe client side in OpenSSH 5.7 through 8.3 has an Observable Discrepancy leading to an information leak in the algorithm negotiation. This allows man-in-the-middle attackers to target initial connection attempts (where no host key for the server has been cached by the client).
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)
NVD severitymedium

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
openssh (PTS)stretch1:7.4p1-10+deb9u7vulnerable
stretch (security)1:7.4p1-10+deb9u6vulnerable
buster1:7.9p1-10+deb10u2vulnerable
buster (security)1:7.9p1-10+deb10u1vulnerable
bullseye, sid1:8.3p1-1vulnerable

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
opensshsource(unstable)(unfixed)unimportant

Notes

https://www.fzi.de/en/news/news/detail-en/artikel/fsa-2020-2-ausnutzung-eines-informationslecks-fuer-gezielte-mitm-angriffe-auf-ssh-clients/
https://www.fzi.de/fileadmin/user_upload/2020-06-26-FSA-2020-2.pdf
The OpenSSH project is not planning to change the behaviour of OpenSSH regarding
the issue, details in "3.1 OpenSSH" in the publication.

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