CVE-2020-14145
MEDIUM 5.9EPSS 2.9%
The client side in OpenSSH 5.7 through 8.4 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). NOTE: some reports state that 8.5 and 8.6 are also affected.
- CVSS v3.1 NVD
- 5.9 MEDIUM
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N - CVSS v2.0 NVD
- 4.3 MEDIUM
AV:N/AC:M/Au:N/C:P/I:N/A:N - EPSS
- 2.95% chance of exploitation in the next 30 days, 87th percentile
- Published
- 2020-06-29
- Updated
- 2026-10-14
Proof-of-concept exploits (1)
- J0hnKn1f3/UltraRecon0★ · 2025-05-20
Security advisories
- http://www.openwall.com/lists/oss-security/2020/12/02/1
- https://anongit.mindrot.org/openssh.git/commit/?id=b3855ff053f5078ec3d3c653cdaedefaa5fc36…
- https://docs.ssh-mitm.at/CVE-2020-14145.html
- openssh/openssh-portable/compare/V_8_3_P1...V_8_4_P1
- ssh-mitm/ssh-mitm/blob/master/ssh_proxy_server/plugins/session/cve202014145.py
- https://security.gentoo.org/glsa/202105-35
- https://security.netapp.com/advisory/ntap-20200709-0004
- https://www.fzi.de/en/news/news/detail-en/artikel/fsa-2020-2-ausnutzung-eines-information…