CVE-2020-14145

5.9 MEDIUM
Published: June 29, 2020 Modified: December 18, 2025
View on NVD

Description

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.

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CVSS v3.x Details

0.0 Low Medium High Critical 10.0
Vector String
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory
http://www.openwall.com/lists/oss-security/2020/12/02/1
Source: cve@mitre.org
Mailing List Patch Third Party Advisory
https://anongit.mindrot.org/openssh.git/commit/?id=b3855ff053f5078ec3d3c653cdaedefaa5fc362d
Source: cve@mitre.org
Patch Third Party Advisory
https://docs.ssh-mitm.at/CVE-2020-14145.html
Source: cve@mitre.org
Third Party Advisory
https://github.com/openssh/openssh-portable/compare/V_8_3_P1...V_8_4_P1
Source: cve@mitre.org
Patch Third Party Advisory
https://github.com/ssh-mitm/ssh-mitm/blob/master/ssh_proxy_server/plugins/session/cve202014145.py
Source: cve@mitre.org
Third Party Advisory
https://security.gentoo.org/glsa/202105-35
Source: cve@mitre.org
Third Party Advisory
https://security.netapp.com/advisory/ntap-20200709-0004/
Source: cve@mitre.org
Third Party Advisory
https://www.fzi.de/en/news/news/detail-en/artikel/fsa-2020-2-ausnutzung-eines-informationslecks-fuer-gezielte-mitm-angriffe-auf-ssh-clients/
Source: cve@mitre.org
Third Party Advisory
http://www.openwall.com/lists/oss-security/2020/12/02/1
Source: af854a3a-2127-422b-91ae-364da2661108
Mailing List Patch Third Party Advisory
https://anongit.mindrot.org/openssh.git/commit/?id=b3855ff053f5078ec3d3c653cdaedefaa5fc362d
Source: af854a3a-2127-422b-91ae-364da2661108
Patch Third Party Advisory
https://docs.ssh-mitm.at/CVE-2020-14145.html
Source: af854a3a-2127-422b-91ae-364da2661108
Third Party Advisory
https://github.com/openssh/openssh-portable/compare/V_8_3_P1...V_8_4_P1
Source: af854a3a-2127-422b-91ae-364da2661108
Patch Third Party Advisory
https://github.com/ssh-mitm/ssh-mitm/blob/master/ssh_proxy_server/plugins/session/cve202014145.py
Source: af854a3a-2127-422b-91ae-364da2661108
Third Party Advisory
https://security.gentoo.org/glsa/202105-35
Source: af854a3a-2127-422b-91ae-364da2661108
Third Party Advisory
https://security.netapp.com/advisory/ntap-20200709-0004/
Source: af854a3a-2127-422b-91ae-364da2661108
Third Party Advisory
https://www.fzi.de/en/news/news/detail-en/artikel/fsa-2020-2-ausnutzung-eines-informationslecks-fuer-gezielte-mitm-angriffe-auf-ssh-clients/
Source: af854a3a-2127-422b-91ae-364da2661108
Third Party Advisory

16 reference(s) from NVD

Quick Stats

CVSS v3 Score
5.9 / 10.0
EPSS (Exploit Probability)
1.3%
79th percentile
Exploitation Status
Not in CISA KEV

Weaknesses (CWE)

CWE-203 CWE-203

Affected Vendors

openbsd netapp

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