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CVE-2020-14145 Detail


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 3.x Severity and Metrics:

Base Score:  5.9 MEDIUM
Vector:  CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

NVD Analysts use publicly available information to associate vector strings and CVSS scores. We also display any CVSS information provided within the CVE List from the CNA.

Note: NVD Analysts have published a CVSS score for this CVE based on publicly available information at the time of analysis. The CNA has not provided a score within the CVE List.

References to Advisories, Solutions, and Tools

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Hyperlink Resource
http://www.openwall.com/lists/oss-security/2020/12/02/1 Mailing List  Patch  Third Party Advisory 
https://anongit.mindrot.org/openssh.git/commit/?id=b3855ff053f5078ec3d3c653cdaedefaa5fc362d Patch  Third Party Advisory 
https://docs.ssh-mitm.at/CVE-2020-14145.html Third Party Advisory 
https://github.com/openssh/openssh-portable/compare/V_8_3_P1...V_8_4_P1 Patch  Third Party Advisory 
https://github.com/ssh-mitm/ssh-mitm/blob/master/ssh_proxy_server/plugins/session/cve202014145.py Third Party Advisory 
https://security.gentoo.org/glsa/202105-35 Third Party Advisory 
https://security.netapp.com/advisory/ntap-20200709-0004/ 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/ Third Party Advisory 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-203 Observable Discrepancy cwe source acceptance level NIST  

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Change History

13 change records found show changes

Quick Info

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