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CVE
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CVE-2020-14145Date: (C)2020-06-30   (M)2023-12-22


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 Score and Metrics +CVSS Score and Metrics -

CVSS V3 Severity:CVSS V2 Severity:
CVSS Score : 5.9CVSS Score : 4.3
Exploit Score: 2.2Exploit Score: 8.6
Impact Score: 3.6Impact Score: 2.9
 
CVSS V3 Metrics:CVSS V2 Metrics:
Attack Vector: NETWORKAccess Vector: NETWORK
Attack Complexity: HIGHAccess Complexity: MEDIUM
Privileges Required: NONEAuthentication: NONE
User Interaction: NONEConfidentiality: PARTIAL
Scope: UNCHANGEDIntegrity: NONE
Confidentiality: HIGHAvailability: NONE
Integrity: NONE 
Availability: NONE 
  
Reference:
GLSA-202105-35
http://www.openwall.com/lists/oss-security/2020/12/02/1
https://anongit.mindrot.org/openssh.git/commit/?id=b3855ff053f5078ec3d3c653cdaedefaa5fc362d
https://docs.ssh-mitm.at/CVE-2020-14145.html
https://github.com/openssh/openssh-portable/compare/V_8_3_P1...V_8_4_P1
https://github.com/ssh-mitm/ssh-mitm/blob/master/ssh_proxy_server/plugins/session/cve202014145.py
https://security.netapp.com/advisory/ntap-20200709-0004/
https://www.fzi.de/en/news/news/detail-en/artikel/fsa-2020-2-ausnutzung-eines-informationslecks-fuer-gezielte-mitm-angriffe-auf-ssh-clients/

CPE    1
cpe:/a:openbsd:openssh
CWE    1
CWE-203
OVAL    13
oval:org.secpod.oval:def:506497
oval:org.secpod.oval:def:89002804
oval:org.secpod.oval:def:89050351
oval:org.secpod.oval:def:89050306
...

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