What’s Vulnerable › Vulnerabilities

CVE-2020-14145

• Severity: medium (CVSS 5.9 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.9% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-06-29 · updated 2026-10-14
• Weakness: CWE-203

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.

Affected products

• Active IQ Unified Manager for VMware vSphere, Linux, and Microsoft Windows: from 9.5
• NetApp Aff A700S Firmware: all versions
• NetApp Hci Compute Node: all versions
• NetApp Hci Management Node: all versions
• NetApp Hci Storage Node: all versions
• NetApp ONTAP Select Deploy administration utility: all versions
• NetApp Solidfire: all versions
• NetApp Steelstore Cloud Integrated Storage: all versions
• OpenSSH: from 5.7 before 8.4; 8.4, 8.5, 8.6 — fixed in 8.4

How to fix

Upgrade to a fixed version: OpenSSH 8.4. Check the vendor advisory for mitigations.

References

• 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.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-informationslecks-fuer-gezielte-mitm-angriffe-auf-ssh-clients/
• 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

Get alerted when CVE-2020-14145 or the next vulnerability affects your stack