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CVE-2020-14145

Published: Jun 29, 2020Updated: Dec 18, 2025 Sources: CVE List NVD BDU csafCWE-203
NVD MITRE
5.9CVSSMEDIUM
EPSS Score
2.1%
Top 21.2%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

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.

CVSS Vector Breakdown

AV:NAC:HPR:NUI:NS:UC:HI:NA:N
Exploitability
AV:NAttack Vector
Network
AC:HAttack Complexity
High
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:NIntegrity
None
A:NAvailability
None
Open in CVSS calculator →

Weaknesses

CWE-203

Affected Products

n/an/a
UbuntuCanonical Ltd.
On-premOS
Operating Systems / linux-distro
Suse Linux Enterprise ServerNovell Inc.
On-premOS
Operating Systems / linux-distro
OpenSSHOpenBSD Project
LibraryLibrary
OSS Libraries / generic-library
Astra Linux Special EditionООО «РусБИТех-Астра»
On-premOS
Operating Systems / linux-distro
canonical ltd.commercialGBOperating Systemsaka canonical
novell inc.commercialUSOperating Systems
openbsd projectoss-projectUSOperating Systemsaka openbsd
ооо «русбитех-астра»commercialRUOperating Systemsaka rusbitech-astra
and 11 more affected products View all →

Attack Graph

Products CVE Techniques Tactics

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Exploitability

Official Patch Available

MITRE ATT&CK

1 technique
Discovery
View detailed technique mapping

References

https://github.com/openssh/openssh-portable/compare/V_8_3_P1...V_8_4_P1
github.com
https://www.fzi.de/en/news/news/detail-en/artikel/fsa-2020-2-ausnutzung-eines-informationslecks-fuer-gezielte-mitm-angriffe-auf-ssh-clients/
fzi.de
https://security.netapp.com/advisory/ntap-20200709-0004/
security.netapp.com
and 23 more references View all →

Timeline

Published
Jun 29, 2020
Last Updated
Dec 18, 2025

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