CVE-2020-14145

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Summary

CVECVE-2020-14145
StatePUBLISHED
Assignermitre
Source PriorityCVE Program / NVD first with legacy fallback
Published2020-06-29 18:15:11 UTC
Updated2026-10-14 10:17:29 UTC
DescriptionThe 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.

Risk And Classification

Primary CVSS: v3.1 5.9 MEDIUM from [email protected]

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

Problem Types: CWE-203 | n/a | CWE-203 CWE-203 Observable Discrepancy

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary5.9MEDIUMCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
3.1ADPDECLARED5.9MEDIUMCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
3.1134c704f-9b21-4f2e-91b3-4a467353bcc0Secondary5.9MEDIUMCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
2.0[email protected]Primary4.3AV:N/AC:M/Au:N/C:P/I:N/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

CVSS v2.0 Breakdown

Access Vector
Network
Access Complexity
Medium
Authentication
None
Confidentiality
Partial
Integrity
None
Availability
None

AV:N/AC:M/Au:N/C:P/I:N/A:N

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Netapp Active Iq Unified Manager All All All All
Hardware Netapp Aff A700s - All All All
Operating System Netapp Aff A700s Firmware - All All All
Hardware Netapp Hci Compute Node - All All All
Application Netapp Hci Management Node - All All All
Hardware Netapp Hci Storage Node - All All All
Application Netapp Ontap Select Deploy Administration Utility - All All All
Application Netapp Solidfire - All All All
Application Netapp Steelstore Cloud Integrated Storage - All All All
Application Openbsd Openssh All All All All
Application Openbsd Openssh 8.4 - All All
Application Openbsd Openssh 8.5 - All All
Application Openbsd Openssh 8.6 - All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Na N/a affected n/a Not specified
ADP Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP affected V3.1.0 V3.1.5 custom Not specified
ADP Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP affected V3.1.0 V3.1.5 custom Not specified
ADP Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP affected V3.1.0 V3.1.5 custom Not specified
ADP Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP affected V3.1.0 V3.1.5 custom Not specified
ADP Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP affected V3.1.0 V3.1.5 custom Not specified

References

ReferenceSourceLinkTags
cert-portal.siemens.com/productcert/html/ssa-398330.html 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e cert-portal.siemens.com
SSH-MITM Docs - CVE-2020-14145 af854a3a-2127-422b-91ae-364da2661108 docs.ssh-mitm.at Third Party Advisory
openssh.git - Portable OpenSSH af854a3a-2127-422b-91ae-364da2661108 anongit.mindrot.org Patch, Third Party Advisory
oss-security - Some mitigation for openssh CVE-2020-14145 af854a3a-2127-422b-91ae-364da2661108 www.openwall.com Mailing List, Patch, Third Party Advisory
ssh-mitm/cve202014145.py at master · ssh-mitm/ssh-mitm · GitHub af854a3a-2127-422b-91ae-364da2661108 github.com Third Party Advisory
OpenSSH: Multiple vulnerabilities (GLSA 202105-35) — Gentoo security af854a3a-2127-422b-91ae-364da2661108 security.gentoo.org Third Party Advisory
CVE-2020-14145 OpenSSH Vulnerability in NetApp Products | NetApp Product Security af854a3a-2127-422b-91ae-364da2661108 security.netapp.com Third Party Advisory
Comparing V_8_3_P1...V_8_4_P1 · openssh/openssh-portable · GitHub af854a3a-2127-422b-91ae-364da2661108 github.com Patch, Third Party Advisory
Detail en : FZI Forschungszentrum Informatik af854a3a-2127-422b-91ae-364da2661108 www.fzi.de Third Party Advisory
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Legacy QID Mappings

  • 159496 Oracle Enterprise Linux Security Update for openssh (ELSA-2021-4368)
  • 239822 Red Hat Update for openssh (RHSA-2021:4368)
  • 376243 F5 BIG-IP Local Traffic Manager (LTM), Application Security Manager (ASM), Access Policy Manager (APM) OpenSSH client Vulnerability (K48050136)
  • 376465 F5 BIG-IP Application Security Manager (ASM), Local Traffic Manager (LTM), Access Policy Manager (APM) OpenSSH Client Vulnerability (K48050136)
  • 38902 OpenSSH Man-in-the-Middle (MITM) Attack Vulnerability
  • 500488 Alpine Linux Security Update for openssh
  • 501463 Alpine Linux Security Update for openssh
  • 504247 Alpine Linux Security Update for openssh
  • 591406 Siemens SIMATIC S7-1500 CPU GNU/Linux subsystem Multiple Vulnerabilities (SSB-439005, ICSA-22-104-13)
  • 670195 EulerOS Security Update for openssh (EulerOS-SA-2021-1694)
  • 710079 Gentoo Linux OpenSSH Multiple vulnerabilities (GLSA 202105-35)
  • 750479 OpenSUSE Security Update for openssh (openSUSE-SU-2020:2298-1)
  • 750494 OpenSUSE Security Update for openssh (openSUSE-SU-2020:2240-1)
  • 900081 CBL-Mariner Linux Security Update for openssh 8.0p1
  • 903500 Common Base Linux Mariner (CBL-Mariner) Security Update for openssh (2520)
  • 940145 AlmaLinux Security Update for openssh (ALSA-2021:4368)
  • 960784 Rocky Linux Security Update for openssh (RLSA-2021:4368)

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