CVE-2020-14145 : The client side in OpenSSH 5.7 through 8.4 has an Observable Discrepancy leading

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.

Published 2020-06-29 18:15:12

Updated 2022-04-28 19:34:18

Source MITRE

View at NVD, CVE.org

Products affected by CVE-2020-14145

Openbsd » Openssh
Versions from including (>=) 5.7 and before (<) 8.4
cpe:2.3:a:openbsd:openssh:*:*:*:*:*:*:*:*
Matching versions
Openbsd » Openssh » Version: 8.4
cpe:2.3:a:openbsd:openssh:8.4:-:*:*:*:*:*:*
Matching versions
Openbsd » Openssh » Version: 8.5
cpe:2.3:a:openbsd:openssh:8.5:-:*:*:*:*:*:*
Matching versions
Openbsd » Openssh » Version: 8.6
cpe:2.3:a:openbsd:openssh:8.6:-:*:*:*:*:*:*
Matching versions
Netapp » Steelstore Cloud Integrated Storage » Version: N/A
cpe:2.3:a:netapp:steelstore_cloud_integrated_storage:-:*:*:*:*:*:*:*
Matching versions
Netapp » Ontap Select Deploy Administration Utility » Version: N/A
cpe:2.3:a:netapp:ontap_select_deploy_administration_utility:-:*:*:*:*:*:*:*
Matching versions
Netapp » Hci Management Node » Version: N/A
cpe:2.3:a:netapp:hci_management_node:-:*:*:*:*:*:*:*
Matching versions
Netapp » Solidfire » Version: N/A
cpe:2.3:a:netapp:solidfire:-:*:*:*:*:*:*:*
Matching versions
Netapp » Hci Storage Node » Version: N/A
cpe:2.3:h:netapp:hci_storage_node:-:*:*:*:*:*:*:*
Matching versions
Netapp » Hci Compute Node » Version: N/A
cpe:2.3:h:netapp:hci_compute_node:-:*:*:*:*:*:*:*
Matching versions
Netapp » Active Iq Unified Manager » For Vmware Vsphere
Versions from including (>=) 9.5
cpe:2.3:a:netapp:active_iq_unified_manager:*:*:*:*:*:vmware_vsphere:*:*
Matching versions
Netapp » Aff A700s Firmware » Version: N/A
cpe:2.3:o:netapp:aff_a700s_firmware:-:*:*:*:*:*:*:*
Matching versions
When used together with: Netapp » Aff A700s » Version: N/A

Threat overview for CVE-2020-14145

Top countries where our scanners detected CVE-2020-14145

Top open port discovered on systems with this issue 22

IPs affected by CVE-2020-14145 39,341,640

Threat actors abusing to this issue? Yes

Find out if you^* are affected by CVE-2020-14145!

^*Directly or indirectly through your vendors, service providers and 3rd parties. Powered by attack surface intelligence from SecurityScorecard.

Exploit prediction scoring system (EPSS) score for CVE-2020-14145

EPSS FAQ

1.25%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 78 %

Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2020-14145

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
4.3	MEDIUM	AV:N/AC:M/Au:N/C:P/I:N/A:N	8.6	2.9	NIST
Access Vector: Network Access Complexity: Medium Authentication: None Confidentiality Impact: Partial Integrity Impact: None Availability Impact: None
5.9	MEDIUM	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N	2.2	3.6	NIST
Attack Vector: Network Attack Complexity: High Privileges Required: None User Interaction: None Scope: Unchanged Confidentiality: High Integrity: None Availability: None

CWE ids for CVE-2020-14145

CWE-203 Observable Discrepancy

The product behaves differently or sends different responses under different circumstances in a way that is observable to an unauthorized actor, which exposes security-relevant information about the state of the product, such as whether a particular operation was successful or not.

Assigned by: nvd@nist.gov (Primary)

References for CVE-2020-14145

https://anongit.mindrot.org/openssh.git/commit/?id=b3855ff053f5078ec3d3c653cdaedefaa5fc362d

openssh.git - Portable OpenSSH
Patch;Third Party Advisory
https://security.netapp.com/advisory/ntap-20200709-0004/

CVE-2020-14145 OpenSSH Vulnerability in NetApp Products | NetApp Product Security
Third Party Advisory
https://github.com/ssh-mitm/ssh-mitm/blob/master/ssh_proxy_server/plugins/session/cve202014145.py

ssh-mitm/cve202014145.py at master · ssh-mitm/ssh-mitm · GitHub
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/

Detail en : FZI Forschungszentrum Informatik
Third Party Advisory

CVEs referencing this url
http://www.openwall.com/lists/oss-security/2020/12/02/1

oss-security - Some mitigation for openssh CVE-2020-14145
Mailing List;Patch;Third Party Advisory
https://docs.ssh-mitm.at/CVE-2020-14145.html

SSH-MITM Docs - CVE-2020-14145
Third Party Advisory
https://github.com/openssh/openssh-portable/compare/V_8_3_P1...V_8_4_P1

Comparing V_8_3_P1...V_8_4_P1 · openssh/openssh-portable · GitHub
Patch;Third Party Advisory
https://security.gentoo.org/glsa/202105-35

OpenSSH: Multiple vulnerabilities (GLSA 202105-35) — Gentoo security
Third Party Advisory

CVEs referencing this url