The client side in OpenSSH 5.7 through 8.4 has an Observable Discrepancy leading to an…
Priority LOW 32CWE-203Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- High
- Impact type
- Information disclosure
- Confidentiality · integrity · availability
- High · None · None
- Fix status
- Partial Red Hat: 2 fixed, 3 without a fix
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and Red Hat. Impact type from CWE-203.
Summary
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.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.02949 87th percentileScored 2026-11-07
Fix Partial Red Hat: 1 advisoryRed Hat: 2 fixed, 3 without a fix
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 13
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:openbsd:openssh:*:*:*:*:*:*:*:* | 5.7 to before 8.4 | Vulnerable | OpenBSD |
| cpe:2.3:a:openbsd:openssh:8.4:-:*:*:*:*:*:* | 8.4 | Vulnerable | OpenBSD |
| cpe:2.3:a:openbsd:openssh:8.5:-:*:*:*:*:*:* | 8.5 | Vulnerable | OpenBSD |
| cpe:2.3:a:openbsd:openssh:8.6:-:*:*:*:*:*:* | 8.6 | Vulnerable | OpenBSD |
| cpe:2.3:o:netapp:aff_a700s_firmware:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | NetApp |
| cpe:2.3:h:netapp:aff_a700s:-:*:*:*:*:*:*:* | not specified by NVD | Running on | NetApp |
| cpe:2.3:a:netapp:active_iq_unified_manager:*:*:*:*:*:vmware_vsphere:*:* | 9.5 | Vulnerable | NetApp |
| cpe:2.3:a:netapp:hci_management_node:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | NetApp |
| cpe:2.3:a:netapp:ontap_select_deploy_administration_utility:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | NetApp |
| cpe:2.3:a:netapp:solidfire:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | NetApp |
- cpe:2.3:a:openbsd:openssh:*:*:*:*:*:*:*:* Versions 5.7 to before 8.4 Vulnerable ·OpenBSD
- cpe:2.3:a:openbsd:openssh:8.4:-:*:*:*:*:*:* Versions 8.4 Vulnerable ·OpenBSD
- cpe:2.3:a:openbsd:openssh:8.5:-:*:*:*:*:*:* Versions 8.5 Vulnerable ·OpenBSD
- cpe:2.3:a:openbsd:openssh:8.6:-:*:*:*:*:*:* Versions 8.6 Vulnerable ·OpenBSD
- cpe:2.3:o:netapp:aff_a700s_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
- cpe:2.3:h:netapp:aff_a700s:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·NetApp
- cpe:2.3:a:netapp:active_iq_unified_manager:*:*:*:*:*:vmware_vsphere:*:* Versions 9.5 Vulnerable ·NetApp
- cpe:2.3:a:netapp:hci_management_node:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
- cpe:2.3:a:netapp:ontap_select_deploy_administration_utility:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
- cpe:2.3:a:netapp:solidfire:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
Show 3 more CPE
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:netapp:steelstore_cloud_integrated_storage:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | NetApp |
| cpe:2.3:h:netapp:hci_compute_node:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | NetApp |
| cpe:2.3:h:netapp:hci_storage_node:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | NetApp |
- cpe:2.3:a:netapp:steelstore_cloud_integrated_storage:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
- cpe:2.3:h:netapp:hci_compute_node:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
- cpe:2.3:h:netapp:hci_storage_node:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
Remediation
Red Hat 1 advisory
- RHSA-2021:4368 Released 2021-11-09 · Red Hat rating Moderateopenssh security update
- Red Hat Enterprise Linux AppStream (v. 8) openssh-askpass-8.0p1-10.el8
- Red Hat Enterprise Linux BaseOS (v. 8) openssh-8.0p1-10.el8, openssh-cavs-8.0p1-10.el8, openssh-clients-8.0p1-10.el8 +4
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 5 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux 6 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux 7 | Affected | No fix planned: Will not fix |
| Red Hat Enterprise Linux AppStream (v. 8) | Fixed | RHSA-2021:4368 |
| Red Hat Enterprise Linux BaseOS (v. 8) | Fixed | RHSA-2021:4368 |
Timeline
- 2026-10-02 Threatist record created from CVE-2020-14145
- 2026-10-03 Alias added: GHSA-96g2-7cqx-5ggh
References
Patch 3
Advisory 5
- https://www.fzi.de/en/news/news/detail-en/artikel/fsa-2020-2-ausnutzung-eines-informationslecks-fuer-gezielte-mitm-angriffe-auf-ssh-clients/
- https://security.netapp.com/advisory/ntap-20200709-0004/
- https://docs.ssh-mitm.at/CVE-2020-14145.html
- https://github.com/ssh-mitm/ssh-mitm/blob/master/ssh_proxy_server/plugins/session/cve202014145.py
- GLSA-202105-35
Sources
- CVE-2020-14145 · CVE Program
- CVE-2020-14145 · NVD
- FIRST EPSS
- GHSA-96g2-7cqx-5ggh · GitHub Advisory Database · CC BY 4.0
- CVE-2020-14145 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences