An issue was discovered on FiberHome Fengine S5800 switches V210R240. An unauthorized attacker can access the device's SSH service, using a password cracking tool to establish SSH connections quickly. This will trigger an increase in the SSH login timeout (each of the login attempts will occupy a connection slot for a longer time). Once this occurs, legitimate login attempts via SSH/telnet will be refused, resulting in a denial of service; you must restart the device.
Advisories
Source ID Title
EUVD EUVD EUVD-2017-14645 An issue was discovered on FiberHome Fengine S5800 switches V210R240. An unauthorized attacker can access the device's SSH service, using a password cracking tool to establish SSH connections quickly. This will trigger an increase in the SSH login timeout (each of the login attempts will occupy a connection slot for a longer time). Once this occurs, legitimate login attempts via SSH/telnet will be refused, resulting in a denial of service; you must restart the device.
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

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cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2024-08-05T15:04:15.292Z

Reserved: 2017-01-19T00:00:00

Link: CVE-2017-5544

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Deferred

Published: 2017-01-23T07:59:00.547

Modified: 2025-04-20T01:37:25.860

Link: CVE-2017-5544

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses