Resource exhaustion in Fiberhome Fengine 28f-S
CVE-2017-5544
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.
Vulnerability class: DoS (Denial of Service)
EPSS: 0.053 (91.7th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H.
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- cve@mitre.org (URL Repurposed, x_refsource_MISC)
- cve@mitre.org (VDB Entry, Third Party Advisory, vdb-entry, x_refsource_BID)
Frequently asked questions
- What is CVE-2017-5544?
- CVE-2017-5544 is a medium-severity vulnerability in Fiberhome Fengine 28f-S, classified under Uncontrolled Resource Consumption. CVSS score: 5.9/10. Published 2017-01-23.
- How severe is CVE-2017-5544?
- Medium severity. CVSS v3 base score is 5.9 out of 10.
- Is CVE-2017-5544 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.