CVE-2017-6655

Name: CVE-2017-6655
Creator: NVD / NIST
Published: 2017-06-13T06:29:00.83+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.5/10EPSS 0.68%

Last modified Jun 17, 2026

CVE-2017-6655 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. A vulnerability in the Fibre Channel over Ethernet (FCoE) protocol implementation in Cisco NX-OS Software could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition when an FCoE-related process unexpectedly reloads. This vulnerability affects Cisco NX-OS Software on the following Cisco devices when they are configured for FCoE: Multilayer Director Switches, Nexus 7000 Series Switches, Nexus 7700 Series Switches. EPSS estimates a 0.68% chance of exploitation in the next 30 days.

Description

A vulnerability in the Fibre Channel over Ethernet (FCoE) protocol implementation in Cisco NX-OS Software could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition when an FCoE-related process unexpectedly reloads. This vulnerability affects Cisco NX-OS Software on the following Cisco devices when they are configured for FCoE: Multilayer Director Switches, Nexus 7000 Series Switches, Nexus 7700 Series Switches. More Information: CSCvc91729. Known Affected Releases: 8.3(0)CV(0.833). Known Fixed Releases: 8.3(0)ISH(0.62) 8.3(0)CV(0.944) 8.1(1) 8.1(0.8)S0 7.3(2)D1(0.47).

Metrics

CVSS 3.1

6.5/10

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

EPSS Probability

0.68%

47.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-119

Affected Software

Vendor	Product	Versions
Cisco	Mds 9000 Nx-Os	7.3\(1\)d1\(1\)
Cisco	Nx-Os For Nexus 5500 Platform Switches	7.3\(1\)n1\(1\)
Cisco	Nx-Os For Nexus 5600 Platform Switches	7.3\(1\)n1\(1\)
Cisco	Nx-Os For Nexus 7700 Series Switches	8.0\(1\)\(ed\)
Cisco	Nx-Os	8.0\(1\)s2
Cisco	Nx-Os	8.3\(0\)cv\(0.833\)

References

http://www.securityfocus.com/bid/98991Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1038628Third Party Advisory, VDB Entry
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170607-nxosVendor Advisory
http://www.securityfocus.com/bid/98991Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1038628Third Party Advisory, VDB Entry
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170607-nxosVendor Advisory

Timeline

Published: Jun 13, 2017
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2017-6655?

How severe is CVE-2017-6655?

CVE-2017-6655 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 0.68% probability of exploitation in the next 30 days.

How do I fix CVE-2017-6655?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2017-6655?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST