Cisco NX-OS Fibre Channel over Ethernet Frame memory corruption

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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A vulnerability was found in Cisco NX-OS (Router Operating System) (unknown version) and classified as critical. This issue affects an unknown code of the component Fibre Channel over Ethernet Frame Handler. The manipulation with an unknown input leads to a memory corruption vulnerability. Using CWE to declare the problem leads to CWE-119. Impacted is availability.

The bug was discovered 06/07/2017. The weakness was published 06/07/2017 by Cisco with Cisco as cisco-sa-20170607-nxos as confirmed advisory (Website). It is possible to read the advisory at The identification of this vulnerability is CVE-2017-6655 since 03/09/2017. The attack needs to be initiated within the local network. No form of authentication is needed for a successful exploitation. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 12/26/2020).

The vulnerability scanner Nessus provides a plugin with the ID 100840 (Cisco NX-OS Fibre Channel over Ethernet DoS (cisco-sa-20170607-nxos)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family CISCO and running in the context local. The commercial vulnerability scanner Qualys is able to test this issue with plugin 316124 (Cisco NX-OS Software Fibre Channel over Ethernet Denial of Service Vulnerability (cisco-sa-20170607-nxos)).

Upgrading eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at SecurityFocus (BID 98991), SecurityTracker (ID 1038628) and Tenable (100840).





CPE 2.3infoedit

CPE 2.2infoedit


VulDB Meta Base Score: 6.8
VulDB Meta Temp Score: 6.5

VulDB Base Score: 6.5
VulDB Temp Score: 6.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

Vendor Base Score (Cisco): 7.4
Vendor Vector (Cisco): 🔍

NVD Base Score: 6.5
NVD Vector: 🔍



VulDB Base Score: 🔍
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Class: Memory corruption
CWE: CWE-119
ATT&CK: Unknown

Local: No
Remote: Partially

Availability: 🔍
Status: Not defined

Price Prediction: 🔍
Current Price Estimation: 🔍


Nessus ID: 100840
Nessus Name: Cisco NX-OS Fibre Channel over Ethernet DoS (cisco-sa-20170607-nxos)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 103402
OpenVAS Name: Cisco NX-OS Software Fibre Channel over Ethernet Denial of Service Vulnerability
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfoedit

Threat: 🔍
Adversaries: 🔍
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Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍


03/09/2017 🔍
06/07/2017 +90 days 🔍
06/07/2017 +0 days 🔍
06/07/2017 +0 days 🔍
06/07/2017 +0 days 🔍
06/08/2017 +1 days 🔍
06/09/2017 +1 days 🔍
06/13/2017 +4 days 🔍
06/16/2017 +3 days 🔍
12/26/2020 +1289 days 🔍



Advisory: cisco-sa-20170607-nxos
Researcher: Cisco
Organization: Cisco
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2017-6655 (🔍)
SecurityFocus: 98991 - Cisco NX-OS Software CVE-2017-6655 Denial of Service Vulnerability
SecurityTracker: 1038628


Created: 06/09/2017 09:22 AM
Updated: 12/26/2020 05:06 PM
Changes: (1) advisory_person_name
Complete: 🔍


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