Vulnerability Name:

CVE-2017-6655 (CCN-126990)

Assigned:2017-06-07
Published:2017-06-07
Updated:2021-12-16
Summary: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).
CVSS v3 Severity:6.5 Medium (CVSS v3.1 Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
5.7 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Adjacent
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): High
7.4 High (CCN CVSS v3.1 Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H)
6.4 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Adjacent
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Changed
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): High
CVSS v2 Severity:3.3 Low (CVSS v2 Vector: AV:A/AC:L/Au:N/C:N/I:N/A:P)
Exploitability Metrics:Access Vector (AV): Adjacent_Network
Access Complexity (AC): Low
Authentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Partial
6.1 Medium (CCN CVSS v2 Vector: AV:A/AC:L/Au:N/C:N/I:N/A:C)
Exploitability Metrics:Access Vector (AV): Adjacent_Network
Access Complexity (AC): Low
Athentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Complete
Vulnerability Type:CWE-119
Vulnerability Consequences:Denial of Service
References:Source: MITRE
Type: CNA
CVE-2017-6655

Source: BID
Type: Third Party Advisory, VDB Entry
98991

Source: CCN
Type: BID-98991
Cisco NX-OS Software CVE-2017-6655 Denial of Service Vulnerability

Source: SECTRACK
Type: Third Party Advisory, VDB Entry
1038628

Source: XF
Type: UNKNOWN
cisco-nxos-cve20176655-dos(126990)

Source: CCN
Type: Cisco Security Advisory cisco-sa-20170607-nxos
Cisco NX-OS Software Fibre Channel over Ethernet Denial of Service Vulnerability

Source: CONFIRM
Type: Vendor Advisory
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170607-nxos

Vulnerable Configuration:Configuration 1:
  • cpe:/o:cisco:nx-os:8.0(1)s2:*:*:*:*:*:*:*
  • OR cpe:/a:cisco:nx-os_for_nexus_5500_platform_switches:7.3(1)n1(1):*:*:*:*:*:*:*
  • OR cpe:/a:cisco:nx-os_for_nexus_5600_platform_switches:7.3(1)n1(1):*:*:*:*:*:*:*
  • OR cpe:/a:cisco:nx-os_for_nexus_7700_series_switches:8.0(1)(ed):*:*:*:*:*:*:*
  • OR cpe:/o:cisco:nx-os:8.0(1)s2:*:*:*:*:*:*:*
  • OR cpe:/a:cisco:mds_9000_nx-os:7.3(1)d1(1):*:*:*:*:*:*:*
  • OR cpe:/o:cisco:nx-os:8.3(0)cv(0.833):*:*:*:*:*:*:*

    • Configuration CCN 1:
  • cpe:/a:cisco:nx-os:*:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    BACK
    cisco nx-os 8.0(1)s2
    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 mds 9000 nx-os 7.3(1)d1(1)
    cisco nx-os 8.3(0)cv(0.833)
    cisco nx-os *