cbcvebase.
CVE-2018-0314
published 2018-06-20

CVE-2018-0314: A vulnerability in the Cisco Fabric Services (CFS) component of Cisco FXOS Software and Cisco NX-OS Software could allow an unauthenticated, remote attacker to…

PriorityP269critical9.8CVSS 3.0
AVNACLPRNUINSUCHIHAH
EPSS
5.96%
92.4th percentile
A vulnerability in the Cisco Fabric Services (CFS) component of Cisco FXOS Software and Cisco NX-OS Software could allow an unauthenticated, remote attacker to execute arbitrary code on an affected device. The vulnerability exists because the affected software insufficiently validates Cisco Fabric Services packet headers when the software processes packet data. An attacker could exploit this vulnerability by sending a maliciously crafted Cisco Fabric Services packet to an affected device. A successful exploit could allow the attacker to cause a buffer overflow condition on the device, which could allow the attacker to execute arbitrary code on the device. This vulnerability affects the following if configured to use Cisco Fabric Services: Firepower 4100 Series Next-Generation Firewalls, Firepower 9300 Security Appliance, MDS 9000 Series Multilayer Switches, Nexus 2000 Series Fabric Extenders, Nexus 3000 Series Switches, Nexus 3500 Platform Switches, Nexus 5500 Platform Switches, Nexus 5600 Platform Switches, Nexus 6000 Series Switches, Nexus 7000 Series Switches, Nexus 7700 Series Switches, Nexus 9000 Series Switches in standalone NX-OS mode, Nexus 9500 R-Series Line Cards and Fabric Modules, UCS 6100 Series Fabric Interconnects, UCS 6200 Series Fabric Interconnects, UCS 6300 Series Fabric Interconnects. Cisco Bug IDs: CSCvd69943, CSCve02429, CSCve02433, CSCve02435, CSCve02445, CSCve04859.

Affected

12 ranges
VendorProductVersion rangeFixed in
ciscofirepower_9000_firmware
ciscofirepower_9000_firmware
ciscofxos_and_nx-os
cisconexus_5000_firmware
cisconexus_5000_firmware
cisconexus_5000_firmware
cisconexus_7000_firmware
cisconexus_7000_firmware
cisconexus_7000_firmware
cisconexus_9000_firmware
ciscounified_computing_system_firmware
ciscounified_computing_system_firmware

Detection & IOCsextracted from sources · hover to see the quote

  • Exploit vector is a maliciously crafted Cisco Fabric Services (CFS) packet with invalid/malformed packet headers sent to an affected device; detect anomalous or malformed CFS protocol traffic on the network.
  • The vulnerability is triggered during CFS packet header validation; focus inspection on CFS packet header fields for malformed or oversized values that could trigger a buffer overflow.
  • Affected platforms include Firepower 4100/9300, MDS 9000, Nexus 2000/3000/3500/5500/5600/6000/7000/7700/9000/9500, and UCS 6100/6200/6300 — scope detection to these device types when configured to use CFS.
  • ·Vulnerability is only exploitable on devices that are configured to use Cisco Fabric Services (CFS); devices not using CFS are not affected.
  • ·There are no workarounds available for this vulnerability; patching via Cisco software updates is the only remediation.
  • ·Multiple Cisco Bug IDs are tracked for this vulnerability across different affected platforms: CSCvd69943, CSCve02429, CSCve02433, CSCve02435, CSCve02445, CSCve04859.

CVSS provenance

nvdv3.09.8CRITICALCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
nvdv2.07.5HIGHAV:N/AC:L/Au:N/C:P/I:P/A:P
vendor_cisco9.8CRITICAL
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