medium
6.5
CWE
20 399
Advisory Published
Updated

CVE-2018-0331: Input Validation

First published: Thu Jun 21 2018(Updated: )

A vulnerability in the Cisco Discovery Protocol (formerly known as CDP) subsystem of devices running, or based on, Cisco NX-OS Software contain a vulnerability that could allow an unauthenticated, adjacent attacker to create a denial of service (DoS) condition. The vulnerability is due to a failure to properly validate certain fields within a Cisco Discovery Protocol message prior to processing it. An attacker with the ability to submit a Cisco Discovery Protocol message designed to trigger the issue could cause a DoS condition on an affected device while the device restarts. This vulnerability affects Firepower 4100 Series Next-Generation Firewall, Firepower 9300 Security Appliance, MDS 9000 Series Multilayer Director Switches, Nexus 1000V Series Switches, Nexus 1100 Series Cloud Services Platforms, Nexus 2000 Series Switches, Nexus 3000 Series Switches, Nexus 3500 Platform Switches, Nexus 3600 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 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: CSCvc89242, CSCve40943, CSCve40953, CSCve40965, CSCve40970, CSCve40978, CSCve40992, CSCve41000, CSCve41007.

Credit: ykramarz@cisco.com

Affected SoftwareAffected VersionHow to fix
Cisco NX-OS>=7.1<7.1\(5\)n1\(1\)
Cisco NX-OS>=7.3<7.3\(3\)n1\(1\)
Cisco NX-OS=6.0
Cisco NX-OS=7.0
Cisco NX-OS=7.2
Cisco Nexus 5000 firmware
Cisco Nexus 5010
Cisco Nexus 5020
Cisco Nexus 5548P Firmware
Cisco Nexus 5548UP Firmware
Cisco Nexus 5596T Firmware
Cisco Nexus 5596UP Firmware
Cisco 56128p
Cisco Nexus 5624Q Firmware
Cisco Nexus 5648Q Firmware
Cisco Nexus 5672UP-16G
Cisco Nexus 5696Q Firmware
Cisco NX-OS>=6.2<6.2\(20\)
Cisco NX-OS>=7.2<7.2\(2\)d1\(3\)
Cisco NX-OS>=7.3<7.3\(2\)d1\(1\)
Cisco NX-OS>=8.1<8.1\(2\)
Cisco NX-OS>=8.2<8.2\(1\)
Cisco NX-OS=8.0
Cisco Nexus 7000
Cisco Nexus 7700 series
Cisco NX-OS<7.0\(3\)i3
Cisco NX-OS>=7.0\(3\)i4<7.0\(3\)i7\(1\)
Cisco Nexus 92160YC Switch
Cisco Nexus 92304QC Switch
Cisco Nexus 9236C Switch
Cisco Nexus 9272Q Switch
Cisco Nexus
Cisco Nexus 93120TX Firmware
Cisco Nexus 93128 Firmware
Cisco Nexus 93180YC-EX-24
Cisco Nexus 9332PQ Firmware
Cisco Nexus 9372PX-E
Cisco Nexus 9372TX
Cisco Nexus 9396PX Firmware
Cisco Nexus 9396TX Firmware
Cisco Nexus 9504 firmware
Cisco Nexus 9508
Cisco Nexus 9516 firmware
Cisco Nexus 9508
Cisco x9636q-r
Cisco Nexus X9636Q-R
Cisco NX-OS<7.0\(3\)i7\(1\)
Cisco Nexus 172tq-xl
Cisco Nexus 3016Q Firmware
Cisco Nexus 3048 Firmware
Cisco Nexus 3064
Cisco Nexus 3064
Cisco Nexus 3064x
Cisco Nexus 3100V Firmware
Cisco Nexus 31128PQ
Cisco Nexus 3132C-Z Firmware
Cisco Nexus 3132Q-XL
Cisco Nexus 3132Q-X/3132Q-XL
Cisco Nexus 3132Q-XL Firmware
Cisco Nexus 3164Q Firmware
Cisco Nexus 3172PQ/PQ-XL
Cisco Nexus 3172PQ-XL Firmware
Cisco Nexus 3172TQ Firmware
Cisco Nexus 3172TQ-XL
Cisco Nexus 3232C
Cisco Nexus 3264C-E Firmware
Cisco Nexus 3264Q Firmware
Cisco Nexus 34180YC Firmware
Cisco Nexus 3524-xl
Cisco Nexus 3524-XL Firmware
Cisco Nexus 3548-X/XL Firmware
Cisco Nexus 3548-X/XL
Cisco Nexus 3548-X/XL
Cisco Nexus 3636C-R Firmware
Cisco Nexus 36180YC-R
Cisco NX-OS>=6.0<7.3\(3\)n1\(1\)
Cisco Nexus 6001P Firmware
Cisco Nexus 6001T Firmware
Cisco NX-OS>=5.2<8.1\(1a\)
Cisco MDS 9000 Series Multilayer Switches
Cisco NX-OS<2.2\(8g\)
Cisco NX-OS>=2.5<3.1\(2f\)
Cisco UCS 6120xp
Cisco UCS 6140xp
Cisco UCS 6248UP
Cisco UCS 6296UP
Cisco UCS 6324 firmware
Cisco UCS 6332
Cisco Firepower Extensible Operating System>=1.1<2.0.1.153
Cisco Firepower Extensible Operating System>=2.1.1<2.1.1.86
Cisco Firepower Extensible Operating System>=2.2.1<2.2.1.70
Cisco FX-OS>=2.2.2<2.2.2.14
Cisco Firepower 4110 Next-Generation Firewall
Cisco Firepower 4120 Next-Generation Firewall
Cisco Firepower 4140 Next-Generation Firewall
Cisco Firepower 4150 Next-Generation Firewall
Cisco FX-OS>=1.1<2.0.1.152
Cisco Firepower 9300 Security Appliances

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Reference Links

Frequently Asked Questions

  • What is the severity of CVE-2018-0331?

    The severity of CVE-2018-0331 is classified as high due to its potential to cause denial of service (DoS) conditions.

  • How do I fix CVE-2018-0331?

    To fix CVE-2018-0331, update your Cisco NX-OS to a version that is not affected by this vulnerability.

  • Who is affected by CVE-2018-0331?

    CVE-2018-0331 affects devices running certain versions of Cisco NX-OS, particularly those prior to the fixed releases.

  • What types of attacks can exploit CVE-2018-0331?

    CVE-2018-0331 can be exploited by unauthenticated adjacent attackers to create a denial of service condition.

  • Is there a workaround for CVE-2018-0331?

    There are no specific workarounds for CVE-2018-0331; patching to a secure version is recommended.

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