CVE-2018-0331

MEDIUM

6.5

CVSS Score

Published: June 21, 2018 at 11:00 AM UTC

Updated: June 17, 2026 at 01:30 AM UTC

79 products affected across 1 vendorNx OSFirepower Extensible Operating SystemFxos

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Severity

MEDIUM6.5

Exploit prediction

EPSS 0.6%

SSVC

No known exploit

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Firepower Extensible Operating System · Cisco

95%

1.1 ≤ v < 2.0.1.1532.1.1 ≤ v < 2.1.1.862.2.1 ≤ v < 2.2.1.70

Affected range stops below 2.0.1.153, so it looks safe — our inference, not a vendor statement

Affected range stops below 2.1.1.86, so it looks safe — our inference, not a vendor statement

Affected range stops below 2.2.1.70, so it looks safe — our inference, not a vendor statement

cisco-firepower-4110 (environment) · cisco-firepower-4120 (environment) · cisco-firepower-4140 (environment) · cisco-firepower-4150 (environment) · cisco-firepower-9300-security-appliance (environment)

Fxos · Cisco

95%

1.1 ≤ v < 2.0.1.1522.2.2 ≤ v < 2.2.2.14

Affected range stops below 2.0.1.152, so it looks safe — our inference, not a vendor statement

Affected range stops below 2.2.2.14, so it looks safe — our inference, not a vendor statement

Nx OS · Cisconpm

95%

v < 2.2(8g)v < 7.0(3)i3v < 7.0(3)i7(1)2.5 ≤ v < 3.1(2f)5.2 ≤ v < 8.1(1a)6.0 ≤ v < 7.3(3)n1(1)6.2 ≤ v < 6.2(20)7.0(3)i4 ≤ v < 7.0(3)i7(1)7.1 ≤ v < 7.1(5)n1(1)7.2 ≤ v < 7.2(2)d1(3)7.3 ≤ v < 7.3(2)d1(1)7.3 ≤ v < 7.3(3)n1(1)8.1 ≤ v < 8.1(2)8.2 ≤ v < 8.2(1)6.0 7.0 7.2 8.0

Affected range stops below 2.2(8g), so it looks safe — our inference, not a vendor statement

Affected range stops below 3.1(2f), so it looks safe — our inference, not a vendor statement

Affected range stops below 6.2(20), so it looks safe — our inference, not a vendor statement

Affected range stops below 7.0(3)i3, so it looks safe — our inference, not a vendor statement

Affected range stops below 7.0(3)i7(1), so it looks safe — our inference, not a vendor statement

Affected range stops below 7.1(5)n1(1), so it looks safe — our inference, not a vendor statement

Affected range stops below 7.2(2)d1(3), so it looks safe — our inference, not a vendor statement

Affected range stops below 7.3(2)d1(1), so it looks safe — our inference, not a vendor statement

Affected range stops below 7.3(3)n1(1), so it looks safe — our inference, not a vendor statement

Affected range stops below 8.1(1a), so it looks safe — our inference, not a vendor statement

Affected range stops below 8.1(2), so it looks safe — our inference, not a vendor statement

Affected range stops below 8.2(1), so it looks safe — our inference, not a vendor statement

cisco-mds-9000 (environment) · cisco-nexus-172tq-xl (environment) · cisco-nexus-3016 (environment) · cisco-nexus-3048 (environment) · cisco-nexus-3064-32t (environment) · cisco-nexus-3064-t (environment) · cisco-nexus-3064-x (environment) · cisco-nexus-3100-v (environment) · cisco-nexus-31128pq (environment) · cisco-nexus-3132c-z (environment) · cisco-nexus-3132q (environment) · cisco-nexus-3132q-x (environment) · cisco-nexus-3132q-xl (environment) · cisco-nexus-3164q (environment) · cisco-nexus-3172pq (environment) · cisco-nexus-3172pq-xl (environment) · cisco-nexus-3172tq (environment) · cisco-nexus-3172tq-32t (environment) · cisco-nexus-3232c (environment) · cisco-nexus-3264c-e (environment) · cisco-nexus-3264q (environment) · cisco-nexus-34180yc (environment) · cisco-nexus-3524-x (environment) · cisco-nexus-3524-xl (environment) · cisco-nexus-3548 (environment) · cisco-nexus-3548-x (environment) · cisco-nexus-3548-xl (environment) · cisco-nexus-3636c-r (environment) · cisco-nexus-5000 (environment) · cisco-nexus-5010 (environment) · cisco-nexus-5020 (environment) · cisco-nexus-5548p (environment) · cisco-nexus-5548up (environment) · cisco-nexus-5596t (environment) · cisco-nexus-5596up (environment) · cisco-nexus-56128p (environment) · cisco-nexus-5624q (environment) · cisco-nexus-5648q (environment) · cisco-nexus-5672up (environment) · cisco-nexus-5696q (environment) · cisco-nexus-6001p (environment) · cisco-nexus-6001t (environment) · cisco-nexus-7000 (environment) · cisco-nexus-7700 (environment) · cisco-nexus-92160yc-x (environment) · cisco-nexus-92304qc (environment) · cisco-nexus-9236c (environment) · cisco-nexus-9272q (environment) · cisco-nexus-93108tc-ex (environment) · cisco-nexus-93120tx (environment) · cisco-nexus-93128tx (environment) · cisco-nexus-93180yc-ex (environment) · cisco-nexus-9332pq (environment) · cisco-nexus-9372px (environment) · cisco-nexus-9372tx (environment) · cisco-nexus-9396px (environment) · cisco-nexus-9396tx (environment) · cisco-nexus-9504 (environment) · cisco-nexus-9508 (environment) · cisco-nexus-9516 (environment) · cisco-nexus-c36180yc-r (environment) · cisco-nexus-n9k-c9508-fm-r (environment) · cisco-nexus-n9k-x9636c-r (environment) · cisco-nexus-n9k-x9636q-r (environment) · cisco-ucs-6120xp (environment) · cisco-ucs-6140xp (environment) · cisco-ucs-6248up (environment) · cisco-ucs-6296up (environment) · cisco-ucs-6324 (environment) · cisco-ucs-6332 (environment)

Unified Computing System Manager · Cisco

60%

All versions

Firepower 4110 · Ciscodevice

80%

All versions

Firepower 4120 · Ciscodevice

80%

All versions

Firepower 4140 · Ciscodevice

80%

All versions