CVE-2019-1616

Cisco NX-OS Software Cisco Fabric Services Denial of Service Vulnerability

HIGH

8.6

CVSS Score

Published: March 11, 2019 at 10:00 PM UTC

Updated: June 17, 2026 at 02:28 AM UTC

15 products affected across 1 vendorNx OSUcs 6300Ucs 6200

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Severity

HIGH8.6

Exploit prediction

EPSS 2%

SSVC

No known exploit

Description

A vulnerability in the Cisco Fabric Services component of Cisco NX-OS Software could allow an unauthenticated, remote attacker to cause a buffer overflow, resulting in a denial of service (DoS) condition. The vulnerability is due to insufficient validation of Cisco Fabric Services packets. An attacker could exploit this vulnerability by sending a crafted Cisco Fabric Services packet to an affected device. A successful exploit could allow the attacker to cause a buffer overflow, resulting in process crashes and a DoS condition on the device. MDS 9000 Series Multilayer Switches are affected running software versions prior to 6.2(25), 8.1(1b), 8.3(1). Nexus 3000 Series Switches are affected running software versions prior to 7.0(3)I4(9) and 7.0(3)I7(4). Nexus 3500 Platform Switches are affected running software versions prior to 6.0(2)A8(10) and 7.0(3)I7(4). Nexus 3600 Platform Switches are affected running software versions prior to 7.0(3)F3(5) Nexus 7000 and 7700 Series Switches are affected running software versions prior to 6.2(22) and 8.2(3). Nexus 9000 Series Switches in Standalone NX-OS Mode are affected running software versions prior to 7.0(3)I4(9) and 7.0(3)I7(4). Nexus 9500 R-Series Line Cards and Fabric Modules are affected running software versions prior to 7.0(3)F3(5). UCS 6200, 6300, and 6400 Fabric Interconnects are affected running software versions prior to 3.2(3j) and 4.0(2a).

Affected

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

Nx OS · Cisconpm

95%

v ≤ 6.0(2)a8v ≤ 7.0(3)i4v < 3.2(3j)v < 6.2(22)v < 7.0(3)i4(9)4.0 ≤ v < 4.0(2a)5.2 ≤ v < 6.2(25)6.0(2)a8 ≤ v < 6.0(2)a8(10)6.2 ≤ v < 6.2(22)7.0(3) ≤ v < 7.0(3)i7(4)7.0(3)f1 ≤ v < 7.0(3)f3(3c)7.0(3)f3 ≤ v < 7.0(3)f3(3c)7.0(3)i4 ≤ v < 7.0(3)i4(9)7.0(3)i5 ≤ v < 7.0(3)i7(4)7.2 ≤ v < 8.2(3)7.3 ≤ v < 8.1(1b)8.2 ≤ v < 8.3(1)

Affected range stops below 3.2(3j), so it looks safe — our inference, not a vendor statement

Affected range stops below 4.0(2a), so it looks safe — our inference, not a vendor statement

Affected range stops below 6.0(2)a8(10), so it looks safe — our inference, not a vendor statement

Affected range stops below 6.2(22), so it looks safe — our inference, not a vendor statement

Affected range stops below 6.2(25), so it looks safe — our inference, not a vendor statement

Affected range stops below 7.0(3)f3(3c), so it looks safe — our inference, not a vendor statement

Affected range stops below 7.0(3)i4(9), so it looks safe — our inference, not a vendor statement

Affected range stops below 7.0(3)i7(4), so it looks safe — our inference, not a vendor statement

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

Affected range stops below 8.2(3), so it looks safe — our inference, not a vendor statement

Affected range stops below 8.3(1), so it looks safe — our inference, not a vendor statement

cisco-mds-9000 (environment) · cisco-nexus-3000 (environment) · cisco-nexus-3500 (environment) · cisco-nexus-3600 (environment) · cisco-nexus-7000 (environment) · cisco-nexus-7700 (environment) · cisco-nexus-9000 (environment) · cisco-nexus-9500 (environment) · cisco-ucs-6200 (environment) · cisco-ucs-6300 (environment) · cisco-ucs-6400 (environment)

Mds 9000 · Cisco

60%

v < 6.2(25)v < 8.1(1b)v < 8.3(1)

Affected range stops below 6.2(25), so it looks safe — our inference, not a vendor statement

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

Affected range stops below 8.3(1), so it looks safe — our inference, not a vendor statement

Nexus 3000 · Cisco

60%

v < 7.0(3)I4(9)v < 7.0(3)I7(4)

Affected range stops below 7.0(3)I4(9), so it looks safe — our inference, not a vendor statement

Affected range stops below 7.0(3)I7(4), so it looks safe — our inference, not a vendor statement

Nexus 3500 · Cisco

60%

v < 6.0(2)A8(10)v < 7.0(3)I7(4)

Affected range stops below 6.0(2)A8(10), so it looks safe — our inference, not a vendor statement

Affected range stops below 7.0(3)I7(4), so it looks safe — our inference, not a vendor statement

Nexus 3600 · Cisco

60%

v < 7.0(3)F3(5)

Affected range stops below 7.0(3)F3(5), so it looks safe — our inference, not a vendor statement

Nexus 7000 · Cisco

60%

v < 6.2(22)v < 8.2(3)

Affected range stops below 6.2(22), so it looks safe — our inference, not a vendor statement

Affected range stops below 8.2(3), so it looks safe — our inference, not a vendor statement

Nexus 7700 · Cisco

60%

v < 6.2(22)v < 8.2(3)

Affected range stops below 6.2(22), so it looks safe — our inference, not a vendor statement

Affected range stops below 8.2(3), so it looks safe — our inference, not a vendor statement

Nexus 9000 · Cisco

60%

v < 7.0(3)I4(9)v < 7.0(3)I7(4)

Affected range stops below 7.0(3)I4(9), so it looks safe — our inference, not a vendor statement

Affected range stops below 7.0(3)I7(4), so it looks safe — our inference, not a vendor statement

Nexus 9500 · Cisco

60%

v < 7.0(3)F3(5)

Affected range stops below 7.0(3)F3(5), so it looks safe — our inference, not a vendor statement

Ucs 6200-fabric Interconnect · Cisco

60%

v < 3.2(3j)v < 4.0(2a)

Affected range stops below 3.2(3j), so it looks safe — our inference, not a vendor statement

Affected range stops below 4.0(2a), so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190306-nxos-fabric-dos

References (2)

VDB Entryx_refsource_BIDThird Party Advisory

Source: [email protected]

http://www.securityfocus.com/bid/107395

Vendor Advisoryx_refsource_CISCO

Source: [email protected]

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190306-nxos-fabric-dos

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.6HIGHcisco

Attack Vector: NETWORK
Complexity: LOW
Privileges: NONE
User Interaction: NONE
Scope: CHANGED
Confidentiality: NONE
Integrity: NONE
Availability: HIGH

Vector?

Quick Info

StatusMODIFIED

CWE

CWE-20CWE-119

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