CVE-2019-1616: A vulnerability in the Cisco Fabric Services component of Cisco NX-OS Software could allow an unauthenticated, remote attacker to cause a buffer overf...

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).

Metrics

EPSS Probability

2.42%

82.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Cisco	Nx-Os	>= 8.2, < 8.3\(1\)
Cisco	Nx-Os	>= 7.0\(3\), < 7.0\(3\)i7\(4\)
Cisco	Nx-Os	>= 7.0\(3\)i5, < 7.0\(3\)i7\(4\)
Cisco	Nx-Os	>= 7.0\(3\)f3, < 7.0\(3\)f3\(3c\)
Cisco	Nx-Os	>= 7.2, < 8.2\(3\)
Cisco	Nx-Os	>= 7.0\(3\)f1, < 7.0\(3\)f3\(3c\)
Cisco	Nx-Os	>= 7.3, < 8.1\(1b\)
Cisco	Nx-Os	>= 5.2, < 6.2\(25\)
Cisco	Nx-Os	>= 7.0\(3\)i4, < 7.0\(3\)i4\(9\)
Cisco	Nx-Os	>= 6.2, < 6.2\(22\)
Cisco	Nx-Os	< 6.2\(22\)
Cisco	Nx-Os	< 7.0\(3\)i4\(9\)
Cisco	Nx-Os	>= 6.0\(2\)a8, < 6.0\(2\)a8\(10\)
Cisco	Nx-Os	<= 6.0\(2\)a8
Cisco	Nx-Os	<= 7.0\(3\)i4
Cisco	Nx-Os	>= 4.0, < 4.0\(2a\)
Cisco	Nx-Os	< 3.2\(3j\)

References

http://www.securityfocus.com/bid/107395Third Party Advisory, VDB Entry
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190306-nxos-fabric-dosVendor Advisory
http://www.securityfocus.com/bid/107395Third Party Advisory, VDB Entry
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190306-nxos-fabric-dosVendor Advisory

Timeline

Published: Mar 11, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2019-1616?

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).

How severe is CVE-2019-1616?

Severity scoring for CVE-2019-1616 is pending analysis. The EPSS model estimates a 2.42% probability of exploitation in the next 30 days.

How do I fix CVE-2019-1616?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.