title: Cisco NX-OS Software Cisco Fabric Services Denial of Service Vulnerability
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).
problem types: CWE-20
affected:
{
product: MDS 9000 Series Multilayer Switches
vendor: Cisco
versions:
lessThan: 6.2(25), status: affected, version: unspecified, versionType: custom
lessThan: 8.1(1b), status: affected, version: unspecified, versionType: custom
lessThan: 8.3(1), status: affected, version: unspecified, versionType: custom
}
{
product: Nexus 3000 Series Switches
vendor: Cisco
versions:
lessThan: 7.0(3)I4(9), status: affected, version: unspecified, versionType: custom
lessThan: 7.0(3)I7(4), status: affected, version: unspecified, versionType: custom
}
{
product: Nexus 3500 Platform Switches
vendor: Cisco
versions:
lessThan: 6.0(2)A8(10), status: affected, version: unspecified, versionType: custom
lessThan: 7.0(3)I7(4), status: affected, version: unspecified, versionType: custom
}
{
product: Nexus 3600 Platform Switches
vendor: Cisco
versions:
lessThan: 7.0(3)F3(5), status: affected, version: unspecified, versionType: custom
}
{
product: Nexus 7000 and 7700 Series Switches
vendor: Cisco
versions:
lessThan: 6.2(22), status: affected, version: unspecified, versionType: custom
lessThan: 8.2(3), status: affected, version: unspecified, versionType: custom
}
{
product: Nexus 9000 Series Switches in Standalone NX-OS Mode
vendor: Cisco
versions:
lessThan: 7.0(3)I4(9), status: affected, version: unspecified, versionType: custom
lessThan: 7.0(3)I7(4), status: affected, version: unspecified, versionType: custom
}
{
product: Nexus 9500 R-Series Line Cards and Fabric Modules
vendor: Cisco
versions:
lessThan: 7.0(3)F3(5), status: affected, version: unspecified, versionType: custom
}
{
product: UCS 6200, 6300, and 6400 Fabric Interconnects
vendor: Cisco
versions:
lessThan: 3.2(3j), status: affected, version: unspecified, versionType: custom
lessThan: 4.0(2a), status: affected, version: unspecified, versionType: custom
}
metrics:
cvssV3_0: [
attackComplexity: LOW
attackVector: NETWORK
availabilityImpact: HIGH
baseScore: 8.6
baseSeverity: HIGH
confidentialityImpact: NONE
integrityImpact: NONE
privilegesRequired: NONE
scope: CHANGED
userInteraction: NONE
vectorString: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
version: 3.0
]
exploits: The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory.