description: A vulnerability with the handling of MPLS traffic for Cisco NX-OS Software could allow an unauthenticated, remote attacker to cause the netstack process to unexpectedly restart, which could cause the device to stop processing network traffic or to reload.
This vulnerability is due to lack of proper error checking when processing an ingress MPLS frame. An attacker could exploit this vulnerability by sending a crafted IPv6 packet that is encapsulated within an MPLS frame to an MPLS-enabled interface of the targeted device. A successful exploit could allow the attacker to cause a denial of service (DoS) condition.
Note: The IPv6 packet can be generated multiple hops away from the targeted device and then encapsulated within MPLS. The DoS condition may occur when the NX-OS device processes the packet.
problem types: Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
affected:
{
vendor: Cisco
product: Cisco NX-OS Software
versions:
version: 6.0(2)A3(1), status: affected
version: 6.0(2)A3(2), status: affected
version: 6.0(2)A3(4), status: affected
version: 6.0(2)A4(1), status: affected
version: 6.0(2)A4(2), status: affected
version: 6.0(2)A4(3), status: affected
version: 6.0(2)A4(4), status: affected
version: 6.0(2)A4(5), status: affected
version: 6.0(2)A4(6), status: affected
version: 6.0(2)A6(1), status: affected
version: 6.0(2)A6(1a), status: affected
version: 6.0(2)A6(2), status: affected
version: 6.0(2)A6(2a), status: affected
version: 6.0(2)A6(3), status: affected
version: 6.0(2)A6(3a), status: affected
version: 6.0(2)A6(4), status: affected
version: 6.0(2)A6(4a), status: affected
version: 6.0(2)A6(5), status: affected
version: 6.0(2)A6(5a), status: affected
version: 6.0(2)A6(5b), status: affected
version: 6.0(2)A6(6), status: affected
version: 6.0(2)A6(7), status: affected
version: 6.0(2)A6(8), status: affected
version: 6.0(2)A7(1), status: affected
version: 6.0(2)A7(1a), status: affected
version: 6.0(2)A7(2), status: affected
version: 6.0(2)A7(2a), status: affected
version: 6.0(2)A8(1), status: affected
version: 6.0(2)A8(2), status: affected
version: 6.0(2)A8(3), status: affected
version: 6.0(2)A8(4), status: affected
version: 6.0(2)A8(4a), status: affected
version: 6.0(2)A8(5), status: affected
version: 6.0(2)A8(6), status: affected
version: 6.0(2)A8(7), status: affected
version: 6.0(2)A8(7a), status: affected
version: 6.0(2)A8(7b), status: affected
version: 6.0(2)A8(8), status: affected
version: 6.0(2)A8(9), status: affected
version: 6.0(2)A8(10a), status: affected
version: 6.0(2)A8(10), status: affected
version: 6.0(2)A8(11), status: affected
version: 6.0(2)A8(11a), status: affected
version: 6.0(2)A8(11b), status: affected
version: 6.0(2)U2(1), status: affected
version: 6.0(2)U2(2), status: affected
version: 6.0(2)U2(3), status: affected
version: 6.0(2)U2(4), status: affected
version: 6.0(2)U2(5), status: affected
version: 6.0(2)U2(6), status: affected
version: 6.0(2)U3(1), status: affected
version: 6.0(2)U3(2), status: affected
version: 6.0(2)U3(3), status: affected
version: 6.0(2)U3(4), status: affected
version: 6.0(2)U3(5), status: affected
version: 6.0(2)U3(6), status: affected
version: 6.0(2)U3(7), status: affected
version: 6.0(2)U3(8), status: affected
version: 6.0(2)U3(9), status: affected
version: 6.0(2)U4(1), status: affected
version: 6.0(2)U4(2), status: affected
version: 6.0(2)U4(3), status: affected
version: 6.0(2)U4(4), status: affected
version: 6.0(2)U5(1), status: affected
version: 6.0(2)U5(2), status: affected
version: 6.0(2)U5(3), status: affected
version: 6.0(2)U5(4), status: affected
version: 6.0(2)U6(1), status: affected
version: 6.0(2)U6(2), status: affected
version: 6.0(2)U6(3), status: affected
version: 6.0(2)U6(4), status: affected
version: 6.0(2)U6(5), status: affected
version: 6.0(2)U6(6), status: affected
version: 6.0(2)U6(7), status: affected
version: 6.0(2)U6(8), status: affected
version: 6.0(2)U6(1a), status: affected
version: 6.0(2)U6(2a), status: affected
version: 6.0(2)U6(3a), status: affected
version: 6.0(2)U6(4a), status: affected
version: 6.0(2)U6(5a), status: affected
version: 6.0(2)U6(5b), status: affected
version: 6.0(2)U6(5c), status: affected
version: 6.0(2)U6(9), status: affected
version: 6.0(2)U6(10), status: affected
version: 6.2(2), status: affected
version: 6.2(2a), status: affected
version: 6.2(6), status: affected
version: 6.2(6b), status: affected
version: 6.2(8), status: affected
version: 6.2(8a), status: affected
version: 6.2(8b), status: affected
version: 6.2(10), status: affected
version: 6.2(12), status: affected
version: 6.2(18), status: affected
version: 6.2(16), status: affected
version: 6.2(14), status: affected
version: 6.2(6a), status: affected
version: 6.2(20), status: affected
version: 6.2(20a), status: affected
version: 6.2(22), status: affected
version: 6.2(24), status: affected
version: 6.2(24a), status: affected
version: 7.0(3)F1(1), status: affected
version: 7.0(3)F2(1), status: affected
version: 7.0(3)F2(2), status: affected
version: 7.0(3)F3(1), status: affected
version: 7.0(3)F3(2), status: affected
version: 7.0(3)F3(3), status: affected
version: 7.0(3)F3(3a), status: affected
version: 7.0(3)F3(4), status: affected
version: 7.0(3)F3(3c), status: affected
version: 7.0(3)F3(5), status: affected
version: 7.0(3)I2(2a), status: affected
version: 7.0(3)I2(2b), status: affected
version: 7.0(3)I2(2c), status: affected
version: 7.0(3)I2(2d), status: affected
version: 7.0(3)I2(2e), status: affected
version: 7.0(3)I2(3), status: affected
version: 7.0(3)I2(4), status: affected
version: 7.0(3)I2(5), status: affected
version: 7.0(3)I2(1), status: affected
version: 7.0(3)I2(1a), status: affected
version: 7.0(3)I2(2), status: affected
version: 7.0(3)I3(1), status: affected
version: 7.0(3)I4(1), status: affected
version: 7.0(3)I4(2), status: affected
version: 7.0(3)I4(3), status: affected
version: 7.0(3)I4(4), status: affected
version: 7.0(3)I4(5), status: affected
version: 7.0(3)I4(6), status: affected
version: 7.0(3)I4(7), status: affected
version: 7.0(3)I4(8), status: affected
version: 7.0(3)I4(8a), status: affected
version: 7.0(3)I4(8b), status: affected
version: 7.0(3)I4(8z), status: affected
version: 7.0(3)I4(9), status: affected
version: 7.0(3)I5(1), status: affected
version: 7.0(3)I5(2), status: affected
version: 7.0(3)I6(1), status: affected
version: 7.0(3)I6(2), status: affected
version: 7.0(3)I7(1), status: affected
version: 7.0(3)I7(2), status: affected
version: 7.0(3)I7(3), status: affected
version: 7.0(3)I7(4), status: affected
version: 7.0(3)I7(5), status: affected
version: 7.0(3)I7(5a), status: affected
version: 7.0(3)I7(6), status: affected
version: 7.0(3)I7(7), status: affected
version: 7.0(3)I7(8), status: affected
version: 7.0(3)I7(9), status: affected
version: 7.0(3)I7(10), status: affected
version: 7.1(0)N1(1a), status: affected
version: 7.1(0)N1(1b), status: affected
version: 7.1(0)N1(1), status: affected
version: 7.1(1)N1(1), status: affected
version: 7.1(2)N1(1), status: affected
version: 7.1(3)N1(1), status: affected
version: 7.1(3)N1(2), status: affected
version: 7.1(4)N1(1), status: affected
version: 7.1(5)N1(1), status: affected
version: 7.1(5)N1(1b), status: affected
version: 7.2(0)D1(1), status: affected
version: 7.2(1)D1(1), status: affected
version: 7.2(2)D1(2), status: affected
version: 7.2(2)D1(1), status: affected
version: 7.3(0)D1(1), status: affected
version: 7.3(0)DX(1), status: affected
version: 7.3(0)N1(1), status: affected
version: 9.2(1), status: affected
version: 9.2(2), status: affected
version: 9.2(2t), status: affected
version: 9.2(3), status: affected
version: 9.2(4), status: affected
version: 9.2(2v), status: affected
version: 9.3(1), status: affected
version: 9.3(2), status: affected
version: 9.3(3), status: affected
version: 9.3(4), status: affected
version: 9.3(5), status: affected
version: 9.3(6), status: affected
version: 9.3(7), status: affected
version: 9.3(7a), status: affected
version: 9.3(8), status: affected
version: 9.3(9), status: affected
version: 9.3(10), status: affected
version: 9.3(11), status: affected
version: 9.3(12), status: affected
version: 10.1(1), status: affected
version: 10.1(2), status: affected
version: 10.1(2t), status: affected
version: 10.2(1), status: affected
version: 10.2(1q), status: affected
version: 10.2(2), status: affected
version: 10.2(3), status: affected
version: 10.2(3t), status: affected
version: 10.2(4), status: affected
version: 10.2(5), status: affected
version: 10.2(3v), status: affected
version: 10.2(6), status: affected
version: 10.3(1), status: affected
version: 10.3(2), status: affected
version: 10.3(3), status: affected
version: 10.3(99w), status: affected
version: 10.3(99x), status: affected
version: 10.4(1), status: affected
}
metrics:
format: cvssV3_1
cvssV3_1: [
version: 3.1
vectorString: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
baseScore: 8.6
baseSeverity: HIGH
attackVector: NETWORK
attackComplexity: LOW
privilegesRequired: NONE
userInteraction: NONE
scope: CHANGED
confidentialityImpact: NONE
integrityImpact: NONE
availabilityImpact: HIGH
]
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.