A vulnerability with the handling of MPLS traffic for Cisco...

8.6 CVSS

Vulnerability 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.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

No credits recorded in the NVD database.

References

https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ipv6-mpls-dos-R9ycXkwM

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Affected Vendor

Cisco

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Affected Software

Cisco NX-OS Software

Vulnerable Versions:

6.0(2)A3(1), 6.0(2)A3(2), 6.0(2)A3(4), 6.0(2)A4(1), 6.0(2)A4(2), 6.0(2)A4(3), 6.0(2)A4(4), 6.0(2)A4(5), 6.0(2)A4(6), 6.0(2)A6(1), 6.0(2)A6(1a), 6.0(2)A6(2), 6.0(2)A6(2a), 6.0(2)A6(3), 6.0(2)A6(3a), 6.0(2)A6(4), 6.0(2)A6(4a), 6.0(2)A6(5), 6.0(2)A6(5a), 6.0(2)A6(5b), 6.0(2)A6(6), 6.0(2)A6(7), 6.0(2)A6(8), 6.0(2)A7(1), 6.0(2)A7(1a), 6.0(2)A7(2), 6.0(2)A7(2a), 6.0(2)A8(1), 6.0(2)A8(2), 6.0(2)A8(3), 6.0(2)A8(4), 6.0(2)A8(4a), 6.0(2)A8(5), 6.0(2)A8(6), 6.0(2)A8(7), 6.0(2)A8(7a), 6.0(2)A8(7b), 6.0(2)A8(8), 6.0(2)A8(9), 6.0(2)A8(10a), 6.0(2)A8(10), 6.0(2)A8(11), 6.0(2)A8(11a), 6.0(2)A8(11b), 6.0(2)U2(1), 6.0(2)U2(2), 6.0(2)U2(3), 6.0(2)U2(4), 6.0(2)U2(5), 6.0(2)U2(6), 6.0(2)U3(1), 6.0(2)U3(2), 6.0(2)U3(3), 6.0(2)U3(4), 6.0(2)U3(5), 6.0(2)U3(6), 6.0(2)U3(7), 6.0(2)U3(8), 6.0(2)U3(9), 6.0(2)U4(1), 6.0(2)U4(2), 6.0(2)U4(3), 6.0(2)U4(4), 6.0(2)U5(1), 6.0(2)U5(2), 6.0(2)U5(3), 6.0(2)U5(4), 6.0(2)U6(1), 6.0(2)U6(2), 6.0(2)U6(3), 6.0(2)U6(4), 6.0(2)U6(5), 6.0(2)U6(6), 6.0(2)U6(7), 6.0(2)U6(8), 6.0(2)U6(1a), 6.0(2)U6(2a), 6.0(2)U6(3a), 6.0(2)U6(4a), 6.0(2)U6(5a), 6.0(2)U6(5b), 6.0(2)U6(5c), 6.0(2)U6(9), 6.0(2)U6(10), 6.2(2), 6.2(2a), 6.2(6), 6.2(6b), 6.2(8), 6.2(8a), 6.2(8b), 6.2(10), 6.2(12), 6.2(18), 6.2(16), 6.2(14), 6.2(6a), 6.2(20), 6.2(20a), 6.2(22), 6.2(24), 6.2(24a), 7.0(3)F1(1), 7.0(3)F2(1), 7.0(3)F2(2), 7.0(3)F3(1), 7.0(3)F3(2), 7.0(3)F3(3), 7.0(3)F3(3a), 7.0(3)F3(4), 7.0(3)F3(3c), 7.0(3)F3(5), 7.0(3)I2(2a), 7.0(3)I2(2b), 7.0(3)I2(2c), 7.0(3)I2(2d), 7.0(3)I2(2e), 7.0(3)I2(3), 7.0(3)I2(4), 7.0(3)I2(5), 7.0(3)I2(1), 7.0(3)I2(1a), 7.0(3)I2(2), 7.0(3)I3(1), 7.0(3)I4(1), 7.0(3)I4(2), 7.0(3)I4(3), 7.0(3)I4(4), 7.0(3)I4(5), 7.0(3)I4(6), 7.0(3)I4(7), 7.0(3)I4(8), 7.0(3)I4(8a), 7.0(3)I4(8b), 7.0(3)I4(8z), 7.0(3)I4(9), 7.0(3)I5(1), 7.0(3)I5(2), 7.0(3)I6(1), 7.0(3)I6(2), 7.0(3)I7(1), 7.0(3)I7(2), 7.0(3)I7(3), 7.0(3)I7(4), 7.0(3)I7(5), 7.0(3)I7(5a), 7.0(3)I7(6), 7.0(3)I7(7), 7.0(3)I7(8), 7.0(3)I7(9), 7.0(3)I7(10), 7.1(0)N1(1a), 7.1(0)N1(1b), 7.1(0)N1(1), 7.1(1)N1(1), 7.1(2)N1(1), 7.1(3)N1(1), 7.1(3)N1(2), 7.1(4)N1(1), 7.1(5)N1(1), 7.1(5)N1(1b), 7.2(0)D1(1), 7.2(1)D1(1), 7.2(2)D1(2), 7.2(2)D1(1), 7.3(0)D1(1), 7.3(0)DX(1), 7.3(0)N1(1), 9.2(1), 9.2(2), 9.2(2t), 9.2(3), 9.2(4), 9.2(2v), 9.3(1), 9.3(2), 9.3(3), 9.3(4), 9.3(5), 9.3(6), 9.3(7), 9.3(7a), 9.3(8), 9.3(9), 9.3(10), 9.3(11), 9.3(12), 10.1(1), 10.1(2), 10.1(2t), 10.2(1), 10.2(1q), 10.2(2), 10.2(3), 10.2(3t), 10.2(4), 10.2(5), 10.2(3v), 10.2(6), 10.3(1), 10.3(2), 10.3(3), 10.3(99w), 10.3(99x), 10.4(1)