Cisco NX-OS 7.2(1)D(1)/7.2(2)D1(1)/7.2(2)D1(2) Request resource management

Summaryinfo

A vulnerability was found in Cisco NX-OS 7.2(1)D(1)/7.2(2)D1(1)/7.2(2)D1(2). It has been classified as problematic. This issue affects some unknown processing. Performing a manipulation as part of Request results in resource management. This vulnerability is known as CVE-2018-0102. Access to the local network is required for this attack. No exploit is available. It is suggested to use restrictive firewalling.

Detailsinfo

A vulnerability, which was classified as problematic, was found in Cisco NX-OS 7.2(1)D(1)/7.2(2)D1(1)/7.2(2)D1(2) (Router Operating System). This affects an unknown code block. The manipulation as part of a Request leads to a resource management vulnerability. CWE is classifying the issue as CWE-399. This is going to have an impact on availability. The summary by CVE is:

A vulnerability in the Pong tool of Cisco NX-OS Software could allow an unauthenticated, adjacent attacker to cause a reload of an affected device, resulting in a denial of service (DoS) condition. The vulnerability exists because the affected software attempts to free the same area of memory twice. An attacker could exploit this vulnerability by sending a pong request to an affected device from a location on the network that causes the pong reply packet to egress both a FabricPath port and a non-FabricPath port. An exploit could allow the attacker to cause a dual or quad supervisor virtual port-channel (vPC) to reload. This vulnerability affects the following products when running Cisco NX-OS Software Release 7.2(1)D(1), 7.2(2)D1(1), or 7.2(2)D1(2) with both the Pong and FabricPath features enabled and the FabricPath port is actively monitored via a SPAN session: Cisco Nexus 7000 Series Switches and Cisco Nexus 7700 Series Switches. Cisco Bug IDs: CSCuv98660.

The bug was discovered 01/17/2018. The weakness was published 01/18/2018 with Cisco (Website). It is possible to read the advisory at securitytracker.com. This vulnerability is uniquely identified as CVE-2018-0102 since 11/27/2017. Access to the local network is required for this attack. No form of authentication is needed for exploitation. The technical details are unknown and an exploit is not publicly available.

The vulnerability was handled as a non-public zero-day exploit for at least 1 days. During that time the estimated underground price was around $5k-$25k.

It is possible to mitigate the weakness by firewalling .

The vulnerability is also documented in the vulnerability database at SecurityFocus (BID 102728†). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

• Router Operating System

Vendor

• Cisco

Name

• NX-OS

Version

• 7.2(1)D(1)
• 7.2(2)D1(1)
• 7.2(2)D1(2)

License

• commercial

Website

• Vendor: https://www.cisco.com/

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Be aware that VulDB is the high quality source for vulnerability data.

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