Cisco NX-OS on Nexus 4000 SNMP Request input validation

Summaryinfo

A vulnerability identified as problematic has been detected in Cisco NX-OS on Nexus 4000. This affects an unknown function of the component SNMP. The manipulation as part of Request leads to input validation. This vulnerability is referenced as CVE-2018-0299. Remote exploitation of the attack is possible. No exploit is available. It is recommended to apply restrictive firewalling.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in Cisco NX-OS on Nexus 4000 (Router Operating System) (affected version not known). This issue affects some unknown functionality of the component SNMP. The manipulation as part of a Request leads to a input validation vulnerability. Using CWE to declare the problem leads to CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. Impacted is availability. The summary by CVE is:

A vulnerability in the Simple Network Management Protocol (SNMP) feature of Cisco NX-OS on the Cisco Nexus 4000 Series Switch could allow an authenticated, remote attacker to cause the device to unexpectedly reload, resulting in a denial of service (DoS) condition. The vulnerability is due to incomplete validation of an SNMP poll request for a specific MIB. An attacker could exploit this vulnerability by sending a specific SNMP poll request to the targeted device. An exploit could allow the attacker to cause the device to reload, resulting in a DoS condition. Cisco Bug IDs: CSCvg10442.

The bug was discovered 06/20/2018. The weakness was published 06/21/2018 as cisco-sa-20180620-n4k-snmp-dos / CSCvg10442 as confirmed advisory (Website). The advisory is shared at tools.cisco.com. The identification of this vulnerability is CVE-2018-0299 since 11/27/2017. The attack may be initiated remotely. A simple authentication is required for exploitation. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 03/28/2023).

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. The commercial vulnerability scanner Qualys is able to test this issue with plugin 316288 (Cisco Nexus 4000 Series Switch Simple Network Management Protocol Polling Denial of Service Vulnerability(cisco-sa-20180620-n4k-snmp-dos)).

Addressing this vulnerability is possible by firewalling .

Similar entry is available at VDB-119768. If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

• Router Operating System

Vendor

• Cisco

Name

• NX-OS

License

• commercial

Website

• Vendor: https://www.cisco.com/

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Entryinfo

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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