Cisco IOS/IOS XE/IOS XR Messages input validation

Summaryinfo

A vulnerability classified as critical was found in Cisco IOS, IOS XE and IOS XR. This impacts an unknown function of the component Topology Discovery Service of Cisco One Platform Kit. Such manipulation as part of Messages leads to input validation. This vulnerability is traded as CVE-2020-3217. Access to the local network is required for this attack to succeed. There is no exploit available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Cisco IOS, IOS XE and IOS XR (Router Operating System) (version unknown). Affected by this issue is an unknown function of the component Topology Discovery Service of Cisco One Platform Kit. The manipulation as part of a Messages 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 confidentiality, integrity, and availability. CVE summarizes:

A vulnerability in the Topology Discovery Service of Cisco One Platform Kit (onePK) in Cisco IOS Software, Cisco IOS XE Software, Cisco IOS XR Software, and Cisco NX-OS Software could allow an unauthenticated, adjacent attacker to execute arbitrary code or cause a denial of service (DoS) condition on an affected device. The vulnerability is due to insufficient length restrictions when the onePK Topology Discovery Service parses Cisco Discovery Protocol messages. An attacker could exploit this vulnerability by sending a malicious Cisco Discovery Protocol message to an affected device. An exploit could allow the attacker to cause a stack overflow, which could allow the attacker to execute arbitrary code with administrative privileges, or to cause a process crash, which could result in a reload of the device and cause a DoS condition.

The weakness was shared 06/03/2020 as cisco-sa-ios-nxos-onepk-rce-6H as confirmed advisory (Website). The advisory is shared for download at tools.cisco.com. This vulnerability is handled as CVE-2020-3217 since 12/12/2019. The attack needs to approached within the local network. No form of authentication is required for exploitation. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 06/04/2020).

Upgrading eliminates this vulnerability.

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Productinfo

Type

• Router Operating System

Vendor

• Cisco

Name

• IOS
• IOS XE
• IOS XR

License

• commercial

Website

• Vendor: https://www.cisco.com/

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