Cisco NX-OS prior 7.0(3)I7(4) CLI command injection

Summaryinfo

A vulnerability has been found in Cisco NX-OS and classified as critical. Affected by this issue is some unknown functionality of the component CLI. The manipulation leads to command injection. This vulnerability is documented as CVE-2019-1610. The attack needs to be performed locally. There is not any exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in Cisco NX-OS (Router Operating System). It has been rated as critical. This issue affects an unknown part of the component CLI. The manipulation with an unknown input leads to a command injection vulnerability. Using CWE to declare the problem leads to CWE-77. The product constructs all or part of a command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended command when it is sent to a downstream component. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

A vulnerability in the CLI of Cisco NX-OS Software could allow an authenticated, local attacker to execute arbitrary commands on the underlying operating system of an affected device. The vulnerability is due to insufficient validation of arguments passed to certain CLI commands. An attacker could exploit this vulnerability by including malicious input as the argument of an affected command. A successful exploit could allow the attacker to execute arbitrary commands on the underlying operating system with elevated privileges. An attacker would need valid administrator credentials to exploit this vulnerability. Nexus 3500 Platform Switches and Nexus 3000 Series Switches software versions prior to 7.0(3)I7(4) are affected.

The bug was discovered 03/06/2019. The weakness was released 03/11/2019 as cisco-sa-20190306-nxos-cmdinj- as confirmed advisory (Website). The advisory is shared at tools.cisco.com. The identification of this vulnerability is CVE-2019-1610 since 12/06/2018. An attack has to be approached locally. A simple authentication is necessary for exploitation. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1202 for this issue.

The vulnerability was handled as a non-public zero-day exploit for at least 5 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 316418 (Cisco NX-OS Software CLI Command Injection Vulnerability (CVE-2019-1610)(cisco-sa-20190306-nxos-cmdinj-1610)).

Upgrading to version 7.0(3)I7(4) eliminates this vulnerability.

Entries connected to this vulnerability are available at VDB-131502, VDB-131503, VDB-131504 and VDB-131505. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

• Router Operating System

Vendor

• Cisco

Name

• NX-OS

License

• commercial

Website

• Vendor: https://www.cisco.com/

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CPE 2.2info

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Entryinfo

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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