Cisco IOS XE prior CSCvb09542 CLI Parser Argument os command injection

Summaryinfo

A vulnerability was found in Cisco IOS XE. It has been rated as critical. This issue affects some unknown processing of the component CLI Parser. Performing a manipulation as part of Argument results in os command injection. This vulnerability is known as CVE-2018-0185. Attacking locally is a requirement. No exploit is available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability, which was classified as critical, was found in Cisco IOS XE (Router Operating System). This affects an unknown function of the component CLI Parser. The manipulation as part of a Argument leads to a os command injection vulnerability. CWE is classifying the issue as CWE-78. The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

Multiple vulnerabilities in the CLI parser of Cisco IOS XE Software could allow an authenticated, local attacker to inject arbitrary commands into the CLI of the affected software, which could allow the attacker to gain access to the underlying Linux shell of an affected device and execute commands with root privileges on the device. The vulnerabilities exist because the affected software does not sufficiently sanitize command arguments before passing commands to the Linux shell for execution. An attacker could exploit these vulnerabilities by submitting a malicious CLI command to the affected software. A successful exploit could allow the attacker to break from the CLI of the affected software, which could allow the attacker to gain access to the underlying Linux shell on an affected device and execute arbitrary commands with root privileges on the device. Cisco Bug IDs: CSCuz03145, CSCuz56419, CSCva31971, CSCvb09542.

The bug was discovered 03/28/2018. The weakness was published 03/28/2018 with Cisco as cisco-sa-20180328-cmdinj as confirmed advisory (Website). The advisory is shared at tools.cisco.com. This vulnerability is uniquely identified as CVE-2018-0185 since 11/27/2017. An attack has to be approached locally. The successful exploitation requires a authentication. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1202 for this issue.

The commercial vulnerability scanner Qualys is able to test this issue with plugin 316231 (Cisco IOS XE Software CLI Command Injection Vulnerabilities(cisco-sa-20180328-cmdinj)).

Upgrading to version CSCvb09542 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at SecurityFocus (BID 103547†). Similar entries are available at VDB-115182, VDB-115190 and VDB-115516. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

• Router Operating System

Vendor

• Cisco

Name

• IOS XE

License

• commercial

Website

• Vendor: https://www.cisco.com/

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Entryinfo

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

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