MediumCVE-2019-1611

Cisco FXOS and NX-OS Software CLI Command Injection Vulnerability (CVE-2019-1611)

Published 11.03.2019Sources: CVE.org

What is affected, what to do

Update Cisco Firepower 4100 Series Next-Generation Firewalls to version 2.2.2.91, Cisco Firepower 4100 Series Next-Generation Firewalls to version 2.3.1.110, Cisco Firepower 4100 Series Next-Generation Firewalls to version 2.4.1.222.

Affected: Cisco Firepower 4100 Series Next-Generation Firewalls lt *..2.2.2.91
Cisco Firepower 4100 Series Next-Generation Firewalls lt *..2.3.1.110
Cisco Firepower 4100 Series Next-Generation Firewalls lt *..2.4.1.222
Cisco Firepower 9300 Security Appliance lt *..2.2.2.91
Cisco Firepower 9300 Security Appliance lt *..2.3.1.110
Cisco Firepower 9300 Security Appliance lt *..2.4.1.222
Fixed in: Cisco Firepower 4100 Series Next-Generation Firewalls 2.2.2.91
Cisco Firepower 4100 Series Next-Generation Firewalls 2.3.1.110
Cisco Firepower 4100 Series Next-Generation Firewalls 2.4.1.222
Cisco Firepower 9300 Security Appliance 2.2.2.91
Cisco Firepower 9300 Security Appliance 2.3.1.110
Cisco Firepower 9300 Security Appliance 2.4.1.222

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Metrics

6.7

Priority

XIEM Effective CVSS: highest available CVSS rating from NVD and vendor data.

Source: NVD, CVSS v3

4.2

CVSS v3

Severity Medium on the scale from 0 to 10.

Source: CVE.org

0.4 %

EPSS score

Low — model estimates < 1% exploitation likelihood.

Source: FIRST EPSS, percentile 39.1

Show all metrics

Severity: Medium
Priority (0–325) The priority score is a consolidated metric that condenses several individual signals into a single, action-guiding ranking: technical severity (CVSS), exploitation likelihood (EPSS), known-exploited status (KEV) and the context of the affected asset. The aim is to answer the only truly important question in vulnerability management: what first? Read in glossary: 33.24 Methodology
Exploit maturity An exploit is code or a technique that specifically uses a concrete vulnerability to force unintended behaviour — such as executing code or escalating privileges. It is the tool that turns a theoretical flaw into a practical attack. Read in glossary: no public PoC known
XIEM Effective CVSS XIEM® is the tiered managed-security operating model from NEOSEC and a registered trademark of NEOSEC GmbH. It extends classic SIEM — the central collection, normalisation and correlation of security-relevant events — with endpoint forensics, network visibility and deception technology, and consolidates them into three building tiers: Sentry, Orchestrate and Command. Read in glossary: 6.7 Methodology
CVSS v3 CVSS is the globally established, open standard for assessing the technical severity of a vulnerability on a scale from 0 to 10. It describes how easily a flaw can be exploited and what damage it can cause — but not how likely its actual exploitation is. CVSS and the complementary EPSS deliberately answer different questions. Read in glossary: 4.2
EPSS score The EPSS score is the absolute model output for an individual vulnerability: the estimated probability of real-world exploitation within the next 30 days, expressed as a value between 0 and 1 (i.e. 0 % to 100 %). A score of 0.42 means „the model estimates a 42 % chance of real-world exploitation within 30 days“. Read in glossary: 0.4 %; Low — model estimates < 1% exploitation likelihood.
EPSS percentile The EPSS percentile is the relative position of a vulnerability within all EPSS-scored CVEs, expressed as a value between 0 and 1. A percentile of 0.90 means „this CVE has a higher EPSS score than 90 % of all other scored CVEs“. Unlike the EPSS score, it is not a probability — but a positioning within a ranking. Read in glossary: 39.1; High — this CVE ranks above the median of all CVEs scored today (rank ≥ 36%).
KEV status The KEV catalogue is a list maintained by the US authority CISA of vulnerabilities for which active exploitation in the wild has been confirmed. It answers not the question „how severe?“ but „is it already being attacked?“ — thereby sharply prioritising patching. Read in glossary: —
Published: 11.03.2019
CISA assessment (SSVC): Exploitation: none known · not automatable · Technical impact: partial; Source: CISA Vulnrichment, as of 21 November 2024
CWE CWE is a catalogue of typical weakness types in software and hardware — such as flawed input validation, unsafe memory handling or poor authentication. Where a CVE names a concrete vulnerability in a concrete product, a CWE describes the underlying class of defect. Read in glossary: CWE-77

Detection rules

No NEOSEC detection rule is available for this vulnerability yet.

Classification under NIS2 and CRA

Rule-based classification from exploitation status and severity. It does not replace a case-by-case assessment.

NIS2 NIS2 is EU Directive (EU) 2022/2555 to raise the level of cybersecurity across the Union. It substantially broadens obligations compared with the first NIS directive: more sectors, mandatory risk management, staged reporting duties and personal accountability of senior management. Read in glossary: Handle the vulnerability in regular vulnerability handling under Art. 21(2)(e) NIS2.
CRA The CRA is EU Regulation (EU) 2024/2847 setting horizontal cybersecurity requirements for „products with digital elements“ — from industrial controllers and software to connected consumer devices. For the first time manufacturers must ensure security across the entire product lifecycle, handle vulnerabilities and provide security updates. Read in glossary: From 11.12.2027, Annex I Part II CRA requires manufacturers of affected products with digital elements to handle vulnerabilities without delay and provide security updates.
ISO/IEC 27001 ISO/IEC 27001 is the internationally leading standard for an information security management system (ISMS). It describes a risk-based, process-oriented framework to systematically plan, implement, review and improve information security. Read in glossary: Control A.8.8, management of technical vulnerabilities: assess relevance to your systems, plan remediation and keep evidence.

Description

A vulnerability in the CLI of Cisco NX-OS Software and Cisco FXOS 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. Firepower 4100 Series Next-Generation Firewalls are affected running software versions prior to 2.2.2.91, 2.3.1.110, and 2.4.1.222. Firepower 9300 Security Appliance are affected running software versions prior to 2.2.2.91, 2.3.1.110, and 2.4.1.222. MDS 9000 Series Multilayer Switches are affected running software versions prior to 6.2(25) and 8.3(1). Nexus 3000 Series Switches are affected running software versions prior to 7.0(3)I4(9) and 7.0(3)I7(5). Nexus 3500 Platform Switches are affected running software versions prior to 7.0(3)I7(5). Nexus 3600 Platform Switches are affected running software versions prior to 7.0(3)F3(5). Nexus 2000, 5500, 5600, and 6000 Series Switches are affected running software versions prior to 7.1(5)N1(1b) and 7.3(4)N1(1). Nexus 7000 and 7700 Series Switches are affected running software versions prior to 6.2(22), 7.3(3)D1(1), 8.2(3). Nexus 9000 Series Switches in Standalone NX-OS Mode are affected running software versions prior to 7.0(3)I4(9) and 7.0(3)I7(5). Nexus 9500 R-Series Line Cards and Fabric Modules are affected running software versions prior to 7.0(3)F3(5).

Source: cvelistv5, NVD (NIST)

Affected products

The following versions are affected. Older releases of the same product line are also vulnerable unless stated otherwise.

Affected products
		Affected versions	Fixed in
Cisco	Firepower 4100 Series Next-Generation Firewalls	`< 2.4.1.222` `< 2.2.2.91` `< 2.3.1.110`	`2.4.1.222` `2.2.2.91` `2.3.1.110`
Cisco	Firepower 9300 Security Appliance	`< 2.4.1.222` `< 2.2.2.91` `< 2.3.1.110`	`2.4.1.222` `2.2.2.91` `2.3.1.110`
Cisco	MDS 9000 Series Multilayer Switches	`—`	—
Cisco	Nexus 2000, 5500, 5600, and 6000 Series Switches	`—`	—
Cisco	Nexus 3000 Series Switches	`—`	—
Cisco	Nexus 3500 Platform Switches	`—`	—
Cisco	Nexus 3600 Platform Switches	`—`	—
Cisco	Nexus 7000 and 7700 Series Switches	`—`	—
Cisco	Nexus 9000 Series Switches in Standalone NX-OS Mode	`—`	—
Cisco	Nexus 9500 R-Series Line Cards and Fabric Modules	`—`	—

Vendors and products

Affected operating systems

Affected operating systems

Other	cisco	fx-os	—
Other	cisco	nx-os	—

Weakness classes (CWE)

CWE-77Improper Neutralization of Special Elements used in a Command ('Command Injection')
Class
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.
Entry at MITRE CWE-77

References & sources

securityfocus.com107381Vulnerability database, x_refsource_BID
tools.cisco.com20190306 Cisco FXOS and NX-OS Software CLI Command Injection Vulnerability (CVE-2019-1611)Vendor advisory, x_refsource_CISCO

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<a href="https://intel.neosec.eu/en/cve/CVE-2019-1611"><img src="https://intel.neosec.eu/badge/cve/CVE-2019-1611.svg?lang=en" alt="CVE-2019-1611 – NEOSEC Intel" height="20"></a>