high
7.2
CWE
347
Advisory Published
Updated

CVE-2019-1728: Cisco FXOS and NX-OS Software Secure Configuration Bypass Vulnerability

First published: Wed May 15 2019(Updated: )

A vulnerability in the Secure Configuration Validation functionality of Cisco FXOS Software and Cisco NX-OS Software could allow an authenticated, local attacker to run arbitrary commands at system boot time with the privileges of root. The vulnerability is due to a lack of proper validation of system files when the persistent configuration information is read from the file system. An attacker could exploit this vulnerability by authenticating to the device and overwriting the persistent configuration storage with malicious executable files. An exploit could allow the attacker to run arbitrary commands at system startup and those commands will run as the root user. The attacker must have valid administrative credentials for the device.

Credit: ykramarz@cisco.com

Affected SoftwareAffected VersionHow to fix
Cisco NX-OS>=8.1<8.1\(1b\)
Cisco NX-OS>=8.2<8.3\(1\)
Cisco MDS 9000 Series Multilayer Switches
Cisco MDS 9100
Cisco MDS 9200
Cisco MDS 9500
Cisco MDS 9700
Cisco NX-OS>=7.0\(3\)i7<7.0\(3\)i7\(3\)
Cisco Nexus 3000
Cisco Nexus 3100 Firmware
Cisco Nexus 3100-Z firmware
Cisco Nexus 3100V Firmware
Cisco Nexus 3200
Cisco Nexus 3400 Firmware
Cisco Nexus 3500 Platform
Cisco Nexus 3600 Firmware
Cisco Nexus 9000 Firmware
Cisco Nexus 9200 firmware
Cisco Nexus 9300 Firmware
Cisco Nexus 9500 Series
Cisco NX-OS>=6.0\(2\)a8<6.0\(2\)a8\(11\)
Cisco NX-OS>=7.0\(3\)<7.0\(3\)i7\(3\)
Cisco Nexus 3524-xl
Cisco Nexus 3524-XL Firmware
Cisco Nexus 3548-X/XL
Cisco Nexus 3548-X/XL
Cisco NX-OS>=7.3<7.3\(4\)n1\(1\)
Cisco NX-OS for Nexus 5500 Platform Switches
Cisco Nexus 5600 Firmware
Cisco Nexus 6000 firmware
Cisco NX-OS>=6.2<6.2\(22\)
Cisco NX-OS>=7.2<7.3\(3\)d1\(1\)
Cisco NX-OS>=8.0<8.3\(1\)
Cisco Nexus 7000
Cisco Nexus 7700 series
Cisco NX-OS>=4.0<4.0\(1a\)
Cisco UCS 6248UP
Cisco UCS 6296UP
Cisco UCS 6332
Cisco UCS 6324
Cisco UCS 6332-16UP Fabric Interconnect
Cisco NX-OS>=2.4<2.4.1.101
Cisco Firepower 4110 Next-Generation Firewall
Cisco Firepower 4115
Cisco Firepower 4120 Next-Generation Firewall
Cisco Firepower 4125 firmware
Cisco Firepower 4140 Next-Generation Firewall
Cisco Firepower 4145 firmware
Cisco Firepower 4150 Next-Generation Firewall
Cisco Firepower 9300 firmware

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Reference Links

Frequently Asked Questions

  • What is CVE-2019-1728?

    CVE-2019-1728 is a vulnerability in the Secure Configuration Validation functionality of Cisco FXOS Software and Cisco NX-OS Software.

  • What is the severity of CVE-2019-1728?

    The severity of CVE-2019-1728 is high with a CVSS score of 6.7.

  • How does CVE-2019-1728 affect Cisco NX-OS software?

    CVE-2019-1728 affects Cisco NX-OS software versions 6.0(2)a8 to 8.1(1b) and versions 8.2 to 8.3(1).

  • Is Cisco MDS 9000 affected by CVE-2019-1728?

    No, Cisco MDS 9000 is not affected by CVE-2019-1728.

  • How can I fix CVE-2019-1728?

    To fix CVE-2019-1728, Cisco recommends upgrading to a fixed software release.

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