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 Software | Affected Version | How to fix |
|---|---|---|
| Cisco Nx-os | >=8.1<8.1\(1b\) | |
| Cisco Nx-os | >=8.2<8.3\(1\) | |
| Cisco MDS 9000 | ||
| 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 | ||
| Cisco Nexus 3100-z | ||
| Cisco Nexus 3100v | ||
| Cisco Nexus 3200 | ||
| Cisco Nexus 3400 | ||
| Cisco Nexus 3500 | ||
| Cisco Nexus 3600 | ||
| Cisco Nexus 9000 | ||
| Cisco Nexus 9200 | ||
| Cisco Nexus 9300 | ||
| Cisco Nexus 9500 | ||
| 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-x | ||
| Cisco Nexus 3524-xl | ||
| Cisco Nexus 3548-x | ||
| Cisco Nexus 3548-xl | ||
| Cisco Nx-os | >=7.3<7.3\(4\)n1\(1\) | |
| Cisco Nexus 5500 | ||
| Cisco Nexus 5600 | ||
| Cisco Nexus 6000 | ||
| 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 | ||
| Cisco Nx-os | >=4.0<4.0\(1a\) | |
| Cisco Ucs 6248up | ||
| Cisco Ucs 6296up | ||
| Cisco Ucs 6332 | ||
| Cisco Usc 6324 | ||
| Cisco Usc 6332-16up | ||
| Cisco Nx-os | >=2.4<2.4.1.101 | |
| Cisco Firepower 4110 | ||
| Cisco Firepower 4115 | ||
| Cisco Firepower 4120 | ||
| Cisco Firepower 4125 | ||
| Cisco Firepower 4140 | ||
| Cisco Firepower 4145 | ||
| Cisco Firepower 4150 | ||
| Cisco Firepower 9300 |
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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.
- collector/nvd-index
- agent/references
- agent/type
- agent/softwarecombine
- collector/mitre-cve
- source/MITRE
- agent/last-modified-date
- agent/title
- agent/weakness
- agent/author
- agent/severity
- agent/tags
- agent/description
- agent/first-publish-date
- agent/event
- vendor/cisco
- canonical/cisco nx-os
- version/cisco nx-os/8.1
- version/cisco nx-os/8.2
- canonical/cisco mds 9000
- canonical/cisco mds 9100
- canonical/cisco mds 9200
- canonical/cisco mds 9500
- canonical/cisco mds 9700
- version/cisco nx-os/7.0\(3\)i7
- canonical/cisco nexus 3000
- canonical/cisco nexus 3100
- canonical/cisco nexus 3100-z
- canonical/cisco nexus 3100v
- canonical/cisco nexus 3200
- canonical/cisco nexus 3400
- canonical/cisco nexus 3500
- canonical/cisco nexus 3600
- canonical/cisco nexus 9000
- canonical/cisco nexus 9200
- canonical/cisco nexus 9300
- canonical/cisco nexus 9500
- version/cisco nx-os/6.0\(2\)a8
- version/cisco nx-os/7.0\(3\)
- canonical/cisco nexus 3524-x
- canonical/cisco nexus 3524-xl
- canonical/cisco nexus 3548-x
- canonical/cisco nexus 3548-xl
- version/cisco nx-os/7.3
- canonical/cisco nexus 5500
- canonical/cisco nexus 5600
- canonical/cisco nexus 6000
- version/cisco nx-os/6.2
- version/cisco nx-os/7.2
- version/cisco nx-os/8.0
- canonical/cisco nexus 7000
- canonical/cisco nexus 7700
- version/cisco nx-os/4.0
- canonical/cisco ucs 6248up
- canonical/cisco ucs 6296up
- canonical/cisco ucs 6332
- canonical/cisco usc 6324
- canonical/cisco usc 6332-16up
- version/cisco nx-os/2.4
- canonical/cisco firepower 4110
- canonical/cisco firepower 4115
- canonical/cisco firepower 4120
- canonical/cisco firepower 4125
- canonical/cisco firepower 4140
- canonical/cisco firepower 4145
- canonical/cisco firepower 4150
- canonical/cisco firepower 9300