CVE-2019-1729: Cisco NX-OS Software Arbitrary File Overwrite Vulnerability
First published: Wed May 15 2019(Updated: )
A vulnerability in the CLI implementation of a specific command used for image maintenance for Cisco NX-OS Software could allow an authenticated, local attacker to overwrite any file on the file system including system files. These file overwrites by the attacker are accomplished at the root privilege level. The vulnerability occurs because there is no verification of user-input parameters and or digital-signature verification for image files when using a specific CLI command. An attacker could exploit this vulnerability by authenticating to the device and issuing a command at the CLI. Because an exploit could allow the attacker to overwrite any file on the disk, including system files, a denial of service (DoS) condition could occur. The attacker must have valid administrator credentials for the affected device to exploit this vulnerability.
Credit: ykramarz@cisco.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Cisco Nx-os | <7.0\(3\)i4\(9\) | |
| Cisco Nx-os | >=7.0\(3\)i7<7.0\(3\)i7\(4\) | |
| Cisco Nexus 3000 | ||
| Cisco Nexus 3100 | ||
| Cisco Nexus 3100-z | ||
| Cisco Nexus 3100v | ||
| Cisco Nexus 3200 | ||
| Cisco Nexus 3400 | ||
| Cisco Nexus 3500 | ||
| Cisco Nexus 3524-x | ||
| Cisco Nexus 3524-xl | ||
| Cisco Nexus 3548-x | ||
| Cisco Nexus 3548-xl | ||
| Cisco Nexus 9000 | ||
| Cisco Nexus 9200 | ||
| Cisco Nexus 9300 | ||
| Cisco Nx-os | >=7.0\(3\)<7.0\(3\)f3\(5\) | |
| Cisco Nexus 36180yc-r | ||
| Cisco Nexus 3636c-r | ||
| Cisco Nexus 9504 | ||
| Cisco Nexus 9508 | ||
| Cisco Nexus 9516 |
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Reference Links
Frequently Asked Questions
What is CVE-2019-1729?
CVE-2019-1729 is a vulnerability in the CLI implementation of a specific command used for image maintenance for Cisco NX-OS Software.
What is the severity of CVE-2019-1729?
CVE-2019-1729 has a severity level of medium (6 out of 10).
How does CVE-2019-1729 affect Cisco devices?
CVE-2019-1729 affects devices running Cisco NX-OS Software versions 7.0(3)i4(9) to 7.0(3)i7(4).
How can an attacker exploit CVE-2019-1729?
An authenticated, local attacker can exploit CVE-2019-1729 to overwrite any file on the file system, including system files.
Is Cisco Nexus 3000 affected by CVE-2019-1729?
No, Cisco Nexus 3000 is not vulnerable to CVE-2019-1729.
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- agent/references
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- source/MITRE
- agent/last-modified-date
- agent/title
- agent/weakness
- agent/author
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- agent/tags
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- agent/first-publish-date
- agent/event
- vendor/cisco
- canonical/cisco nx-os
- 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 3524-x
- canonical/cisco nexus 3524-xl
- canonical/cisco nexus 3548-x
- canonical/cisco nexus 3548-xl
- canonical/cisco nexus 9000
- canonical/cisco nexus 9200
- canonical/cisco nexus 9300
- version/cisco nx-os/7.0\(3\)
- canonical/cisco nexus 36180yc-r
- canonical/cisco nexus 3636c-r
- canonical/cisco nexus 9504
- canonical/cisco nexus 9508
- canonical/cisco nexus 9516