cisco-sa-20190828-nxos-api-dos: Cisco NX-OS Software NX-API Denial of Service Vulnerability
First published: Wed Aug 28 2019(Updated: )
A vulnerability in the NX-API feature of Cisco NX-OS Software could allow an unauthenticated, remote attacker to cause an NX-API system process to unexpectedly restart. The vulnerability is due to incorrect validation of the HTTP header of a request that is sent to the NX-API. An attacker could exploit this vulnerability by sending a crafted HTTP request to the NX-API on an affected device. A successful exploit could allow the attacker to cause a denial of service (DoS) condition in the NX-API service; however, the NX-OS device itself would still be available and passing network traffic. Note: The NX-API feature is disabled by default. Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability. This advisory is available at the following link: https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190828-nxos-api-dos
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Cisco NX-OS Software | ||
| Cisco NX-OS Software | =6.0(2)A8<6.0(2)A8(11a) | 6.0(2)A8(11a) |
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Reference Links
Frequently Asked Questions
What is the Cisco NX-OS Software NX-API Denial of Service vulnerability?
The Cisco NX-OS Software NX-API Denial of Service vulnerability is a security flaw in the NX-API feature of Cisco NX-OS Software that allows an unauthenticated attacker to cause an NX-API system process to unexpectedly restart.
How does the Cisco NX-OS Software NX-API Denial of Service vulnerability occur?
The vulnerability occurs due to incorrect validation of the HTTP header of a request sent to the NX-API.
What is the severity of the Cisco NX-OS Software NX-API Denial of Service vulnerability?
The severity of the Cisco NX-OS Software NX-API Denial of Service vulnerability is medium, with a severity value of 5.3.
Which software versions are affected by the Cisco NX-OS Software NX-API Denial of Service vulnerability?
The Cisco NX-OS Software versions affected by the vulnerability include 6.0(2)A8 up to 6.0(2)A8(11a).
Is there a fix available for the Cisco NX-OS Software NX-API Denial of Service vulnerability?
No specific fix information is available at the moment. It is recommended to follow the recommendations provided by Cisco in their security advisory.
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