CVE-2019-1851: Cisco Identity Services Engine Arbitrary Client Certificate Creation Vulnerability
First published: Wed May 15 2019(Updated: )
A vulnerability in the External RESTful Services (ERS) API of the Cisco Identity Services Engine (ISE) could allow an authenticated, remote attacker to generate arbitrary certificates signed by the Internal Certificate Authority (CA) Services on ISE. This vulnerability is due to an incorrect implementation of role-based access control (RBAC). An attacker could exploit this vulnerability by crafting a specific HTTP request with administrative credentials. A successful exploit could allow the attacker to generate a certificate that is signed and trusted by the ISE CA with arbitrary attributes. The attacker could use this certificate to access other networks or assets that are protected by certificate authentication.
Credit: ykramarz@cisco.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Cisco Identity Services Engine | =2.2\(0.470\) | |
| Cisco Identity Services Engine | =2.3\(0.298\) | |
| Cisco Identity Services Engine | =2.4\(0.357\) |
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Reference Links
Frequently Asked Questions
What is CVE-2019-1851?
CVE-2019-1851 is a vulnerability in the External RESTful Services (ERS) API of the Cisco Identity Services Engine (ISE).
How does CVE-2019-1851 impact Cisco Identity Services Engine?
CVE-2019-1851 allows an authenticated, remote attacker to generate arbitrary certificates signed by the Internal Certificate Authority (CA) Services on ISE.
What is the severity of CVE-2019-1851?
The severity of CVE-2019-1851 is medium with a CVSS score of 6.8.
How can I fix CVE-2019-1851?
To fix CVE-2019-1851, Cisco recommends upgrading to a fixed software release.
Where can I find more information about CVE-2019-1851?
You can find more information about CVE-2019-1851 on the Cisco Security Advisory and SecurityFocus websites.
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- canonical/cisco identity services engine
- version/cisco identity services engine/2.2\(0.470\)
- version/cisco identity services engine/2.3\(0.298\)
- version/cisco identity services engine/2.4\(0.357\)