CVE-2019-12643 — CRITICAL (10.0)

Vulnerability Description

A vulnerability in the Cisco REST API virtual service container for Cisco IOS XE Software could allow an unauthenticated, remote attacker to bypass authentication on the managed Cisco IOS XE device. The vulnerability is due to an improper check performed by the area of code that manages the REST API authentication service. An attacker could exploit this vulnerability by submitting malicious HTTP requests to the targeted device. A successful exploit could allow the attacker to obtain the token-id of an authenticated user. This token-id could be used to bypass authentication and execute privileged actions through the interface of the REST API virtual service container on the affected Cisco IOS XE device. The REST API interface is not enabled by default and must be installed and activated separately on IOS XE devices. See the Details section for more information.

CVSS Score

10.0

CRITICAL

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

CHANGED

Confidentiality

HIGH

Integrity

HIGH

Availability

HIGH

Affected Products

Vendor	Product	Versions
Cisco	Ios Xe	15.5\(3\)s3.16
Cisco	4221 Integrated Services Router	-
Cisco	4321 Integrated Services Router	-
Cisco	4331 Integrated Services Router	-
Cisco	4351 Integrated Services Router	-
Cisco	4431 Integrated Services Router	-
Cisco	4451-X Integrated Services Router	-
Cisco	Cloud Services Router 1000V	-

Related Weaknesses (CWE)

CWE-287

References

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-2Vendor Advisory
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-2Vendor Advisory

FAQ

What is CVE-2019-12643?

CVE-2019-12643 is a vulnerability with a CVSS score of 10.0 (CRITICAL). A vulnerability in the Cisco REST API virtual service container for Cisco IOS XE Software could allow an unauthenticated, remote attacker to bypass authentication on the managed Cisco IOS XE device. T...

How severe is CVE-2019-12643?

CVE-2019-12643 has been rated CRITICAL with a CVSS base score of 10.0/10. This is considered a critical vulnerability requiring immediate attention.

Is there a patch for CVE-2019-12643?

Check the references section above for vendor advisories and patch information. Affected products include: Cisco Ios Xe, Cisco 4221 Integrated Services Router, Cisco 4321 Integrated Services Router, Cisco 4331 Integrated Services Router, Cisco 4351 Integrated Services Router.