Improper Authentication in Cisco IOS XE - CVE-2019-12643
Published: September 2, 2019
Vulnerability identifier: #VU20494
CSH Severity: High
CVSS v4: 9.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2019-12643
CWE-ID: CWE-287
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to bypass authentication process.
The vulnerability exists due to an improper check performed by the area of code that manages the REST API authentication service. A remote attacker can submit malicious HTTP requests to the targeted device, obtain the token-id of an authenticated user, bypass authentication and execute privileged actions through the interface of the REST API virtual service container.
This vulnerability affects the following devices that are configured to use a vulnerable version of Cisco REST API virtual service container:
- Cisco 4000 Series Integrated Services Routers
- Cisco ASR 1000 Series Aggregation Services Routers
- Cisco Cloud Services Router 1000V Series
- Cisco Integrated Services Virtual Router
Affected software
Cisco IOS XE
How to mitigate CVE-2019-12643
Install updates from vendor's website.
Cisco IOS XE - update to 16.6.6