CVE-2019-12643
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.
EPSS 15.41% · 94.8th percentile
Risk Scores
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Cisco | Cisco IOS XE Software | unspecified |
| cisco | ios_xe | 15.5\(3\)s3.16, 16.6.5 |
| Cisco | N/A |
Exploit Intelligence
- 20190828 Cisco REST API Container for IOS XE Software Authentication Bypass Vulnerability (circl)
- ET EXPLOIT Cisco REST API Container for Cisco IOS XE Software Authentication Bypass - Successful Exploit (CVE-2019-12643) (emergingthreats)
- ET EXPLOIT Cisco REST API Container for Cisco IOS XE Software Authentication Bypass - Successful Exploit (CVE-2019-12643) (emergingthreats)
- ET EXPLOIT Possible Cisco REST API Container for Cisco IOS XE Software Authentication Bypass Attempt (CVE-2019-12643) (emergingthreats)
- ET EXPLOIT Possible Cisco REST API Container for Cisco IOS XE Software Authentication Bypass Attempt (CVE-2019-12643) (emergingthreats)
Timeline
- Aug 28, 2019 CVE Published
- Apr 14, 2021 EPSS Score
- Jan 6, 2022 EPSS Score
- Jan 28, 2022 PoC Published
- Feb 4, 2022 EPSS Score
- Apr 1, 2022 EPSS Score
- Mar 7, 2023 EPSS Score
- May 15, 2023 EPSS Score
- Oct 7, 2023 EPSS Score
- Jul 19, 2024 EPSS Score
- Nov 19, 2024 CVE Updated
- Mar 17, 2025 EPSS Score
References
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190828-nxos-ipv6-dos advisory
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190828-iosxe-rest-auth-bypass advisory
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190828-ucs-privescalation advisory
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190828-nxos-fsip-dos advisory
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190828-fxnxos-snmp-dos advisory
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190828-nxos-memleak-dos advisory
- https://nvd.nist.gov/vuln/detail/CVE-2019-12643 advisory