CVE-2017-12237 KEV
Patch first
On CISA KEV — known exploited in the wild, due 2022-03-24.
Description
A vulnerability in the Internet Key Exchange Version 2 (IKEv2) module of Cisco IOS 15.0 through 15.6 and Cisco IOS XE 3.5 through 16.5 could allow an unauthenticated, remote attacker to cause high CPU utilization, traceback messages, or a reload of an affected device that leads to a denial of service (DoS) condition. The vulnerability is due to how an affected device processes certain IKEv2 packets. An attacker could exploit this vulnerability by sending specific IKEv2 packets to an affected device to be processed. A successful exploit could allow the attacker to cause high CPU utilization, traceback messages, or a reload of the affected device that leads to a DoS condition. This vulnerability affects Cisco devices that have the Internet Security Association and Key Management Protocol (ISAKMP) enabled. Although only IKEv2 packets can be used to trigger this vulnerability, devices that are running Cisco IOS Software or Cisco IOS XE Software are vulnerable when ISAKMP is enabled. A device does not need to be configured with any IKEv2-specific features to be vulnerable. Many features use IKEv2, including different types of VPNs such as the following: LAN-to-LAN VPN; Remote-access VPN, excluding SSL VPN; Dynamic Multipoint VPN (DMVPN); and FlexVPN. Cisco Bug IDs: CSCvc41277.
Scoring
| CVSS | 7.5 (HIGH, v3.1) |
|---|---|
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| EPSS | 7.07% — more likely to be exploited than 94% of all CVEs |
| Weakness | CWE-399 |
| On CISA KEV | yes — remediate by 2022-03-24 |
| Public exploit | none known |
| Published | 2017-09-29 |
| Last modified | 2026-06-17 |
CISA KEV
| Name | Cisco IOS and IOS XE Software Internet Key Exchange Denial-of-Service Vulnerability |
|---|---|
| Added | 2022-03-03 |
| Due | 2022-03-24 |
| Vendor / product | Cisco / IOS and IOS XE Software |
| Ransomware use | none reported |
Affected (40)
| Vendor | Product |
|---|---|
| cisco | 1000 integrated services router |
| cisco | 1100 integrated services router |
| cisco | 1100-4g integrated services router |
| cisco | 1100-4g\/6g integrated services router |
| cisco | 1100-4gltegb integrated services router |
| cisco | 1100-4gltena integrated services router |
| cisco | 1100-4p integrated services router |
| cisco | 1100-6g integrated services router |
| cisco | 1100-8p integrated services router |
| cisco | 1100-lte integrated services router |
| cisco | 1101 integrated services router |
| cisco | 1101-4p integrated services router |
| cisco | 1109 integrated services router |
| cisco | 1109-2p integrated services router |
| cisco | 1109-4p integrated services router |
| cisco | 1111x integrated services router |
| cisco | 1111x-8p integrated services router |
| cisco | 1120 integrated services router |
| cisco | 1131 integrated services router |
| cisco | 1160 integrated services router |
| cisco | 1240 connected grid router |
| cisco | 1801 integrated service router |
| cisco | 1802 integrated service router |
| cisco | 1803 integrated service router |
| cisco | 1811 integrated service router |
| cisco | 1812 integrated service router |
| cisco | 1841 integrated service router |
| cisco | 1861 integrated service router |
| cisco | 1905 integrated services router |
| cisco | 1906c integrated services router |
| cisco | 1921 integrated services router |
| cisco | 1941 integrated services router |
| cisco | 1941w integrated services router |
| cisco | 4000 integrated services router |
| cisco | 422 integrated services router |
| cisco | 4221 integrated services router |
| cisco | 4321\/k9-rf integrated services router |
| cisco | 4321\/k9-ws integrated services router |
| cisco | ios |
| cisco | ios xe |
References
- http://www.securityfocus.com/bid/101037
- http://www.securitytracker.com/id/1039460
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170927-ike
- http://www.securityfocus.com/bid/101037
- http://www.securitytracker.com/id/1039460
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170927-ike
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2017-12237
→ the Explorer · watch your stack · NVD