peter bassill · operator
$ cve CVE-2017-12237 JSON

CVE-2017-12237 KEV

7.5
HIGH · CVSS 3.1 · EPSS 7.1% (pctl 94)

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

CVSS7.5 (HIGH, v3.1)
VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS7.07% — more likely to be exploited than 94% of all CVEs
WeaknessCWE-399
On CISA KEVyes — remediate by 2022-03-24
Public exploitnone known
Published2017-09-29
Last modified2026-06-17

CISA KEV

NameCisco IOS and IOS XE Software Internet Key Exchange Denial-of-Service Vulnerability
Added2022-03-03
Due2022-03-24
Vendor / productCisco / IOS and IOS XE Software
Ransomware usenone reported

Affected (40)

VendorProduct
cisco1000 integrated services router
cisco1100 integrated services router
cisco1100-4g integrated services router
cisco1100-4g\/6g integrated services router
cisco1100-4gltegb integrated services router
cisco1100-4gltena integrated services router
cisco1100-4p integrated services router
cisco1100-6g integrated services router
cisco1100-8p integrated services router
cisco1100-lte integrated services router
cisco1101 integrated services router
cisco1101-4p integrated services router
cisco1109 integrated services router
cisco1109-2p integrated services router
cisco1109-4p integrated services router
cisco1111x integrated services router
cisco1111x-8p integrated services router
cisco1120 integrated services router
cisco1131 integrated services router
cisco1160 integrated services router
cisco1240 connected grid router
cisco1801 integrated service router
cisco1802 integrated service router
cisco1803 integrated service router
cisco1811 integrated service router
cisco1812 integrated service router
cisco1841 integrated service router
cisco1861 integrated service router
cisco1905 integrated services router
cisco1906c integrated services router
cisco1921 integrated services router
cisco1941 integrated services router
cisco1941w integrated services router
cisco4000 integrated services router
cisco422 integrated services router
cisco4221 integrated services router
cisco4321\/k9-rf integrated services router
cisco4321\/k9-ws integrated services router
ciscoios
ciscoios xe

References

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