CVE-2017-12237

HIGH

7.5

CVSS Score

Published: September 28, 2017 at 07:00 AM UTC

Updated: June 17, 2026 at 01:02 AM UTC

301 products affected across 1 vendorIOSIOS XeAsr 1002-x

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Severity

HIGH7.5

Exploitation

CISA KEV

Exploit prediction

EPSS 7%

SSVC

Active

Actively Exploited

CISA Known Exploited Vulnerabilities (KEV) Catalog

EPSS Score7.1%

EPSS (Exploit Prediction Scoring System) estimates a 7.1% chance this CVE is exploited in the wild within the next 30 days — higher than 94% of all CVEs. It complements CVSS: a high EPSS on a mid-severity CVE can still be urgent.

A vulnerability in the Internet Key Exchange Version 2 (IKEv2) module of Cisco IOS and Cisco IOS XE 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.

Required Action

Apply updates per vendor instructions.

Ransomware Use

Unknown

Added to KEV

Mar 3, 2022

Remediation Due

Mar 24, 2022

1678 days overdue

Notes

https://nvd.nist.gov/vuln/detail/CVE-2017-12237

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

IOS · Cisconpm

95%

15.0 ≤ v ≤ 15.6

cisco-1000-integrated-services-router (environment) · cisco-1100-4g-6g-integrated-services-router (environment) · cisco-1100-4g-integrated-services-router (environment) · cisco-1100-4gltegb-integrated-services-router (environment) · cisco-1100-4gltena-integrated-services-router (environment) · cisco-1100-4p-integrated-services-router (environment) · cisco-1100-6g-integrated-services-router (environment) · cisco-1100-8p-integrated-services-router (environment) · cisco-1100-integrated-services-router (environment) · cisco-1100-lte-integrated-services-router (environment) · cisco-1101-4p-integrated-services-router (environment) · cisco-1101-integrated-services-router (environment) · cisco-1109-2p-integrated-services-router (environment) · cisco-1109-4p-integrated-services-router (environment) · cisco-1109-integrated-services-router (environment) · cisco-1111x-8p-integrated-services-router (environment) · cisco-1111x-integrated-services-router (environment) · cisco-1120-integrated-services-router (environment) · cisco-1131-integrated-services-router (environment) · cisco-1160-integrated-services-router (environment) · cisco-1240-connected-grid-router (environment) · cisco-1801-integrated-service-router (environment) · cisco-1802-integrated-service-router (environment) · cisco-1803-integrated-service-router (environment) · cisco-1811-integrated-service-router (environment) · cisco-1812-integrated-service-router (environment) · cisco-1841-integrated-service-router (environment) · cisco-1861-integrated-service-router (environment) · cisco-1905-integrated-services-router (environment) · cisco-1906c-integrated-services-router (environment) · cisco-1921-integrated-services-router (environment) · cisco-1941-integrated-services-router (environment) · cisco-1941w-integrated-services-router (environment) · cisco-4000-integrated-services-router (environment) · cisco-422-integrated-services-router (environment) · cisco-4221-integrated-services-router (environment) · cisco-4321-integrated-services-router (environment) · cisco-4321-k9-integrated-services-router (environment) · cisco-4321-k9-rf-integrated-services-router (environment) · cisco-4321-k9-ws-integrated-services-router (environment) · cisco-4331-integrated-services-router (environment) · cisco-4331-k9-integrated-services-router (environment) · cisco-4331-k9-rf-integrated-services-router (environment) · cisco-4331-k9-ws-integrated-services-router (environment) · cisco-4351-integrated-services-router (environment) · cisco-4351-k9-integrated-services-router (environment) · cisco-4351-k9-rf-integrated-services-router (environment) · cisco-4351-k9-ws-integrated-services-router (environment) · cisco-4431-integrated-services-router (environment) · cisco-44461-integrated-services-router (environment) · cisco-4451-integrated-services-router (environment) · cisco-4451-x-integrated-services-router (environment) · cisco-4461-integrated-services-router (environment) · cisco-8101-32fh (environment) · cisco-8101-32h (environment) · cisco-8102-64h (environment) · cisco-8201 (environment) · cisco-8201-32fh (environment) · cisco-8202 (environment) · cisco-8208 (environment) · cisco-8212 (environment) · cisco-8218 (environment) · cisco-8800-12-slot (environment) · cisco-8800-18-slot (environment) · cisco-8800-4-slot (environment) · cisco-8800-8-slot (environment) · cisco-8804 (environment) · cisco-8808 (environment) · cisco-8812 (environment) · cisco-8818 (environment) · cisco-8831 (environment) · cisco-9800-40 (environment) · cisco-9800-80 (environment) · cisco-9800-cl (environment) · cisco-9800-l (environment) · cisco-asr-1000 (environment) · cisco-asr-1000-x (environment) · cisco-asr-1001 (environment) · cisco-asr-1001-hx (environment) · cisco-asr-1001-hx-r (environment) · cisco-asr-1001-x (environment) · cisco-asr-1001-x-r (environment) · cisco-asr-1002 (environment) · cisco-asr-1002-hx (environment) · cisco-asr-1002-hx-r (environment) · cisco-asr-1002-x (environment) · cisco-asr-1002-x-r (environment) · cisco-asr-1004 (environment) · cisco-asr-1006 (environment) · cisco-asr-1006-x (environment) · cisco-asr-1009-x (environment) · cisco-asr-1013 (environment) · cisco-asr-1023 (environment) · cisco-catalyst-3650 (environment) · cisco-catalyst-3650-12x48fd-e (environment) · cisco-catalyst-3650-12x48fd-l (environment) · cisco-catalyst-3650-12x48fd-s (environment) · cisco-catalyst-3650-12x48uq (environment) · cisco-catalyst-3650-12x48uq-e (environment) · cisco-catalyst-3650-12x48uq-l (environment) · cisco-catalyst-3650-12x48uq-s (environment) · cisco-catalyst-3650-12x48ur (environment) · cisco-catalyst-3650-12x48ur-e (environment) · cisco-catalyst-3650-12x48ur-l (environment) · cisco-catalyst-3650-12x48ur-s (environment) · cisco-catalyst-3650-12x48uz (environment) · cisco-catalyst-3650-12x48uz-e (environment) · cisco-catalyst-3650-12x48uz-l (environment) · cisco-catalyst-3650-12x48uz-s (environment) · cisco-catalyst-3650-24pd (environment) · cisco-catalyst-3650-24pd-e (environment) · cisco-catalyst-3650-24pd-l (environment) · cisco-catalyst-3650-24pd-s (environment) · cisco-catalyst-3650-24pdm (environment) · cisco-catalyst-3650-24pdm-e (environment) · cisco-catalyst-3650-24pdm-l (environment) · cisco-catalyst-3650-24pdm-s (environment) · cisco-catalyst-3650-24ps-e (environment) · cisco-catalyst-3650-24ps-l (environment) · cisco-catalyst-3650-24ps-s (environment) · cisco-catalyst-3650-24td-e (environment) · cisco-catalyst-3650-24td-l (environment) · cisco-catalyst-3650-24td-s (environment) · cisco-catalyst-3650-24ts-e (environment) · cisco-catalyst-3650-24ts-l (environment) · cisco-catalyst-3650-24ts-s (environment) · cisco-catalyst-3650-48fd-e (environment) · cisco-catalyst-3650-48fd-l (environment) · cisco-catalyst-3650-48fd-s (environment) · cisco-catalyst-3650-48fq (environment) · cisco-catalyst-3650-48fq-e (environment) · cisco-catalyst-3650-48fq-l (environment) · cisco-catalyst-3650-48fq-s (environment) · cisco-catalyst-3650-48fqm (environment) · cisco-catalyst-3650-48fqm-e (environment) · cisco-catalyst-3650-48fqm-l (environment) · cisco-catalyst-3650-48fqm-s (environment) · cisco-catalyst-3650-48fs-e (environment) · cisco-catalyst-3650-48fs-l (environment) · cisco-catalyst-3650-48fs-s (environment) · cisco-catalyst-3650-48pd-e (environment) · cisco-catalyst-3650-48pd-l (environment) · cisco-catalyst-3650-48pd-s (environment) · cisco-catalyst-3650-48pq-e (environment) · cisco-catalyst-3650-48pq-l (environment) · cisco-catalyst-3650-48pq-s (environment) · cisco-catalyst-3650-48ps-e (environment) · cisco-catalyst-3650-48ps-l (environment) · cisco-catalyst-3650-48ps-s (environment) · cisco-catalyst-3650-48td-e (environment) · cisco-catalyst-3650-48td-l (environment) · cisco-catalyst-3650-48td-s (environment) · cisco-catalyst-3650-48tq-e (environment) · cisco-catalyst-3650-48tq-l (environment) · cisco-catalyst-3650-48tq-s (environment) · cisco-catalyst-3650-48ts-e (environment) · cisco-catalyst-3650-48ts-l (environment) · cisco-catalyst-3650-48ts-s (environment) · cisco-catalyst-3650-8x24pd-e (environment) · cisco-catalyst-3650-8x24pd-l (environment) · cisco-catalyst-3650-8x24pd-s (environment) · cisco-catalyst-3650-8x24uq (environment) · cisco-catalyst-3650-8x24uq-e (environment) · cisco-catalyst-3650-8x24uq-l (environment) · cisco-catalyst-3650-8x24uq-s (environment) · cisco-catalyst-3850 (environment) · cisco-catalyst-3850-12s-e (environment) · cisco-catalyst-3850-12s-s (environment) · cisco-catalyst-3850-12x48u (environment) · cisco-catalyst-3850-12xs-e (environment) · cisco-catalyst-3850-12xs-s (environment) · cisco-catalyst-3850-16xs-e (environment) · cisco-catalyst-3850-16xs-s (environment) · cisco-catalyst-3850-24p-e (environment) · cisco-catalyst-3850-24p-l (environment) · cisco-catalyst-3850-24p-s (environment) · cisco-catalyst-3850-24pw-s (environment) · cisco-catalyst-3850-24s-e (environment) · cisco-catalyst-3850-24s-s (environment) · cisco-catalyst-3850-24t-e (environment) · cisco-catalyst-3850-24t-l (environment) · cisco-catalyst-3850-24t-s (environment) · cisco-catalyst-3850-24u (environment) · cisco-catalyst-3850-24u-e (environment) · cisco-catalyst-3850-24u-l (environment) · cisco-catalyst-3850-24u-s (environment) · cisco-catalyst-3850-24xs (environment) · cisco-catalyst-3850-24xs-e (environment) · cisco-catalyst-3850-24xs-s (environment) · cisco-catalyst-3850-24xu (environment) · cisco-catalyst-3850-24xu-e (environment) · cisco-catalyst-3850-24xu-l (environment) · cisco-catalyst-3850-24xu-s (environment) · cisco-catalyst-3850-32xs-e (environment) · cisco-catalyst-3850-32xs-s (environment) · cisco-catalyst-3850-48f-e (environment) · cisco-catalyst-3850-48f-l (environment) · cisco-catalyst-3850-48f-s (environment) · cisco-catalyst-3850-48p-e (environment) · cisco-catalyst-3850-48p-l (environment) · cisco-catalyst-3850-48p-s (environment) · cisco-catalyst-3850-48pw-s (environment) · cisco-catalyst-3850-48t-e (environment) · cisco-catalyst-3850-48t-l (environment) · cisco-catalyst-3850-48t-s (environment) · cisco-catalyst-3850-48u (environment) · cisco-catalyst-3850-48u-e (environment) · cisco-catalyst-3850-48u-l (environment) · cisco-catalyst-3850-48u-s (environment) · cisco-catalyst-3850-48xs (environment) · cisco-catalyst-3850-48xs-e (environment) · cisco-catalyst-3850-48xs-f-e (environment) · cisco-catalyst-3850-48xs-f-s (environment) · cisco-catalyst-3850-48xs-s (environment) · cisco-catalyst-3850-nm-2-40g (environment) · cisco-catalyst-3850-nm-8-10g (environment) · cisco-catalyst-8200 (environment) · cisco-catalyst-8300 (environment) · cisco-catalyst-8300-1n1s-4t2x (environment) · cisco-catalyst-8300-1n1s-6t (environment) · cisco-catalyst-8300-2n2s-4t2x (environment) · cisco-catalyst-8300-2n2s-6t (environment) · cisco-catalyst-8500 (environment) · cisco-catalyst-8500-4qc (environment) · cisco-catalyst-8500l (environment) · cisco-catalyst-8510csr (environment) · cisco-catalyst-8510msr (environment) · cisco-catalyst-8540csr (environment) · cisco-catalyst-8540msr (environment) · cisco-catalyst-9200 (environment) · cisco-catalyst-9200cx (environment) · cisco-catalyst-9200l (environment) · cisco-catalyst-9300 (environment) · cisco-catalyst-9300-24p-a (environment) · cisco-catalyst-9300-24p-e (environment) · cisco-catalyst-9300-24s-a (environment) · cisco-catalyst-9300-24s-e (environment) · cisco-catalyst-9300-24t-a (environment) · cisco-catalyst-9300-24t-e (environment) · cisco-catalyst-9300-24u-a (environment) · cisco-catalyst-9300-24u-e (environment) · cisco-catalyst-9300-24ux-a (environment) · cisco-catalyst-9300-24ux-e (environment) · cisco-catalyst-9300-48p-a (environment) · cisco-catalyst-9300-48p-e (environment) · cisco-catalyst-9300-48s-a (environment) · cisco-catalyst-9300-48s-e (environment) · cisco-catalyst-9300-48t-a (environment) · cisco-catalyst-9300-48t-e (environment) · cisco-catalyst-9300-48u-a (environment) · cisco-catalyst-9300-48u-e (environment) · cisco-catalyst-9300-48un-a (environment) · cisco-catalyst-9300-48un-e (environment) · cisco-catalyst-9300-48uxm-a (environment) · cisco-catalyst-9300-48uxm-e (environment) · cisco-catalyst-9300l (environment) · cisco-catalyst-9300l-24p-4g-a (environment) · cisco-catalyst-9300l-24p-4g-e (environment) · cisco-catalyst-9300l-24p-4x-a (environment) · cisco-catalyst-9300l-24p-4x-e (environment) · cisco-catalyst-9300l-24t-4g-a (environment) · cisco-catalyst-9300l-24t-4g-e (environment) · cisco-catalyst-9300l-24t-4x-a (environment) · cisco-catalyst-9300l-24t-4x-e (environment) · cisco-catalyst-9300l-48p-4g-a (environment) · cisco-catalyst-9300l-48p-4g-e (environment) · cisco-catalyst-9300l-48p-4x-a (environment) · cisco-catalyst-9300l-48p-4x-e (environment) · cisco-catalyst-9300l-48t-4g-a (environment) · cisco-catalyst-9300l-48t-4g-e (environment) · cisco-catalyst-9300l-48t-4x-a (environment) · cisco-catalyst-9300l-48t-4x-e (environment) · cisco-catalyst-9300l-stack (environment) · cisco-catalyst-9300lm (environment) · cisco-catalyst-9300x (environment) · cisco-catalyst-9400 (environment) · cisco-catalyst-9400-supervisor-engine-1 (environment) · cisco-catalyst-9407r (environment) · cisco-catalyst-9410r (environment) · cisco-catalyst-9500 (environment) · cisco-catalyst-9500h (environment) · cisco-catalyst-9600 (environment) · cisco-catalyst-9600-supervisor-engine-1 (environment) · cisco-catalyst-9600x (environment) · cisco-catalyst-9800 (environment) · cisco-catalyst-9800-cl (environment) · cisco-catalyst-9800-l (environment) · cisco-catalyst-9800-l-c (environment) · cisco-catalyst-9800-l-f (environment) · cisco-catalyst-ie3200-rugged-switch (environment) · cisco-catalyst-ie3300-rugged-switch (environment) · cisco-catalyst-ie3400-heavy-duty-switch (environment) · cisco-catalyst-ie3400-rugged-switch (environment) · cisco-catalyst-ie9300 (environment) · cisco-cbr-8-converged-broadband-router (environment) · cisco-esr-6300-con-k9 (environment) · cisco-esr-6300-ncp-k9 (environment) · cisco-esr6300 (environment) · cisco-integrated-services-virtual-router (same device)

IOS Xe · Cisco

95%

3.5.0e ≤ v ≤ 16.5

1000 Integrated Services Router · Ciscodevice

80%

All versions

1100-4G/6G Integrated Services Router · Ciscodevice

80%

All versions

1100-4G Integrated Services Router · Ciscodevice

80%

All versions