Vulnerability Intelligence Report
Cisco IOS and XE Software Internet Key Exchange Version 1 Denial-of-Service Vulnerability
CVE-2018-0159
A vulnerability in the implementation of Internet Key Exchange Version 1 (IKEv1) functionality in Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause an affected device to reload, resulting in a denial of service (DoS) condition. The vulnerability is due to improper validation of specific IKEv1 packets. An attacker could exploit this vulnerability by sending crafted IKEv1 packets to an affected device during an IKE negotiation. A successful exploit could allow the attacker to cause an affected device to reload, resulting in a DoS condition. Cisco Bug IDs: CSCuj73916.
CISA KEV
SSVC: Active Exploitation
Automatable
CVSS Base Score
7.5
HIGH
Exploitability:3.9
Impact Score:3.6
EPSS Probability:6.87%
Executive Threat Verdict
Evaluating...
Evaluating Threat Landscape...
Assessing known weaponization, exploitation telemetry, and federal advisories.
Attack Surface
—
Authentication
—
Weaponization
—
SSVC Action
—
Weaknesses (CWE)
CWE-20 ↗CWE-20
Affected Products & Versions
| Vendor | Product | Affected Versions |
|---|---|---|
| cisco | ios | 15.3\(3\)s |
| cisco | asr_901-12c-f-d | all |
| cisco | asr_901-12c-ft-d | all |
| cisco | asr_901-4c-f-d | all |
| cisco | asr_901-4c-ft-d | all |
| cisco | asr_901-6cz-f-a | all |
| cisco | asr_901-6cz-f-d | all |
| cisco | asr_901-6cz-ft-a | all |
| cisco | asr_901-6cz-ft-d | all |
| cisco | me_3600x-24cx-m | all |
| cisco | me_3600x-24fs-m | all |
| cisco | me_3600x-24ts-m | all |
| cisco | me_3800x-24fs-m | all |
| cisco | ios_xe | 15.3\(3\)s |
References & Technical Advisories
No reference links found.
Threat Intelligence Signals
Identity & Timeline
| Status | PUBLISHED |
| Assigning Authority | Cisco Systems, Inc. · Hosted Service · USA |
| Reserved | 2017-11-27T00:00:00 |
| Published | 2018-03-28T22:00:00 |
| Patch Date | 2018-03-28 |
| Last Updated | 2026-01-12T21:55:25 |
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