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CVE Record

CVE-2018-0273: A vulnerability in the IPsec Manager of Cisco StarOS for Cisco Aggregation Services Router (ASR) 5000 Serie...

A vulnerability in the IPsec Manager of Cisco StarOS for Cisco Aggregation Services Router (ASR) 5000 Series Routers and Virtualized Packet Core (VPC) System Software could allow an unauthenticated, remote attacker to terminate all active IPsec VPN tunnels and prevent new tunnels from being established, resulting in a denial of service (DoS) condition. The vulnerability is due to improper processing of corrupted Internet Key Exchange Version 2 (IKEv2) messages. An attacker could exploit this vulnerability by sending crafted IKEv2 messages toward an affected router. A successful exploit could allow the attacker to cause the ipsecmgr service to reload. A reload of this service could cause all IPsec VPN tunnels to be terminated and prevent new tunnels from being established until the service has restarted, resulting in a DoS condition. This vulnerability affects the following Cisco products when they are running Cisco StarOS: Cisco Aggregation Services Router (ASR) 5000 Series Routers, Virtualized Packet Core (VPC) System Software. Cisco Bug IDs: CSCve29605.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysis

Security readout for executives and security teams

This flaw can let an unauthenticated remote attacker disrupt IPsec VPN service on affected Cisco StarOS systems. A successful attack reloads the IPsec Manager service, drops active VPN tunnels, and blocks new tunnels until the service restarts. For operators using these platforms for carrier or enterprise connectivity, the main risk is outage, not data theft. Exposure is limited to organizations running Cisco StarOS on ASR 5000 Series Routers or Cisco Virtualized Packet Core software with IPsec/IKEv2 reachable from external or untrusted networks. Treat this as a high-priority availability risk if affected Cisco StarOS systems support production VPN connectivity. The business concern is service disruption across active IPsec tunnels, especially for carrier, mobile core, or critical partner connectivity. Mitigation focus: Check Cisco advisory guidance for fixed StarOS software or vendor-supported mitigations.; Prioritize remediation on internet-reachable or partner-reachable IKEv2/IPsec endpoints.; Limit IKEv2/IPsec exposure to expected peers where operationally feasible..

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Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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CVE-2018-0273 mapping review

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors
0Timeline events
0ADP providers
2Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
n/aCisco StarOS IPsec ManagerCisco StarOS IPsec ManagerListed
Weakness

CWE details

CWE-399

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.