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CVE Record

CVE-2018-0239: A vulnerability in the egress packet processing functionality of the Cisco StarOS operating system for Cisc...

A vulnerability in the egress packet processing functionality of the Cisco StarOS operating system for Cisco Aggregation Services Router (ASR) 5700 Series devices and Virtualized Packet Core (VPC) System Software could allow an unauthenticated, remote attacker to cause an interface on the device to cease forwarding packets. The device may need to be manually reloaded to clear this Interface Forwarding Denial of Service condition. The vulnerability is due to the failure to properly check that the length of a packet to transmit does not exceed the maximum supported length of the network interface card (NIC). An attacker could exploit this vulnerability by sending a crafted IP packet or a series of crafted IP fragments through an interface on the targeted device. A successful exploit could allow the attacker to cause the network interface to cease forwarding packets. This vulnerability could be triggered by either IPv4 or IPv6 network traffic. This vulnerability affects the following Cisco products when they are running the StarOS operating system and a virtual interface card is installed on the device: Aggregation Services Router (ASR) 5700 Series, Virtualized Packet Core-Distributed Instance (VPC-DI) System Software, Virtualized Packet Core-Single Instance (VPC-SI) System Software. Cisco Bug IDs: CSCvf32385.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysis

Security readout for executives and security teams

This flaw can let a remote, unauthenticated attacker disrupt packet forwarding on affected Cisco StarOS systems. For mobile or packet-core environments, the business risk is service interruption. The source bundle does not provide CVSS scoring, confirmed exploitation, or exact fixed versions. Exposure is likely limited to Cisco ASR 5700 Series and Cisco VPC-DI or VPC-SI systems running StarOS with a virtual interface card installed. Treat this as a service-availability risk for affected Cisco packet-core infrastructure. Prioritize confirmation and vendor-guided remediation where outages would affect customer traffic or critical connectivity. Mitigation focus: Review Cisco advisory cisco-sa-20180418-staros for vendor-approved fixed release guidance.; Identify affected StarOS deployments with virtual interface cards installed.; Prioritize remediation for packet-core or transit systems carrying untrusted IPv4 or IPv6 traffic..

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CVE-2018-0239 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

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

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Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
n/aCisco StarOSCisco StarOSListed
Weakness

CWE details

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