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CVE-2018-0369: A vulnerability in the reassembly logic for fragmented IPv4 packets of Cisco StarOS running on virtual plat...

A vulnerability in the reassembly logic for fragmented IPv4 packets of Cisco StarOS running on virtual platforms could allow an unauthenticated, remote attacker to trigger a reload of the npusim process, resulting in a denial of service (DoS) condition. There are four instances of the npusim process running per Service Function (SF) instance, each handling a subset of all traffic flowing across the device. It is possible to trigger a reload of all four instances of the npusim process around the same time. The vulnerability is due to improper handling of fragmented IPv4 packets containing options. An attacker could exploit this vulnerability by sending a malicious IPv4 packet across an affected device. An exploit could allow the attacker to trigger a restart of the npusim process, which will result in all traffic queued toward this instance of the npusim process to be dropped while the process is restarting. The npusim process typically restarts within less than a second. This vulnerability affects: Cisco Virtualized Packet Core-Single Instance (VPC-SI), Cisco Virtualized Packet Core-Distributed Instance (VPC-DI), Cisco Ultra Packet Core (UPC). Cisco Bug IDs: CSCvh29613.

UnknownCVSS not scoredNot KEV-listedUpdated
Glexia's TakeAutomated analysis

Security readout for executives and security teams

CVE-2018-0369 is a denial-of-service issue in Cisco StarOS virtual packet core platforms. A remote unauthenticated attacker could cause traffic-handling processes to restart, briefly dropping queued traffic. The sources do not show code execution, data theft, or confirmed active exploitation. Exposure appears limited to Cisco Virtualized Packet Core-Single Instance, Virtualized Packet Core-Distributed Instance, and Ultra Packet Core running Cisco StarOS on virtual platforms. Practical exposure depends on whether fragmented IPv4 traffic can traverse affected packet-core service functions. Treat this as a targeted availability risk for Cisco virtual packet core environments. It is not presented as a data breach or takeover issue, but packet loss in core network functions can affect service reliability. Prioritize validation and Cisco-guided remediation for production carrier or customer-facing deployments. Mitigation focus: Check Cisco advisory cisco-sa-20180711-staros-dos for affected releases and vendor fixes.; Prioritize StarOS virtual packet core systems carrying customer or production traffic.; Restrict unnecessary fragmented IPv4 traffic exposure where operationally safe and vendor-supported..

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CVE-2018-0369 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

CVSS and timeline data

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Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
n/aCisco StarOS unknownCisco StarOS unknownListed
Weakness

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Improper Input Validation

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