CVE-2018-0239

HIGH

Cisco StarOS - Unauthenticated Interface Forwarding Denial of Service via Crafted IP Packet

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2018-0239. PoCs published by tpdlshdmlrkfmcla.

AI-analyzed exploit summary The repository contains only a README.md with minimal content, lacking any exploit code or technical details. It appears to be a placeholder or stub for CVE-2018-0239.

Description

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.

Exploits (1)

nomisec STUB
by tpdlshdmlrkfmcla · poc
https://github.com/tpdlshdmlrkfmcla/CVE-2018-0239

The repository contains only a README.md with minimal content, lacking any exploit code or technical details. It appears to be a placeholder or stub for CVE-2018-0239.

Classification
Stub 10%
Attack Type
Other
Complexity
Trivial
Reliability
Theoretical
Target: unknown
No auth needed
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (3)

Core 3
Core References
Third Party Advisory, VDB Entry vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/103923
Third Party Advisory, VDB Entry vdb-entry x_refsource_sectrack
http://www.securitytracker.com/id/1040720

Scores

CVSS v3 7.5
EPSS 0.0349
EPSS Percentile 87.6%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
Technical Impact partial

Details

CWE
CWE-20 CWE-770
Status published
Products (5)
cisco/staros 21.0.v0.65819
cisco/staros 21.0.v4
cisco/staros 21.1.v6
cisco/staros 21.3.1
cisco/staros 21.4.0
Published Apr 19, 2018
Tracked Since Feb 18, 2026