CVE-2018-0239

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.

• CWE-20
• CWE-770

• http://www.securityfocus.com/bid/103923Third Party Advisory, VDB Entry
• http://www.securitytracker.com/id/1040720Third Party Advisory, VDB Entry
• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180418-starosVendor Advisory
• http://www.securityfocus.com/bid/103923Third Party Advisory, VDB Entry
• http://www.securitytracker.com/id/1040720Third Party Advisory, VDB Entry
• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180418-starosVendor Advisory

Published

Apr 19, 2018

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
• PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
• AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.

• CVE-2018-0233A vulnerability in the Secure Sockets Layer (SSL) packet rea…
• CVE-2018-0234A vulnerability in the implementation of Point-to-Point Tunn…
• CVE-2018-0235A vulnerability in the 802.11 frame validation functionality…7.4
• CVE-2018-0236Rejected reason: DO NOT USE THIS CANDIDATE NUMBER. ConsultID…
• CVE-2018-0237A vulnerability in the file type detection mechanism of the …5.8
• CVE-2018-0238A vulnerability in the role-based resource checking function…
• CVE-2018-0240Multiple vulnerabilities in the Application Layer Protocol I…8.6
• CVE-2018-0241A vulnerability in the UDP broadcast forwarding function of …
• CVE-2018-0242A vulnerability in the WebVPN web-based management interface…
• CVE-2018-0243A vulnerability in the detection engine of Cisco Firepower S…5.8
• CVE-2018-0244A vulnerability in the detection engine of Cisco Firepower S…5.8
• CVE-2018-0245A vulnerability in the REST API of Cisco 5500 and 8500 Serie…5.3