Horizon Alert
Summary of the vulnerability and why it matters
A flaw exists in the PROFINET Discovery and Configuration Protocol (PN-DCP) implementation within Cisco IOS software. This weakness could permit an unauthenticated, remote attacker to trigger a device reload. Such an event would disrupt service, leading to a denial-of-service condition for affected organizations.
- Vulnerable Cisco IOS software
- Improper parsing of network traffic
- Denial of service to business operations
Attack Path
How an attacker could exploit the issue
This vulnerability impacts organizations using specific Cisco IOS versions for PROFINET communication. An unauthenticated attacker can exploit this by sending specially crafted network packets. Successful exploitation can cause affected devices to reload, leading to a denial-of-service condition and disruption of services.
- Network exposure required.
- Attacker sends crafted packets.
- Device reloads; denial of service.
Live Threat
Current exploitation, exposure, and threat context
This vulnerability could allow an attacker to cause a denial of service on affected Cisco devices. The impact is limited to device reloads, disrupting operations. The vulnerability affects Cisco devices configured to process PROFINET messages.
- Likely attacker skill level: Low
- Required access or conditions: Network access
- Business risk or urgency: Moderate
Priority actions
Operational Fix
Recommended remediation, mitigation, and detection steps
The identified vulnerability could allow an unauthenticated, remote attacker to cause a denial of service by triggering a device reload. This impacts organizations by disrupting operations and potentially leading to system downtime. The vulnerability arises from improper parsing of specific network protocol packets.
- Find assets using the affected protocol.
- Limit network access to these assets.
- Apply vendor updates and verify.
- Monitor for related activity.
