CVE-2017-12235
Published: March 3, 2022
Official Description
A vulnerability in the implementation of the PROFINET Discovery and Configuration Protocol (PN-DCP) for Cisco IOS could allow an unauthenticated, remote attacker to cause an affected device to reload, resulting in a denial of service.
CISA KEV Advisory
Cisco IOS Software for Cisco Industrial Ethernet Switches PROFINET Denial-of-Service Vulnerability
A vulnerability in the implementation of the PROFINET Discovery and Configuration Protocol (PN-DCP) for Cisco IOS could allow an unauthenticated, remote attacker to cause an affected device to reload, resulting in a denial of service.
Apply updates per vendor instructions.
Risk Analysis
This Cisco IOS vulnerability in the PROFINET Discovery and Configuration Protocol (PN-DCP) allows an unauthenticated, remote attacker to cause a device reload, leading to a denial of service. Its presence in the KEV catalog confirms active exploitation, highlighting its urgency.
This vulnerability is actively being exploited in the wild. The flaw is remotely exploitable and does not require authentication.
Administrators should apply the latest security updates for Cisco IOS to mitigate this denial-of-service vulnerability.
Technical Analysis
CVE-2017-12235 requires local access, meaning attackers must already have a foothold on the target system.
Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.
CISA has added CVE-2017-12235 to the Known Exploited Vulnerabilities (KEV) catalog, confirming active exploitation in the wild. U.S. federal agencies are required to patch this within the mandated timeframe, and all organizations should treat remediation as urgent.
Affected Vendors & Products
Exploit & PoC Resources
All References (1)
Quick Facts
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2017-12235 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
- !CISA KEV: Federal agencies must patch per BOD 22-01 timeline
- !Active exploitation confirmed — treat as P1