A vulnerability in the implementation of the PROFINET Discovery and Configuration Protocol (PN-DCP) for Cisco IOS 12.2 through 15.6 could al
Affects Cisco IOS 12.2 through 15.6 devices configured to process PROFINET messages; PROFINET is enabled by default from 12.2(52)SE. No fix is listed in the checked facts.
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Listed in CISA KEV
- How many real-world setups can hit the bug, from the vendor's advisory and CISA data. It does not know your setup.What do these mean? →
- Actively exploited
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
Summary
Cisco IOS software versions 12.2 through 15.6 is affected when it processes PROFINET Discovery and Configuration Protocol (PN-DCP) traffic, which is enabled by default on certain Cisco switches starting with Release 12.2(52)SE. An unauthenticated remote attacker can send specially crafted discovery packets that cause the affected device to reload, resulting in a denial of service.
Summarized by anthropic/claude-haiku-5.5. Verify details against the original sources.
Read the original description
A vulnerability in the implementation of the PROFINET Discovery and Configuration Protocol (PN-DCP) for Cisco IOS 12.2 through 15.6 could allow an unauthenticated, remote attacker to cause an affected device to reload, resulting in a denial of service (DoS) condition. The vulnerability is due to the improper parsing of ingress PN-DCP Identify Request packets destined to an affected device. An attacker could exploit this vulnerability by sending a crafted PN-DCP Identify Request packet to an affected device and then continuing to send normal PN-DCP Identify Request packets to the device. A successful exploit could allow the attacker to cause the affected device to reload, resulting in a DoS condition. This vulnerability affects Cisco devices that are configured to process PROFINET messages. Beginning with Cisco IOS Software Release 12.2(52)SE, PROFINET is enabled by default on all the base switch module and expansion-unit Ethernet ports. Cisco Bug IDs: CSCuz47179.
Timeline
- CVE published
- Added to CISA KEV
CISA has evidence of exploitation in the wild
- CISA remediation deadline
Due date for US federal agencies to patch
- Record last updated
Affected versions
- n/a Cisco IOS
Cisco IOS
References 3
securityfocus.com
securitytracker.com
Questions about CVE-2017-12235
What does this mean?
The PN-DCP implementation can cause an affected device to reload, resulting in a denial of service condition.Source: sec.cloudapps.cisco.com
Am I affected, and how do I check?
Cisco IOS releases 12.2 through 15.6 are in scope when the device runs a vulnerable release and is configured to process PROFINET messages. From 12.2(52)SE, PROFINET is enabled by default on the base switch module and expansion-unit Ethernet ports, so check the running release and whether PROFINET processing is configured.Source: sec.cloudapps.cisco.com
What should I do about it?
The checked facts do not name a fixed release or upgrade target, so check the vendor advisory for one before planning changes.Source: sec.cloudapps.cisco.com
Is it being exploited?
Yes. CISA added it to its Known Exploited Vulnerabilities catalog on 2022-03-03, which means it has evidence of attacks. No public exploit code is tracked.Source: cisa.gov, cve.now feed data
What if there's no patch?
The checked facts do not list a workaround. The vulnerability depends on the device processing PROFINET messages, so reviewing that configuration is the factor to examine while waiting for a fix.Source: sec.cloudapps.cisco.com