CVEvulnerability

CVE-2017-12234

7.5 HIGH Known exploited Published 2017-09-29 Modified 2026-06-17 Official page ↗

CISA Known Exploited Vulnerability

Cisco IOS Software Common Industrial Protocol Request Denial-of-Service Vulnerability — Cisco IOS software

There is a vulnerability in the implementation of the Common Industrial Protocol (CIP) feature in Cisco IOS could allow an unauthenticated, remote attacker to cause an affected device to reload, resulting in a denial of service.

Added to KEV: 2022-03-03
Remediation due: 2022-03-24
Ransomware use: Unknown
Required action: Apply updates per vendor instructions.
Notes: https://nvd.nist.gov/vuln/detail/CVE-2017-12234

Status: Analyzed
Published: 2017-09-29
Last modified: 2026-06-17
Assigner: [email protected]
CVSS 3.1 ([email protected]): 7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 3.1 (134c704f-9b21-4f2e-91b3-4a467353bcc0): 7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 2.0 ([email protected]): 7.8 HIGH — AV:N/AC:L/Au:N/C:N/I:N/A:C
Weaknesses: CWE-20

Description

Multiple vulnerabilities in the implementation of the Common Industrial Protocol (CIP) feature in Cisco IOS 12.4 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 vulnerabilities are due to the improper parsing of crafted CIP packets destined to an affected device. An attacker could exploit these vulnerabilities by sending crafted CIP packets to be processed by an affected device. A successful exploit could allow the attacker to cause the affected device to reload, resulting in a DoS condition. Cisco Bug IDs: CSCvc43709.

Affected configurations

• cisco ios (>= 12.4 <= 15.6)

Weakness · CWE (1)

CWE-20 Improper Input Validation weakness

References