CVEvulnerability

CVE-2017-12232

6.5 MEDIUM Known exploited Published 2017-09-29 Modified 2026-06-17 Official page ↗

CISA Known Exploited Vulnerability

Cisco IOS Software for Cisco Integrated Services Routers Denial-of-Service Vulnerability — Cisco IOS software

A vulnerability in the implementation of a protocol in Cisco Integrated Services Routers Generation 2 (ISR G2) Routers running Cisco IOS could allow an unauthenticated, adjacent 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-2017-12232

Status: Analyzed
Published: 2017-09-29
Last modified: 2026-06-17
Assigner: [email protected]
CVSS 3.1 ([email protected]): 6.5 MEDIUM — CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 3.1 (134c704f-9b21-4f2e-91b3-4a467353bcc0): 6.5 MEDIUM — CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 2.0 ([email protected]): 6.1 MEDIUM — AV:A/AC:L/Au:N/C:N/I:N/A:C
Weaknesses: CWE-399

Description

A vulnerability in the implementation of a protocol in Cisco Integrated Services Routers Generation 2 (ISR G2) Routers running Cisco IOS 15.0 through 15.6 could allow an unauthenticated, adjacent attacker to cause an affected device to reload, resulting in a denial of service (DoS) condition. The vulnerability is due to a misclassification of Ethernet frames. An attacker could exploit this vulnerability by sending a crafted Ethernet frame to 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: CSCvc03809.

Affected configurations

• cisco ios (>= 15.0 <= 15.6)

Weakness · not in database (1)

CWE-399

References