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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2017-12240 Detail

Description

The DHCP relay subsystem of Cisco IOS 12.2 through 15.6 and Cisco IOS XE Software contains a vulnerability that could allow an unauthenticated, remote attacker to execute arbitrary code and gain full control of an affected system. The attacker could also cause an affected system to reload, resulting in a denial of service (DoS) condition. The vulnerability is due to a buffer overflow condition in the DHCP relay subsystem of the affected software. An attacker could exploit this vulnerability by sending a crafted DHCP Version 4 (DHCPv4) packet to an affected system. A successful exploit could allow the attacker to execute arbitrary code and gain full control of the affected system or cause the affected system to reload, resulting in a DoS condition. Cisco Bug IDs: CSCsm45390, CSCuw77959.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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URL Source(s) Tag(s)
http://www.securityfocus.com/bid/101034 CVE, Cisco Systems, Inc. Broken Link  Third Party Advisory  VDB Entry 
http://www.securitytracker.com/id/1039445 CVE, Cisco Systems, Inc. Broken Link  Third Party Advisory  VDB Entry 
https://quickview.cloudapps.cisco.com/quickview/bug/CSCsm45390 CVE, Cisco Systems, Inc. Vendor Advisory 
https://quickview.cloudapps.cisco.com/quickview/bug/CSCuw77959 CVE, Cisco Systems, Inc. Vendor Advisory 
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170927-dhcp CVE, Cisco Systems, Inc. Vendor Advisory 

This CVE is in CISA's Known Exploited Vulnerabilities Catalog

Reference CISA's BOD 22-01 and Known Exploited Vulnerabilities Catalog for further guidance and requirements.

Vulnerability Name Date Added Due Date Required Action
Cisco IOS and IOS XE Software DHCP Remote Code Execution Vulnerability 03/03/2022 03/24/2022 Apply updates per vendor instructions.

Weakness Enumeration

CWE-ID CWE Name Source
CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer cwe source acceptance level NIST  
CWE-20 Improper Input Validation Cisco Systems, Inc.  

Known Affected Software Configurations Switch to CPE 2.2

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Change History

7 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2017-12240
NVD Published Date:
09/28/2017
NVD Last Modified:
04/19/2025
Source:
Cisco Systems, Inc.