CVE-2017-12240

Published Sep 29, 2017

Last updated 4 months ago

Overview

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.
Source
ykramarz@cisco.com
NVD status
Analyzed

Risk scores

CVSS 3.1

Type
Primary
Base score
9.8
Impact score
5.9
Exploitability score
3.9
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Severity
CRITICAL

CVSS 2.0

Type
Primary
Base score
10
Impact score
10
Exploitability score
10
Vector string
AV:N/AC:L/Au:N/C:C/I:C/A:C

Known exploits

Data from CISA

Vulnerability name
Cisco IOS and IOS XE Software DHCP Remote Code Execution Vulnerability
Exploit added on
Mar 3, 2022
Exploit action due
Mar 24, 2022
Required action
Apply updates per vendor instructions.

Weaknesses

nvd@nist.gov
CWE-119
ykramarz@cisco.com
CWE-20

Social media

Hype score
Not currently trending

Configurations