Buffer overflow in Cisco IOS - CVE-2017-12240
Published: October 4, 2017 / Updated: March 8, 2022
Vulnerability identifier: #VU8683
CSH Severity: High
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:A/U:Amber
CVE-ID: CVE-2017-12240
CWE-ID: CWE-120
Exploitation vector: Remote access
Exploit availability:
The vulnerability is being exploited in the wild
Vendor: Cisco Systems, Inc
Affected software:
Cisco IOS
Cisco IOS
Detailed vulnerability description
The vulnerability allows a remote attacker to cause execute arbitrary code on the target system.
The weakness exists due to a buffer overflow condition in the DHCP relay subsystem of Cisco IOS and Cisco IOS XE Software. A remote attacker can send a specially crafted DHCP Version 4 (DHCPv4) packet, execute arbitrary code and gain full control over the affected system.
The weakness exists due to a buffer overflow condition in the DHCP relay subsystem of Cisco IOS and Cisco IOS XE Software. A remote attacker can send a specially crafted DHCP Version 4 (DHCPv4) packet, execute arbitrary code and gain full control over the affected system.
How to mitigate CVE-2017-12240
Install update from vendor's website.