CVE-2018-0172

HIGH

Description

A vulnerability in the DHCP option 82 encapsulation functionality of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause an affected device to reload, resulting in a denial of service (DoS) condition. The vulnerability exists because the affected software performs incomplete input validation of option 82 information that it receives in DHCP Version 4 (DHCPv4) packets from DHCP relay agents. An attacker could exploit this vulnerability by sending a crafted DHCPv4 packet to an affected device. A successful exploit could allow the attacker to cause a heap overflow condition on the affected device, which will cause the device to reload and result in a DoS condition. Cisco Bug IDs: CSCvg62730.

References

http://www.securityfocus.com/bid/103552

http://www.securitytracker.com/id/1040591

https://ics-cert.us-cert.gov/advisories/ICSA-18-107-04

https://ics-cert.us-cert.gov/advisories/ICSA-18-107-05

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180328-dhcpr1

https://www.tenable.com/security/research/tra-2018-06

Details

Source: MITRE

Published: 2018-03-28

Updated: 2018-04-23

Type: CWE-20

Risk Information

CVSS v2.0

Base Score: 7.8

Vector: (AV:N/AC:L/Au:N/C:N/I:N/A:C)

Impact Score: 6.9

Exploitability Score: 10

Severity: HIGH

CVSS v3.0

Base Score: 8.6

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

Impact Score: 4

Exploitability Score: 3.9

Severity: HIGH