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.



Source: MITRE

Published: 2018-03-28

Updated: 2020-09-04

Type: CWE-787

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:3.1/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

Tenable Plugins

View all (4 total)

500172Cisco Ios Improper Restriction of Operations within the Bounds of a Memory BufferNessusSCADA
720228Rockwell Automation Stratix Ethernet Switches < 15.3 IOS DHCP ReloadNessus Network MonitorSCADA
109088Cisco IOS DHCP Multiple VulnerabilitiesNessusCISCO
109087Cisco IOS DHCP Multiple VulnerabilitiesNessusCISCO