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CVE-2018-0173

CVE information

Published

4 years ago

Last Modified

2 years ago

CVSSv2.0 Severity

High

CVSSv3.1 Severity

High

Impact Analysis

Description

A vulnerability in the Cisco IOS Software and Cisco IOS XE Software function that restores encapsulated option 82 information in DHCP Version 4 (DHCPv4) packets could allow an unauthenticated, remote attacker to cause an affected device to reload, resulting in a Relay Reply denial of service (DoS) condition. The vulnerability exists because the affected software performs incomplete input validation of encapsulated option 82 information that it receives in DHCPOFFER messages from DHCPv4 servers. An attacker could exploit this vulnerability by sending a crafted DHCPv4 packet to an affected device, which the device would then forward to a DHCPv4 server. When the affected software processes the option 82 information that is encapsulated in the response from the server, an error could occur. A successful exploit could allow the attacker to cause the affected device to reload, resulting in a DoS condition. Cisco Bug IDs: CSCvg62754..

CVSSv2.0 Score

Severity
High
Base Score
7.8/10
Exploit Score
10/10
Access Vector
Network
Access Complexity
Low
Authentication Required
None
Impact Score
6.9/10
Confidentiality Impact
None
Availability Impact
Complete
Integrity Impact
None

CVSSv3.1 Score

Severity
High
Base Score
8.6/10
Exploit Score
3.9/10
Access Vector
Network
Access Complexity
Low
Privileges Required
None
Impact Score
4/10
Confidentiality Impact
None
Availability Impact
High
Integrity Impact
None
Scope
Changed
User Interaction
None

Products Affected

CPE Affected Vulnerable Excluding Edit
cpe:2.3:o:cisco:ios:denali-16.3.4:*:*:*:*:*:*:*
  Yes
-
cpe:2.3:o:cisco:ios_xe:denali-16.3.4:*:*:*:*:*:*:*
  Yes
-
cpe:2.3:h:cisco:asr_1002-x:-:*:*:*:*:*:*:*
  No
-
cpe:2.3:h:cisco:asr_1001-x:-:*:*:*:*:*:*:*
  No
-
cpe:2.3:h:cisco:asr_1001-hx:-:*:*:*:*:*:*:*
  No
-
cpe:2.3:h:cisco:asr_1002-hx:-:*:*:*:*:*:*:*
  No
-
cpe:2.3:h:cisco:4331_integrated_services_router:-:*:*:*:*:*:
  No
-
cpe:2.3:h:cisco:4321_integrated_services_router:-:*:*:*:*:*:
  No
-
cpe:2.3:h:cisco:4431_integrated_services_router:-:*:*:*:*:*:
  No
-
cpe:2.3:h:cisco:asr_1000_series_route_processor_\(rp2\):-:*:
  No
-
cpe:2.3:h:cisco:4451-x_integrated_services_router:-:*:*:*:*:
  No
-
cpe:2.3:h:cisco:asr_1000_series_route_processor_\(rp3\):-:*:
  No
-
cpe:2.3:h:cisco:4351_integrated_services_router:-:*:*:*:*:*:
  No
-
cpe:2.3:h:cisco:cloud_services_router_1000v:-:*:*:*:*:*:*:*
  No
-
cpe:2.3:o:cisco:ios:denali-16.3.4:*:*:*:*:*:*:*
  Yes
-
cpe:2.3:o:cisco:ios_xe:denali-16.3.4:*:*:*:*:*:*:*
  Yes
-
cpe:2.3:h:rockwellautomation:allen-bradley_stratix_5400:-:*:
  No
-
cpe:2.3:h:rockwellautomation:allen-bradley_stratix_5410:-:*:
  No
-
cpe:2.3:h:rockwellautomation:allen-bradley_stratix_5700:-:*:
  No
-
cpe:2.3:h:rockwellautomation:allen-bradley_stratix_8000:-:*:
  No
-
cpe:2.3:h:rockwellautomation:allen-bradley_armorstratix_5700
  No
-
cpe:2.3:h:rockwellautomation:allen-bradley_stratix_8300:-:*:
  No
-