CVE-2018-0173

CVSS V2 High 7.8 CVSS V3 High 8.6
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.
Overview
  • CVE ID
  • CVE-2018-0173
  • Assigner
  • ykramarz@cisco.com
  • Vulnerability Status
  • Modified
  • Published Version
  • 2018-03-28T22:29:01
  • Last Modified Date
  • 2019-10-09T23:31:22
Weakness Enumerations
CWE URL
CWE-20 http://cwe.mitre.org/data/definitions/20.html
CPE Configuration (Product)
CPE Vulnerable Operator Version Start Version End
AND
cpe:2.3:o:cisco:ios:denali-16.3.4:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:cisco:ios_xe:denali-16.3.4:*:*:*:*:*:*:* 1 OR
cpe:2.3:h:cisco:4321_integrated_services_router:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:4331_integrated_services_router:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:4351_integrated_services_router:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:4431_integrated_services_router:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:4451-x_integrated_services_router:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:asr_1000_series_route_processor_\(rp2\):-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:asr_1000_series_route_processor_\(rp3\):-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:asr_1001-hx:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:asr_1001-x:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:asr_1002-hx:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:asr_1002-x:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:cloud_services_router_1000v:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:cisco:ios:denali-16.3.4:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:cisco:ios_xe:denali-16.3.4:*:*:*:*:*:*:* 1 OR
cpe:2.3:h:rockwellautomation:allen-bradley_armorstratix_5700:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:rockwellautomation:allen-bradley_stratix_5400:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:rockwellautomation:allen-bradley_stratix_5410:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:rockwellautomation:allen-bradley_stratix_5700:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:rockwellautomation:allen-bradley_stratix_8000:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:rockwellautomation:allen-bradley_stratix_8300:-:*:*:*:*:*:*:* 0 OR
CVSS Version 2
  • Version
  • 2.0
  • Vector String
  • AV:N/AC:L/Au:N/C:N/I:N/A:C
  • Access Vector
  • NETWORK
  • Access Compatibility
  • LOW
  • Authentication
  • NONE
  • Confidentiality Impact
  • NONE
  • Integrity Impact
  • NONE
  • Availability Impact
  • COMPLETE
  • Base Score
  • 7.8
  • Severity
  • HIGH
  • Exploitability Score
  • 10
  • Impact Score
  • 6.9
CVSS Version 3
  • Version
  • 3.0
  • Vector String
  • CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
  • Attack Vector
  • NETWORK
  • Attack Compatibility
  • LOW
  • Privileges Required
  • NONE
  • User Interaction
  • NONE
  • Scope
  • CHANGED
  • Confidentiality Impact
  • NONE
  • Availability Impact
  • HIGH
  • Base Score
  • 8.6
  • Base Severity
  • HIGH
  • Exploitability Score
  • 3.9
  • Impact Score
  • 4
References
Reference URL Reference Tags
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180328-dhcpr2 Vendor Advisory
https://www.tenable.com/security/research/tra-2018-06 Third Party Advisory
http://www.securitytracker.com/id/1040591 Third Party Advisory VDB Entry
http://www.securityfocus.com/bid/103545 Third Party Advisory VDB Entry
https://ics-cert.us-cert.gov/advisories/ICSA-18-107-05 Third Party Advisory US Government Resource
https://ics-cert.us-cert.gov/advisories/ICSA-18-107-04 Third Party Advisory US Government Resource
Sources
Source Name Source URL
NIST https://nvd.nist.gov/vuln/detail/CVE-2018-0173
MITRE https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-0173
History
Created Old Value New Value Data Type Notes
2022-05-10 17:07:49 Added to TrackCVE
2022-12-03 03:58:22 psirt@cisco.com ykramarz@cisco.com CVE Assigner updated
2022-12-03 03:58:22 2018-03-28T22:29Z 2018-03-28T22:29:01 CVE Published Date updated
2022-12-03 03:58:22 2019-10-09T23:31:22 CVE Modified Date updated
2022-12-03 03:58:22 Modified Vulnerability Status updated