High severity · published Mar 28, 2018
CVE-2018-0172
Cisco IOS and IOS XE Software Improper Input Validation Vulnerability
In wildKEV
8.6
CVSS
7.8%
EPSS
Yes
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)7.8% · higher than 95% of CVEs
Exploited in the wildYes
CISA KEVListed Mar 3, 2022
Federal remediation dueMar 17, 2022
Ransomware campaign useNot known
Affected products
Which versions
IX
IOS XE · Cisco
All versions, or not specified · source: NVD
CI
Cisco IOS and IOS XE ·
Cisco IOS and IOS XE · source: vendor
IO
Ios · Cisco
All versions, or not specified · source: NVD
IA
IOS and IOS XE Software · Cisco
All versions, or not specified · source: KEV
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2018-0172
CVE.org
https://www.cve.org/CVERecord?id=CVE-2018-0172
CISA KEV catalogue
https://www.cisa.gov/known-exploited-vulnerabilities-catalog
x_refsource_MISC
https://ics-cert.us-cert.gov/advisories/ICSA-18-107-04
x_refsource_MISC
https://www.tenable.com/security/research/tra-2018-06
vdb-entry
http://www.securitytracker.com/id/1040591
vdb-entry
http://www.securityfocus.com/bid/103552
x_refsource_CONFIRM
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180328-dhcpr1
x_refsource_MISC
https://ics-cert.us-cert.gov/advisories/ICSA-18-107-05
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