Critical severity · published Mar 28, 2018
CVE-2018-0171
Cisco IOS and IOS XE Software Smart Install Remote Code Execution Vulnerability
In wildKEV
9.8
CVSS
99.5%
EPSS
Yes
On KEV
Description
A vulnerability in the Smart Install feature of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, remote attacker to trigger a reload of an affected device, resulting in a denial of service (DoS) condition, or to execute arbitrary code on an affected device. The vulnerability is due to improper validation of packet data. An attacker could exploit this vulnerability by sending a crafted Smart Install message to an affected device on TCP port 4786. A successful exploit could allow the attacker to cause a buffer overflow on the affected device, which could have the following impacts: Triggering a reload of the device, Allowing the attacker to execute arbitrary code on the device, Causing an indefinite loop on the affected device that triggers a watchdog crash. Cisco Bug IDs: CSCvg76186.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)99.5% · higher than 100% of CVEs
Exploited in the wildYes
CISA KEVListed Nov 3, 2021
Federal remediation dueMay 3, 2022
Ransomware campaign useNot known
Affected products
Which versions
CI
Cisco IOS and IOS XE ·
Cisco IOS and IOS XE · source: vendor
IO
Ios · Cisco
15.2(5)e · source: NVD
IA
IOS and IOS XE · Cisco
All versions, or not specified · source: KEV
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2018-0171
CVE.org
https://www.cve.org/CVERecord?id=CVE-2018-0171
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
vdb-entry
http://www.securitytracker.com/id/1040580
x_refsource_CONFIRM
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180328-smi2
x_refsource_MISC
https://www.darkreading.com/perimeter/attackers-exploit-cisco-switch-issue-as-vendor-warns-of-yet-another-critical-flaw/d/d-id/1331490
x_refsource_MISC
https://ics-cert.us-cert.gov/advisories/ICSA-18-107-05
vdb-entry
http://www.securityfocus.com/bid/103538
More from Cisco IOS and IOS XE
9.8
CVE-2018-0151
Cisco IOS Software and Cisco IOS XE Software Quality of Service Remote Code Execution Vulnerability
9.8
CVE-2017-12240
Cisco IOS and IOS XE Software DHCP Remote Code Execution Vulnerability
8.6
CVE-2018-0158
Cisco IOS and XE Software Internet Key Exchange Memory Leak Vulnerability
8.6
CVE-2018-0174
Cisco IOS Software and Cisco IOS XE Software Improper Input Validation Vulnerability
8.6
CVE-2018-0155
Cisco Catalyst Bidirectional Forwarding Detection Denial-of-Service Vulnerability