7.5
High
CVE-2018-0156 Cisco IOS Software and Cisco IOS XE Software Smart Install Denial-of-Service Vulnerability
Active exploitation observed
· CISA KEV catalogue
Required action
Apply updates per vendor instructions.
Ransomware campaigns
Not observed so far
Weakness
CWE-399
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. The vulnerability is due to improper validation of packet data. An attacker could exploit this vulnerability by sending a crafted packet to an affected device on TCP port 4786. Only Smart Install client switches are affected. Cisco devices that are configured as a Smart Install director are not affected by this vulnerability. Cisco Bug IDs: CSCvd40673.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Cisco IOS and IOS XE | Versions not published |
Other CVEs of Cisco IOS and IOS XE
The 25 CVEs of Cisco IOS and IOS XE →
CVE-2018-0172
Cisco IOS and IOS XE Software Improper Input Validation Vulnerability
8.6
High
CVE-2018-0174
Cisco IOS Software and Cisco IOS XE Software Improper Input Validation Vulnerability
8.6
High
CVE-2018-0173
Cisco IOS and IOS XE Software Improper Input Validation Vulnerability
8.6
High
CVE-2018-0171
Cisco IOS and IOS XE Software Smart Install Remote Code Execution Vulnerability
7.5
High