8.6
High
Exploited
CVE-2018-0174 Cisco IOS Software and Cisco IOS XE Software Improper Input Validation Vulnerability
Active exploitation observed
· CISA KEV catalogue
Required action
Apply updates per vendor instructions.
Ransomware campaigns
Not observed so far
Weakness
CWE-20
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 the affected device to reload, resulting in a DoS condition. Cisco Bug IDs: CSCuh91645.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Cisco IOS and IOS XE | Versions not published |
References
- 103554 www.securityfocus.com
- ics-cert.us-cert.gov ics-cert.us-cert.gov
- www.tenable.com www.tenable.com
- 1040591 www.securitytracker.com
- tools.cisco.com tools.cisco.com
- ics-cert.us-cert.gov ics-cert.us-cert.gov
Timeline
- Published
- Added to the KEV catalogue
- Last modified
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The 25 CVEs of Cisco IOS and IOS XE →
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