CVE-2018-0174 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,...
HighCVSS 8.6
EPSS 7.6%
CISA KEV
added 2022-03-03 · due 2022-03-17
Exploited in the wild
- Published
- Updated
- Exploit status
- Exploited in the wild (confirmed)
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.
CISA Known Exploited Vulnerability
- Date added
- 2022-03-03
- Due date (FCEB)
- 2022-03-17
- Ransomware use
- Unknown
Required action
Apply updates per vendor instructions.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| cisco ios | = 12.2(33)sre7a | No fix listed |
| cisco ios | <= 15.2\(4a\)ea5 | No fix listed |
| cisco ios | <= 15.2\(6\)e0a | No fix listed |
| cisco ios xe | = 12.2(33)sre7a | No fix listed |
| cisco ios xe | <= 15.2\(4a\)ea5 | No fix listed |
| cisco ios xe | <= 15.2\(6\)e0a | No fix listed |
References
- 103554 broken-link third-party-advisory vdb-entry
- 1040591 broken-link third-party-advisory vdb-entry
- ics-cert.us-cert.gov third-party-advisory us-government-resource
- ics-cert.us-cert.gov third-party-advisory us-government-resource
- tools.cisco.com vendor-advisory
- www.tenable.com third-party-advisory
- www.cisa.gov government-resource us-government-resource