CVE-2018-0172
악용 확인 Cisco IOS and IOS XE Software Improper Input Validation Vulnerability
악용 여부
악용 확인
심각도 (발행처 발표값)
높음8.6
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
악용 확률 (EPSS)
7.8%
한국어 공식 권고
CISA 원문
A vulnerability in the DHCP option 82 encapsulation functionality of Cisco IOS Software and Cisco IOS XE Software could allow for denial-of-service (DoS).— CISA KEV · shortDescription 원문
Apply updates per vendor instructions.— CISA KEV · requiredAction 원문
취약점 설명 (NVD 원문)
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.
CWE-20 CWE-787
악용 확률 변화
| 기준일 | 확률 | 백분위 |
|---|---|---|
| 2026-09-06 | 7.82% | 94.3% |
| 2026-09-05 | 7.87% | 94.4% |
| 2026-09-04 | 7.87% | 94.3% |