Cisco · IOS XE Software
CVE-2018-0174
Cisco IOS Software and Cisco IOS XE Software Improper Input Validation Vulnerability
Qué es
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: 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).
Qué hacer
Apply updates per vendor instructions.
Plazo para las agencias federales de EE. UU.: 17 de marzo de 2022
- Añadida a la lista de CISA
- 3 de marzo de 2022
- Publicada
- 28 de marzo de 2018
- Gravedad
- Alto 8,6 CVSS 3.1
- Probabilidad de ataques en los próximos 30 días (EPSS)
- 7,6% entre el 5,5% superior de todas las vulnerabilidades conocidas
- Debilidad
- CWE-20
- Más detalles
- NVD · CVE.org · CISA
Todas las referencias (6)
- http://www.securityfocus.com/bid/103554
- https://ics-cert.us-cert.gov/advisories/ICSA-18-107-04
- https://www.tenable.com/security/research/tra-2018-06
- http://www.securitytracker.com/id/1040591
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180328-dhcpr3
- https://ics-cert.us-cert.gov/advisories/ICSA-18-107-05
Más fallos explotados de Cisco
| Añadido | Vulnerabilidad | Producto | Gravedad | Prob. de ataque |
|---|---|---|---|---|
| 3 mar 2022 | Ethernet Virtual Private Network Border Gateway Protocol Denial-of-Service | IOS XE Software | Media 5,9 | 5,2% |
| 14 oct 2026 | Relative Path Traversal | Secure Email Gateway | Crítica 9,8 | 2,2% |
| 30 sept 2026 | Hex Encoding | Catalyst SD-WAN Manager | Crítica 9,8 | 39% |
| 16 sept 2026 | Incorrect Use of Privileged APIs | Identity Services Engine | Crítica 10,0 | 76% |
| 14 sept 2026 | SQL Injection | Secure Email Gateway | Crítica 9,8 | 30% |
| 9 sept 2026 | Firewall Management Center Authentication Bypass Using an Alternate Path or Channel | Secure Firewall Management Center (FMC) and Security Cloud Control (SCC) Firewall Management | Crítica 10,0 | 88% |
| 11 ago 2026 | Secure Firewall Adaptive Security Appliance (ASA) and Secure Firewall Threat Defense (FTD) Heap Inspection | Secure Firewall Adaptive Security Appliance (ASA) and Secure Firewall Threat Defense (FTD) | Alto 8,6 | 1,0% |
| 29 jul 2026 | Secure Firewall Management Center Use of Hard-coded Password | Secure Firewall Management Center (FMC) | Media 5,3 | 35% |
Fuentes: Known Exploited Vulnerabilities (CISA, dominio público), CVE records (cve.org) y EPSS (FIRST). La probabilidad de ataque es la estimación EPSS de que alguien intente explotar el fallo en los próximos 30 días.