Cisco · IOS XR
CVE-2020-3569
Cisco IOS XR Software DVMRP Memory Exhaustion Vulnerabilities
O que é
Multiple vulnerabilities in the Distance Vector Multicast Routing Protocol (DVMRP) feature of Cisco IOS XR Software could allow an unauthenticated, remote attacker to either immediately crash the Internet Group Management Protocol (IGMP) process or make it consume available memory and eventually crash. The memory consumption may negatively impact other processes that are running on the device. These vulnerabilities are due to the incorrect handling of IGMP packets. An attacker could exploit these vulnerabilities by sending crafted IGMP traffic to an affected device. A successful exploit could allow the attacker to immediately crash the IGMP process or cause memory exhaustion, resulting in other processes becoming unstable. These processes may include, but are not limited to, interior and exterior routing protocols. Cisco will release software updates that address these vulnerabilities.
CISA: Cisco IOS XR Distance Vector Multicast Routing Protocol (DVMRP) incorrectly handles Internet Group Management Protocol (IGMP) packets. Exploitation could allow an unauthenticated, remote attacker to immediately crash the IGMP process or make it consume available memory and eventually crash.
O que fazer
Apply updates per vendor instructions.
Prazo para as agências federais dos EUA: 3 de maio de 2022
Mais falhas exploradas de Cisco
| Adicionado | Vulnerabilidade | Produto | Gravidade | Chance de ataque |
|---|---|---|---|---|
| 23 de mai. de 2022 | Open Port | IOS XR | Média 6,5 | 11% |
| 25 de mar. de 2022 | Border Gateway Protocol (BGP) Denial-of-Service | IOS XR | Média 5,9 | 3,3% |
| 25 de mar. de 2022 | Border Gateway Protocol (BGP) Denial-of-Service | IOS XR | Alto 7,5 | 5,7% |
| 3 de nov. de 2021 | Software Discovery Protocol Format String | IOS XR | Alto 8,8 | 12% |
| 3 de nov. de 2021 | Software DVMRP Memory Exhaustion | IOS XR | Alto 8,6 | 3,7% |
| 14 de out. de 2026 | Relative Path Traversal | Secure Email Gateway | Crítica 9,8 | 2,2% |
| 30 de set. de 2026 | Hex Encoding | Catalyst SD-WAN Manager | Crítica 9,8 | 39% |
| 16 de set. de 2026 | Incorrect Use of Privileged APIs | Identity Services Engine | Crítica 10,0 | 76% |
Fontes: Known Exploited Vulnerabilities (CISA, domínio público), CVE records (cve.org) e EPSS (FIRST). A chance de ataque é a estimativa EPSS de que alguém tente explorar a falha nos próximos 30 dias.