CVE-2020-3566 — Cisco IOS XR Software DVMRP Memory Exhaustion Vulnerability
CVE-2020-3566: Cisco IOS XR Software DVMRP Memory Exhaustion Vulnerability
CISA Known Exploited Vulnerability (KEV)
| Vendor / project | Cisco |
| Product | IOS XR |
| Date added | 2021-11-03 |
| Due date | 2022-05-03 |
| Ransomware campaign use | Unknown |
Description
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.
Required action (CISA)
Apply updates per vendor instructions.
Notes
https://nvd.nist.gov/vuln/detail/CVE-2020-3566
Weakness behind it
CISA records this vulnerability as an instance of CWE-400. From there the chain continues into CAPEC attack patterns and ATT&CK techniques, all inside this corpus.
References
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-3566
- KEV catalog: https://www.cisa.gov/known-exploited-vulnerabilities-catalog
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