Risk Letters

Exploited vulnerability

CVE-2020-3569

TLP:CLEAR

Cisco IOS XR Software DVMRP Memory Exhaustion Vulnerability

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.

Facts

  • Vendor: Cisco
  • Product: IOS XR
  • CVSS: 8.6
  • EPSS (probability of exploitation within 30 days): 3.3 %
  • On CISA's Known Exploited Vulnerabilities list since: 3 November 2021
  • First known exploitation: 3 November 2021
  • CISA's deadline for US federal agencies: 3 May 2022
  • Weakness: CWE-400
  • First seen by Risk Letters: 3 November 2021

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Data: NVD (public domain), CISA KEV, FIRST EPSS, MITRE ATT&CK, AlienVault OTX. NVD