CVE-2020-3566 · netVigilance record NV21-0146

Cisco IOS XR Software DVMRP Memory Exhaustion

past due

What to do

Apply updates per vendor instructions.

CISA deadline 2022-05-03 · passed 4 years 4 months ago · applies to US federal civilian agencies; used elsewhere as a reference SLA

What happened

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.

Who is affected

Cisco IOS XR. Affected version ranges are listed in the vendor advisory and the NVD entry linked under Sources.

Weakness class: CWE-400.

Timeline

2021-11-03
Added to CISA KEVExploitation in the wild confirmed by CISA
2022-05-03
CISA remediation deadlinepassed 4 years 4 months ago

Sources

NVD entry for CVE-2020-3566 nvd.nist.gov/vuln/detail/CVE-2020-3566
CISA Known Exploited Vulnerabilities catalog www.cisa.gov/known-exploited-vulnerabilities-catalog
nvd.nist.gov nvd.nist.gov/vuln/detail/CVE-2020-3566