CVE-2020-3566

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Summary

CVECVE-2020-3566
StatePUBLIC
Assigner[email protected]
Source PriorityCVE Program / NVD first with legacy fallback
Published2020-08-29 16:15:00 UTC
Updated2023-11-07 03:22:00 UTC
DescriptionA vulnerability in the Distance Vector Multicast Routing Protocol (DVMRP) feature of Cisco IOS XR Software could allow an unauthenticated, remote attacker to exhaust process memory of an affected device. The vulnerability is due to insufficient queue management for Internet Group Management Protocol (IGMP) packets. An attacker could exploit this vulnerability by sending crafted IGMP traffic to an affected device. A successful exploit could allow the attacker to cause memory exhaustion, resulting in instability of other processes. These processes may include, but are not limited to, interior and exterior routing protocols. Cisco will release software updates that address this vulnerability.

Risk And Classification

EPSS: 0.036310000 probability, percentile 0.882930000 (date 2026-07-21)

CISA KEV: Listed on 2021-11-03; due 2022-05-03; ransomware use Unknown

Problem Types: CWE-770

CISA Known Exploited Vulnerability

VendorCisco
ProductIOS XR
NameCisco IOS XR Software DVMRP Memory Exhaustion Vulnerability
Required ActionApply updates per vendor instructions.
Noteshttps://nvd.nist.gov/vuln/detail/CVE-2020-3566

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Hardware Cisco Asr 9001 - All All All
Hardware Cisco Asr 9001 - All All All
Hardware Cisco Asr 9006 - All All All
Hardware Cisco Asr 9006 - All All All
Hardware Cisco Asr 9010 - All All All
Hardware Cisco Asr 9010 - All All All
Hardware Cisco Asr 9901 - All All All
Hardware Cisco Asr 9901 - All All All
Hardware Cisco Asr 9904 - All All All
Hardware Cisco Asr 9904 - All All All
Hardware Cisco Asr 9906 - All All All
Hardware Cisco Asr 9906 - All All All
Hardware Cisco Asr 9910 - All All All
Hardware Cisco Asr 9910 - All All All
Hardware Cisco Asr 9912 - All All All
Hardware Cisco Asr 9912 - All All All
Hardware Cisco Asr 9922 - All All All
Hardware Cisco Asr 9922 - All All All
Operating System Cisco Ios Xr 6.4.2 All All All
Operating System Cisco Ios Xr 6.4.2 All All All

References

ReferenceSourceLinkTags
Cisco IOS XR Software DVMRP Memory Exhaustion Vulnerabilities CISCO tools.cisco.com Vendor Advisory
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis
CISA Known Exploited Vulnerabilities catalog CISA www.cisa.gov kev

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