HIGH🚩 CISA KEV⚡ EXPLOIT✓ PATCH🇵🇱 Wersja polska

CVE-2020-3569

CVSS 8.6v3.1pub. 2020-09-23upd. 2025-10-28

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.

CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

  • Cisco Asr 9000v

    HW
    Cisco
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  • Cisco Asr 9001

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  • Cisco Asr 9006

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  • Cisco Asr 9010

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  • Cisco Asr 9901

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  • Cisco Asr 9903

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  • Cisco Asr 9904

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  • Cisco Asr 9906

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  • Cisco Asr 9910

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  • Cisco Asr 9912

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  • Cisco Asr 9922

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  • Cisco Crs

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  • Cisco Crs 1 16 Slot Line Card Chassis

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  • Cisco Crs 1 16 Slot Single Shelf System

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  • Cisco Crs 1 4 Slot Single Shelf System

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  • Cisco Crs 1 8 Slot Line Card Chassis

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    Cisco
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  • Cisco Crs 1 8 Slot Single Shelf System

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    Cisco
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  • Cisco Crs 1 Fabric Card Chassis

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    Cisco
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  • Cisco Crs 1 Line Card Chassis \(dual\)

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    Cisco
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  • Cisco Crs 1 Line Card Chassis \(multi\)

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  • Cisco Crs 1 Multishelf System

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  • Cisco Crs 3 16 Slot Single Shelf System

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  • Cisco Crs 3 4 Slot Single Shelf System

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  • Cisco Crs 3 8 Slot Single Shelf System

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  • Cisco Crs 3 Multishelf System

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  • Cisco Crs 8\/s B Crs

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  • Cisco Crs 8\/scrs

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  • Cisco Crs Performance Route Processor

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  • Cisco Crs X

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  • Cisco Crs X 16 Slot Single Shelf System

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CISA KEV — detailsi

Vendori
Cisco ↗
Producti
IOS XR
Added to KEVi
November 3, 2021
Remediation deadline (US Federal)i
May 3, 2022(overdue)
Required action (CISA)i

Apply updates per vendor instructions.

CISA descriptioni

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.

🔴
IMMEDIATE ACTION
Actively exploited in the wild (CISA KEV). Patch immediately.
⏰CISA DEADLINE: 3 maja 2022
CWE
References

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