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

CVE-2020-3566

CVSS 8.6v3.1pub. 2020-08-29upd. 2025-10-28

A 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.

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

  • Cisco Asr 9001

    HW
    Cisco
    wszystkie wersje

  • Cisco Asr 9006

    HW
    Cisco
    wszystkie wersje

  • Cisco Asr 9010

    HW
    Cisco
    wszystkie wersje

  • Cisco Asr 9901

    HW
    Cisco
    wszystkie wersje

  • Cisco Asr 9904

    HW
    Cisco
    wszystkie wersje

  • Cisco Asr 9906

    HW
    Cisco
    wszystkie wersje

  • Cisco Asr 9910

    HW
    Cisco
    wszystkie wersje

  • Cisco Asr 9912

    HW
    Cisco
    wszystkie wersje

  • Cisco Asr 9922

    HW
    Cisco
    wszystkie wersje

  • Cisco IOS XR

    OS
    Cisco
    6.4.2

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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