SECUFOCUSNOW
Home›CVE index›CVE-2020-3569
CISA KEV · Known exploitedHigh

CVE-2020-3569

Cisco IOS XR

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 cou...

CVSS
8.6
EPSS
3.29%
87.3% percentile
CISA KEV
Listed
Published
2020.09.23
PRIORITY ASSESSMENT

Immediate review

CISA has listed this vulnerability in the Known Exploited Vulnerabilities catalog.

Known exploitationConfirmed by CISA KEV
Exploit probability3.29%
Technical severityCVSS 8.6

Vulnerability overview

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 cou...

Affected product and versions

Product
Cisco IOS XR
Affected versions
6.1.4, 6.2.3, 6.3.3, 6.4.2, 6.5.3, 6.6.2, 6.6.3, 7.0.2, 7.1.2, 7.1.15, < 6.5.2, 6.4.3
Fixed versions
6.5.2

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
CISA required action

Apply updates per vendor instructions.

Due date: 2022.05.03
  1. 1
    Identify

    Confirm that Cisco IOS XR and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
CWE
CWE-400, CWE-770
KEV added
2021.11.03
Ransomware use
미확인
CVE-2020-3569 — Cisco IOS XR | SECUFOCUS NOW