CVE-2023-44181

Junos OS: QFX5k: l2 loop in the overlay impacts the stability in a EVPN/VXLAN environment

Description

An Improperly Implemented Security Check for Standard vulnerability in storm control of Juniper Networks Junos OS QFX5k devices allows packets to be punted to ARP queue causing a l2 loop resulting in a DDOS violations and DDOS syslog. This issue is triggered when Storm control is enabled and ICMPv6 packets are present on device. This issue affects Juniper Networks: Junos OS * All versions prior to 20.2R3-S6 on QFX5k; * 20.3 versions prior to 20.3R3-S5 on QFX5k; * 20.4 versions prior to 20.4R3-S5 on QFX5k; * 21.1 versions prior to 21.1R3-S4 on QFX5k; * 21.2 versions prior to 21.2R3-S3 on QFX5k; * 21.3 versions prior to 21.3R3-S2 on QFX5k; * 21.4 versions prior to 21.4R3 on QFX5k; * 22.1 versions prior to 22.1R3 on QFX5k; * 22.2 versions prior to 22.2R2 on QFX5k.

Remediation

Solution:

  • The following software releases have been updated to resolve this specific issue: Junos OS 20.2R3-S6, 20.3R3-S5, 20.4R3-S5, 21.1R3-S4, 21.2R3-S3, 21.3R3-S2, 21.4R3, 22.1R3, 22.2R2, 22.3R1, and all subsequent releases.

Workaround:

  • Disable storm control configuration.

Category

7.5
CVSS
Severity: High
CVSS 3.1 •
EPSS 0.09%
Vendor Advisory juniper.net
Affected: Juniper Networks Junos OS
Published at:
Updated at:

References

Link Tags
https://supportportal.juniper.net/JSA73145 vendor advisory
https://www.juniper.net/documentation/us/en/software/junos/security-services/topics/task/rate-limiting-storm-control-disabling-cli-els.html product technical description

Frequently Asked Questions

What is the severity of CVE-2023-44181?
CVE-2023-44181 has been scored as a high severity vulnerability.
How to fix CVE-2023-44181?
To fix CVE-2023-44181: The following software releases have been updated to resolve this specific issue: Junos OS 20.2R3-S6, 20.3R3-S5, 20.4R3-S5, 21.1R3-S4, 21.2R3-S3, 21.3R3-S2, 21.4R3, 22.1R3, 22.2R2, 22.3R1, and all subsequent releases.
Is CVE-2023-44181 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2023-44181 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2023-44181?
CVE-2023-44181 affects Juniper Networks Junos OS.
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