CVE-2023-44181
Junos OS: QFX5k: l2 loop in the overlay impacts the stability in a EVPN/VXLAN environment
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
Junos OS: QFX5k: l2 loop in the overlay impacts the stability in a EVPN/VXLAN environment
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.
- Record
CVE-2023-44181- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
EUVDEUVD-2023-48540
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.
- Record
EUVD-2023-48540- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-03
GitHub AdvisoriesGHSA-9jrm-qw53-pvvc
An Improperly Implemented Security Check for Standard vulnerability in storm control of Juniper...
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.
- Record
GHSA-9jrm-qw53-pvvc- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-835
- Updated
- 2026-11-02
NVD
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.
- Record
CVE-2023-44181- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-835
- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases, published | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2023-44181 is a high vulnerability (CVSS 7.5) in Juniper Junos, published October 12, 2023. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.64%, the 50th percentile. No source names a fixed version.