CVE-2023-22403
Junos OS: QFX10K Series: An ICCP flap will be observed due to excessive specific traffic
An Allocation of Resources Without Limits or Throttling vulnerability in the Packet Forwarding Engine (PFE) of Juniper Networks Junos OS allows a network-based, unauthenticated attacker to cause a Denial of Service (DoS).
On QFX10K Series, Inter-Chassis Control Protocol (ICCP) is used in MC-LAG topologies to exchange control information between the devices in the topology. ICCP connection flaps and sync issues will be observed due to excessive specific traffic to the local device.
This issue affects Juniper Networks Junos OS on QFX10K Series:
- All versions prior to 20.2R3-S7;
- 20.4 versions prior to 20.4R3-S4;
- 21.1 versions prior to 21.1R3-S3;
- 21.2 versions prior to 21.2R3-S1;
- 21.3 versions prior to 21.3R3;
- 21.4 versions prior to 21.4R3;
- 22.1 versions prior to 22.1R2.
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: QFX10K Series: An ICCP flap will be observed due to excessive specific traffic
An Allocation of Resources Without Limits or Throttling vulnerability in the Packet Forwarding Engine (PFE) of Juniper Networks Junos OS allows a network-based, unauthenticated attacker to cause a Denial of Service (DoS).
On QFX10K Series, Inter-Chassis Control Protocol (ICCP) is used in MC-LAG topologies to exchange control information between the devices in the topology. ICCP connection flaps and sync issues will be observed due to excessive specific traffic to the local device.
This issue affects Juniper Networks Junos OS on QFX10K Series:
- All versions prior to 20.2R3-S7;
- 20.4 versions prior to 20.4R3-S4;
- 21.1 versions prior to 21.1R3-S3;
- 21.2 versions prior to 21.2R3-S1;
- 21.3 versions prior to 21.3R3;
- 21.4 versions prior to 21.4R3;
- 22.1 versions prior to 22.1R2.
- Record
CVE-2023-22403- 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-770
- Updated
- 2026-11-02
EUVDEUVD-2023-26566
An Allocation of Resources Without Limits or Throttling vulnerability in the Packet Forwarding Engine (PFE) of Juniper Networks Junos OS allows a network-based, unauthenticated attacker to cause a Denial of Service (DoS).
On QFX10K Series, Inter-Chassis Control Protocol (ICCP) is used in MC-LAG topologies to exchange control information between the devices in the topology. ICCP connection flaps and sync issues will be observed due to excessive specific traffic to the local device.
This issue affects Juniper Networks Junos OS on QFX10K Series:
- All versions prior to 20.2R3-S7;
- 20.4 versions prior to 20.4R3-S4;
- 21.1 versions prior to 21.1R3-S3;
- 21.2 versions prior to 21.2R3-S1;
- 21.3 versions prior to 21.3R3;
- 21.4 versions prior to 21.4R3;
- 22.1 versions prior to 22.1R2.
- Record
EUVD-2023-26566- 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
GitHub AdvisoriesGHSA-2gch-6fpv-fjxp
An Allocation of Resources Without Limits or Throttling vulnerability in the Packet Forwarding...
An Allocation of Resources Without Limits or Throttling vulnerability in the Packet Forwarding Engine (PFE) of Juniper Networks Junos OS allows a network-based, unauthenticated attacker to cause a Denial of Service (DoS). On QFX10k Series Inter-Chassis Control Protocol (ICCP) is used in MC-LAG topologies to exchange control information between the devices in the topology. ICCP connection flaps and sync issues will be observed due to excessive specific traffic to the local device. This issue affects Juniper Networks Junos OS: All versions prior to 20.2R3-S7; 20.4 versions prior to 20.4R3-S4; 21.1 versions prior to 21.1R3-S3; 21.2 versions prior to 21.2R3-S1; 21.3 versions prior to 21.3R3; 21.4 versions prior to 21.4R3; 22.1 versions prior to 22.1R2.
- Record
GHSA-2gch-6fpv-fjxp- 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-770
- Updated
- 2026-11-02
NVD
An Allocation of Resources Without Limits or Throttling vulnerability in the Packet Forwarding Engine (PFE) of Juniper Networks Junos OS allows a network-based, unauthenticated attacker to cause a Denial of Service (DoS).
On QFX10K Series, Inter-Chassis Control Protocol (ICCP) is used in MC-LAG topologies to exchange control information between the devices in the topology. ICCP connection flaps and sync issues will be observed due to excessive specific traffic to the local device.
This issue affects Juniper Networks Junos OS on QFX10K Series:
- All versions prior to 20.2R3-S7;
- 20.4 versions prior to 20.4R3-S4;
- 21.1 versions prior to 21.1R3-S3;
- 21.2 versions prior to 21.2R3-S1;
- 21.3 versions prior to 21.3R3;
- 21.4 versions prior to 21.4R3;
- 22.1 versions prior to 22.1R2.
- Record
CVE-2023-22403- 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-770
- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2023-22403 is a high vulnerability (CVSS 7.5) in Juniper Junos, published January 12, 2023. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.66%, the 51st percentile. No source names a fixed version.