What is CVE-2024-21595?

CVE-2024-21595 is a high-severity vulnerability in Juniper Ex4100, classified under CWE-1286. CVSS score: 7.5/10. Published 2024-01-12.

How severe is CVE-2024-21595?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Juniper Ex4100

CVE-2024-21595

An Improper Validation of Syntactic Correctness of Input 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). If an attacker sends high rate of specific ICMP traffic to a device with VXLAN configured, this causes a deadlock of the PFE and results in the device becoming unresponsive. A manual restart will be required to recover the device. This issue only affects EX4100, EX4400, EX4600, QFX5000 Series devices. This issue affects: Juniper Networks Junos OS * 21.4R3 versions earlier than 21.4R3-S4; * 22.1R3 versions earlier than 22.1R3-S3; * 22.2R2 versions earlier than 22.2R3-S1; * 22.3 versions earlier than 22.3R2-S2, 22.3R3; * 22.4 versions earlier than 22.4R2; * 23.1 versions earlier than 23.1R2.

EPSS: 0.005 (44.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Juniper Ex4100
Juniper Ex4400
Juniper Ex4600
Juniper Junos — versions 21.4, 22.1, 22.2
Juniper Qfx5100
Juniper Qfx5100-96s
Juniper Qfx5110
Juniper Qfx5120
Juniper Qfx5130
Juniper Qfx5200

Weakness classification (CWE)

CWE-1286

References

sirt@juniper.net (vendor-advisory, Vendor Advisory)
sirt@juniper.net (technical-description, Third Party Advisory)

Frequently asked questions

What is CVE-2024-21595?: CVE-2024-21595 is a high-severity vulnerability in Juniper Ex4100, classified under CWE-1286. CVSS score: 7.5/10. Published 2024-01-12.
How severe is CVE-2024-21595?: High severity. CVSS v3 base score is 7.5 out of 10.