CVE-2024-21595 — HIGH (7.5)

Vulnerability Description

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.

CVSS Score

7.5

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

NONE

Integrity

NONE

Availability

HIGH

Affected Products

Vendor	Product	Versions
Juniper	Junos	21.4
Juniper	Ex4100	-
Juniper	Ex4400	-
Juniper	Ex4600	-
Juniper	Qfx5100	-
Juniper	Qfx5100-96S	-
Juniper	Qfx5110	-
Juniper	Qfx5120	-
Juniper	Qfx5130	-
Juniper	Qfx5200	-
Juniper	Qfx5200-32C	-
Juniper	Qfx5200-48Y	-
Juniper	Qfx5210	-
Juniper	Qfx5210-64C	-
Juniper	Qfx5220	-
Juniper	Qfx5700	-

Related Weaknesses (CWE)

CWE-1286

References

https://advisory.juniper.net/JSA75734Vendor Advisory
https://www.first.org/cvss/calculator/4.0#CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:NThird Party Advisory
https://advisory.juniper.net/JSA75734Vendor Advisory
https://www.first.org/cvss/calculator/4.0#CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:NThird Party Advisory

FAQ

What is CVE-2024-21595?

CVE-2024-21595 is a vulnerability with a CVSS score of 7.5 (HIGH). 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 D...

How severe is CVE-2024-21595?

CVE-2024-21595 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2024-21595?

Check the references section above for vendor advisories and patch information. Affected products include: Juniper Junos, Juniper Ex4100, Juniper Ex4400, Juniper Ex4600, Juniper Qfx5100.