QID 44148

Date Published: 2024-01-22

QID 44148: Juniper Network Operating System (Junos OS) Denial of Service (DoS) Vulnerability (JSA75734)

Juniper Junos is the network operating system used in Juniper Networks hardware systems.

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).

Note: 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 and 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

QID detection logic: (Authenticated)

It checks for vulnerable Junos OS version.

Successful exploitation of this vulnerability allows an unauthenticated attacker to cause a Denial of Service (DoS).

  • CVSS V3 rated as High - 7.5 severity.
  • CVSS V2 rated as Critical - 9 severity.
    • Solution
    Vendor has released patch addressing the vulnerabilities, for more information please refer JSA75734

    Vendor References

    CVEs related to QID 44148

    CVE-2024-21595 |
    Software Advisories
    Advisory ID Software Component Link
    JSA75734 URL Logo supportportal.juniper.net/JSA75734
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