CVE-2024-21593: Junos OS: MX Series with MPC10, MPC11, LC9600, and MX304: A specific MPLS packet will cause a PFE crash
An Improper Check or Handling of Exceptional Conditions vulnerability in the Packet Forwarding Engine (PFE) of Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated, adjacent attacker to cause a Denial of Service (DoS).
If an attacker sends a specific MPLS packet, which upon processing, causes an internal loop, that leads to a PFE crash and restart. Continued receipt of these packets leads to a sustained Denial of Service (DoS) condition. Circuit cross-connect (CCC) needs to be configured on the device for it to be affected by this issue.
This issue only affects MX Series with MPC10, MPC11, LC9600, and MX304.
This issue affects: Juniper Networks Junos OS 21.4 versions from 21.4R3 earlier than 21.4R3-S5; 22.2 versions from 22.2R2 earlier than 22.2R3-S2; 22.3 versions from 22.3R1 earlier than 22.3R2-S2; 22.3 versions from 22.3R3 earlier than 22.3R3-S1 22.4 versions from 22.4R1 earlier than 22.4R2-S2, 22.4R3; 23.2 versions earlier than 23.2R1-S1, 23.2R2.
Affected Software
Remediation
Information
Event History
Frequently Asked Questions
What is the severity of CVE-2024-21593?
CVE-2024-21593 has been classified with a High severity level due to its potential to cause a Denial of Service.
How do I fix CVE-2024-21593?
To mitigate CVE-2024-21593, upgrade Junos OS to a version that contains the relevant security patches.
Who is affected by CVE-2024-21593?
CVE-2024-21593 affects multiple versions of Juniper Networks Junos OS, specifically versions between 21.4R3 and 23.2R2.
What type of attack does CVE-2024-21593 allow?
CVE-2024-21593 allows an unauthenticated, adjacent attacker to perform a Denial of Service attack.
What is the cause of the vulnerability in CVE-2024-21593?
CVE-2024-21593 is caused by improper checking or handling of exceptional conditions in the Packet Forwarding Engine (PFE) of Junos OS.