An Improper Check for Unusual or Exceptional Conditions vulnerability in the kernel of Juniper Network Junos OS on MX Series allows a network based attacker with low privileges to cause a denial of service.
If a scaled configuration for Source class usage (SCU) / destination class usage (DCU) (more than 10 route classes) is present and the SCU/DCU statistics are gathered by executing specific SNMP requests or CLI commands, a 'vmcore' for the RE kernel will be seen which leads to a device restart. Continued exploitation of this issue will lead to a sustained DoS.
This issue only affects MX Series devices with MPC10, MPC11 or LC9600, and MX304. No other MX Series devices are affected.
This issue affects Juniper Networks Junos OS:
* All versions earlier than 20.4R3-S9;
* 21.2 versions earlier than 21.2R3-S6;
* 21.3 versions earlier than 21.3R3-S5;
* 21.4 versions earlier than 21.4R3;
* 22.1 versions earlier than 22.1R3;
* 22.2 versions earlier than 22.2R2;
* 22.3 versions earlier than 22.3R2.
Metrics
Affected Vendors & Products
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EUVD-2024-19251 | An Improper Check for Unusual or Exceptional Conditions vulnerability in the kernel of Juniper Network Junos OS on MX Series allows a network based attacker with low privileges to cause a denial of service. If a scaled configuration for Source class usage (SCU) / destination class usage (DCU) (more than 10 route classes) is present and the SCU/DCU statistics are gathered by executing specific SNMP requests or CLI commands, a 'vmcore' for the RE kernel will be seen which leads to a device restart. Continued exploitation of this issue will lead to a sustained DoS. This issue only affects MX Series devices with MPC10, MPC11 or LC9600, and MX304. No other MX Series devices are affected. This issue affects Juniper Networks Junos OS: * All versions earlier than 20.4R3-S9; * 21.2 versions earlier than 21.2R3-S6; * 21.3 versions earlier than 21.3R3-S5; * 21.4 versions earlier than 21.4R3; * 22.1 versions earlier than 22.1R3; * 22.2 versions earlier than 22.2R2; * 22.3 versions earlier than 22.3R2. |
Solution
The following software releases have been updated to resolve this specific issue: Junos OS 20.4R3-S9, 21.2R3-S6, 21.3R3-S5, 21.4R3, 22.1R3, 22.2R2, 22.3R2, 22.4R1, and all subsequent releases.
Workaround
There are no known workarounds for this issue.
Tue, 17 Jun 2025 21:15:00 +0000
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Status: PUBLISHED
Assigner: juniper
Published:
Updated: 2025-06-17T21:09:19.638Z
Reserved: 2023-12-27T19:38:25.707Z
Link: CVE-2024-21603

Updated: 2025-06-17T21:07:43.335Z

Status : Modified
Published: 2024-01-12T01:15:48.467
Modified: 2024-11-21T08:54:42.040
Link: CVE-2024-21603

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