CVE-2024-21610

Summary

CVE-2024-21610 is an Improper Handling of Exceptional Conditions vulnerability affecting Juniper Networks Junos OS on MX Series. This issue allows authenticated, low-privileged attackers to cause a limited Denial of Service (DoS) by exploiting a vulnerability in the Class of Service daemon (cosd). In a scaled subscriber scenario, specific commands handled by cosd on behalf of mgd cause the respective mgd processes to get stuck, leading to a denial of service for SSH or telnet sessions when connection limits are reached. Affected versions include all releases earlier than 20.4R3-S9, 21.2R3-S7, 21.3R3-S5, 21.4R3-S5, 22.1R3-S4, 22.2R3-S3, 22.3R3-S2, 22.4R3, and 23.2R1-S2, 23.2R2. The vulnerability can be detected by executing the command "show system processes extensive | match mgd | match sbwait" to identify stuck mgd processes.

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