Juniper Networks Junos OS/Junos OS Evolved Routing Protocol Daemon exceptional condition

Summaryinfo

A vulnerability, which was classified as critical, was found in Juniper Networks Junos OS and Junos OS Evolved. The affected element is an unknown function of the component Routing Protocol Daemon. Such manipulation leads to exceptional condition. This vulnerability is uniquely identified as CVE-2024-39560. The attack can only be initiated within the local network. No exploit exists. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in Juniper Networks Junos OS and Junos OS Evolved (affected version not known) and classified as critical. Affected by this issue is some unknown functionality of the component Routing Protocol Daemon. The manipulation with an unknown input leads to a exceptional condition vulnerability. Using CWE to declare the problem leads to CWE-755. The product does not handle or incorrectly handles an exceptional condition. Impacted is availability. CVE summarizes:

An Improper Handling of Exceptional Conditions vulnerability in the routing protocol daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows a logically adjacent downstream RSVP neighbor to cause kernel memory exhaustion, leading to a kernel crash, resulting in a Denial of Service (DoS). The kernel memory leak and eventual crash will be seen when the downstream RSVP neighbor has a persistent error which will not be corrected. System kernel memory can be monitored through the use of the 'show system kernel memory' command as shown below: user@router> show system kernel memory   Real memory total/reserved: 4130268/ 133344 Kbytes kmem map free: 18014398509110220 Kbytes This issue affects: Junos OS: * All versions before 20.4R3-S9, * All versions of 21.2, * from 21.4 before 21.4R3-S5, * from 22.1 before 22.1R3-S5, * from 22.2 before 22.2R3-S3, * from 22.3 before 22.3R3-S2, * from 22.4 before 22.4R3, * from 23.2 before 23.2R2; Junos OS Evolved: * All versions before 21.4R3-S5-EVO, * from 22.1-EVO before 22.1R3-S5-EVO, * from 22.2-EVO before 22.2R3-S3-EVO, * from 22.3-EVO before 22.3R3-S2-EVO, * from 22.4-EVO before 22.4R3-EVO, * from 23.2-EVO before 23.2R2-EVO.

The advisory is shared for download at supportportal.juniper.net. This vulnerability is handled as CVE-2024-39560 since 06/25/2024. The exploitation is known to be easy. The attack can only be initiated within the local network. No form of authentication is required for exploitation. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 01/23/2026).

Upgrading eliminates this vulnerability.

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Productinfo

Type

• Router Operating System

Vendor

• Juniper Networks

Name

• Junos OS
• Junos OS Evolved

License

• commercial

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