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

Summaryinfo

A vulnerability was found in Juniper Junos OS and Junos OS Evolved and classified as critical. This vulnerability affects unknown code of the component Routing Protocol Daemon. Such manipulation leads to exceptional condition. This vulnerability is referenced as CVE-2024-39525. It is possible to launch the attack remotely. No exploit is available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Juniper Junos OS and Junos OS Evolved (the affected version is unknown). Affected by this issue is an unknown code 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 an unauthenticated network-based attacker sending a specific BGP packet to cause rpd to crash and restart, resulting in a Denial of Service (DoS). Continued receipt and processing of this packet will create a sustained Denial of Service (DoS) condition. This issue only affects systems with BGP traceoptions enabled and requires a BGP session to be already established.  Systems without BGP traceoptions enabled are not affected by this issue. This issue affects iBGP and eBGP, and both IPv4 and IPv6 are affected by this vulnerability. This issue affects: Junos OS:  * All versions before 21.2R3-S8,  * from 21.4 before 21.4R3-S8,  * from 22.2 before 22.2R3-S4,  * from 22.3 before 22.3R3-S4, * from 22.4 before 22.4R3-S3,  * from 23.2 before 23.2R2-S1,  * from 23.4 before 23.4R2;  Junos OS Evolved:  * All versions before 21.2R3-S8-EVO,  * from 21.4-EVO before 21.4R3-S8-EVO,  * from 22.2-EVO before 22.2R3-S4-EVO,  * from 22.3-EVO before 22.3R3-S4-EVO, * from 22.4-EVO before 22.4R3-S3-EVO,  * from 23.2-EVO before 23.2R2-S1-EVO,  * from 23.4-EVO before 23.4R2-EVO.

The weakness was published by Craig Dods as JSA88102. The advisory is shared for download at supportportal.juniper.net. This vulnerability is handled as CVE-2024-39525 since 06/25/2024. The exploitation is known to be easy. The attack may be launched remotely. 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 01/24/2026).

The vulnerability scanner Nessus provides a plugin with the ID 209273 (Juniper Junos OS DoS (JSA88102)), which helps to determine the existence of the flaw in a target environment.

Upgrading eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (209273). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

• Router Operating System

Vendor

• Juniper

Name

• Junos OS
• Junos OS Evolved

License

• commercial

Website

• Vendor: https://www.juniper.net/

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Entryinfo

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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