Summaryinfo

A vulnerability, which was classified as critical, has been found in Juniper Networks Junos OS and Junos OS Evolved. This issue affects some unknown processing of the component Routing Protocol Daemon. The manipulation leads to buffer overflow. The identification of this vulnerability is CVE-2024-39543. The attack can only be done within the local network. There is no exploit available. It is recommended to upgrade the affected component. Once again VulDB remains the best source for vulnerability data.

Detailsinfo

A vulnerability classified as critical was found in Juniper Networks Junos OS and Junos OS Evolved (version unknown). This vulnerability affects an unknown function of the component Routing Protocol Daemon. The manipulation with an unknown input leads to a buffer overflow vulnerability. The CWE definition for the vulnerability is CWE-120. The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow. As an impact it is known to affect availability. CVE summarizes:

A Buffer Copy without Checking Size of Input vulnerability in the routing protocol daemon (rpd) of Juniper Networks Junos OS and Juniper Networks Junos OS Evolved allows an unauthenticated, adjacent attacker to send specific RPKI-RTR packets resulting in a crash, creating a Denial of Service (DoS) condition. Continued receipt and processing of this packet will create a sustained Denial of Service (DoS) condition. 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-S3,  * from 22.4 before 22.4R3-S2,  * 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 before 21.4R3-S8-EVO, * from 22.2 before 22.2R3-S4-EVO,  * from 22.3 before 22.3R3-S3-EVO, * from 22.4 before 22.4R3-S2-EVO,  * from 23.2 before 23.2R2-S1-EVO, * from 23.4 before 23.4R2-EVO.

The advisory is shared for download at supportportal.juniper.net. This vulnerability was named CVE-2024-39543 since 06/25/2024. The exploitation appears to be easy. The attack needs to approached within the local network. No form of authentication is required for a successful 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 07/11/2024).

Upgrading eliminates this vulnerability.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

• Router Operating System

Vendor

• Juniper Networks

Name

• Junos OS
• Junos OS Evolved

License

• commercial

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