CVE-2025-52955
Unknown Unknown - Not Provided
BaseFortify

Publication date: 2025-07-11

Last updated on: 2025-08-20

Assigner: Juniper Networks, Inc.

Description
An Incorrect Calculation of Buffer Size vulnerability in the routing protocol daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows an adjacent unauthenticated attacker to cause a memory corruption that leads to a rpd crash.  When the logical interface using a routing instance flaps continuously, specific updates are sent to the jflow/sflow modules. This results in memory corruption, leading to an rpd crash and restart.  Continued receipt of these specific updates will cause a sustained Denial of Service condition. This issue affects Junos OS: * All versions before 21.2R3-S9, * All versions of 21.4, * All versions of 22.2, * from 22.4 before 22.4R3-S7, * from 23.2 before 23.2R2-S3, * from 23.4 before 23.4R2-S4, * from 24.2 before 24.2R2. Junos OS Evolved:  * All versions of 21.2-EVO,  * All versions of 21.4-EVO,  * All versions of 22.2-EVO,  * from 22.4 before 22.4R3-S7-EVO,  * from 23.2 before 23.2R2-S3-EVO,  * from 23.4 before 23.4R2-S4-EVO,  * from 24.2 before 24.2R2-EVO.
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Meta Information
Published
2025-07-11
Last Modified
2025-08-20
Generated
2026-05-07
AI Q&A
2025-07-11
EPSS Evaluated
2026-05-05
NVD
CVE-2025-52955
Affected Vendors & Products
Showing 2 associated CPEs
Vendor Product Version / Range
juniper junos_os_evolved *
juniper junos_os *
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-131 The product does not correctly calculate the size to be used when allocating a buffer, which could lead to a buffer overflow.
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?

This vulnerability is an Incorrect Calculation of Buffer Size in the routing protocol daemon (rpd) of Juniper Networks Junos OS. It allows an adjacent unauthenticated attacker to cause memory corruption by exploiting specific updates sent when a logical interface using a routing instance flaps continuously. This memory corruption leads to an rpd crash and restart.


How can this vulnerability impact me? :

The vulnerability can cause a sustained Denial of Service (DoS) condition by repeatedly crashing and restarting the routing protocol daemon (rpd). This can disrupt network routing and availability, potentially impacting network stability and operations.


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