A Use After Free vulnerability in the routing protocol daemon (rpd) of Juniper Networks Junos OS and Juniper Networks Junos OS Evolved allows an attacker sending a BGP update with a specifically malformed AS PATH to cause rpd to crash, resulting in a Denial of Service (DoS). Continuous receipt of the malformed AS PATH attribute will cause a sustained DoS condition.
On all Junos OS and Junos OS Evolved platforms, the rpd process will crash and restart when a specifically malformed AS PATH is received within a BGP update and traceoptions are enabled.
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 impacted by this issue.
This issue affects:
 Junos OS:
  *  All versions before 21.2R3-S9, 
  *  all versions of 21.4,
  *  from 22.2 before 22.2R3-S6, 
  *  from 22.4 before 22.4R3-S5, 
  *  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 before 22.4R3-S5-EVO, 
  *  from 23.2-EVO before 23.2R2-S3-EVO, 
  *  from 23.4-EVO before 23.4R2-S4-EVO, 
  *  from 24.2-EVO before 24.2R2-EVO.
This is a more complete fix for previously published CVE-2024-39549 (JSA83011).
                
            Metrics
Affected Vendors & Products
References
        | Link | Providers | 
|---|---|
| https://supportportal.juniper.net/JSA100050 |     | 
History
                    Sat, 12 Jul 2025 13:45:00 +0000
| Type | Values Removed | Values Added | 
|---|---|---|
| Metrics | epss 
 | 
Fri, 11 Jul 2025 16:15:00 +0000
| Type | Values Removed | Values Added | 
|---|---|---|
| Metrics | ssvc 
 | 
Fri, 11 Jul 2025 15:00:00 +0000
| Type | Values Removed | Values Added | 
|---|---|---|
| Description | A Use After Free vulnerability in the routing protocol daemon (rpd) of Juniper Networks Junos OS and Juniper Networks Junos OS Evolved allows an attacker sending a BGP update with a specifically malformed AS PATH to cause rpd to crash, resulting in a Denial of Service (DoS). Continuous receipt of the malformed AS PATH attribute will cause a sustained DoS condition. On all Junos OS and Junos OS Evolved platforms, the rpd process will crash and restart when a specifically malformed AS PATH is received within a BGP update and traceoptions are enabled. 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 impacted by this issue. This issue affects: Junos OS: * All versions before 21.2R3-S9, * all versions of 21.4, * from 22.2 before 22.2R3-S6, * from 22.4 before 22.4R3-S5, * 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 before 22.4R3-S5-EVO, * from 23.2-EVO before 23.2R2-S3-EVO, * from 23.4-EVO before 23.4R2-S4-EVO, * from 24.2-EVO before 24.2R2-EVO. This is a more complete fix for previously published CVE-2024-39549 (JSA83011). | |
| Title | Junos OS and Junos OS Evolved: With traceoptions enabled, receipt of malformed AS PATH causes RPD crash | |
| Weaknesses | CWE-416 | |
| References |  | |
| Metrics | cvssV3_1 
 
 | 
 MITRE
                        MITRE
                    Status: PUBLISHED
Assigner: juniper
Published: 2025-07-11T14:39:59.014Z
Updated: 2025-07-11T15:25:30.605Z
Reserved: 2025-06-23T13:16:01.408Z
Link: CVE-2025-52946
 Vulnrichment
                        Vulnrichment
                    Updated: 2025-07-11T15:25:26.018Z
 NVD
                        NVD
                    Status : Awaiting Analysis
Published: 2025-07-11T15:15:24.823
Modified: 2025-07-15T13:14:49.980
Link: CVE-2025-52946
 Redhat
                        Redhat
                    No data.