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).

The version of Junos OS installed on the remote host is affected by a vulnerability as referenced in the JSA100050 advisory.

  - 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. (CVE-2025-52946)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Detections

Analytics

CVE-2025-52946

high

Tenable Plugins

high