Junos OS and Junos OS Evolved: A specific CLI command will cause an RPD crash when rib-sharding and update-threading is enabled

Summary

An Improper Check for Unusual or Exceptional Conditions vulnerability in the Routing Protocol Daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows a local, low-privileged attacker to cause a Denial-of-Service (DoS). When a specific "show bgp neighbor" CLI command is run, the rpd cpu utilization rises and eventually causes a crash and restart. Repeated use of this command will cause a sustained DoS condition.  The device is only affected if BGP RIB sharding and update-threading is enabled. This issue affects Junos OS:  • All versions before 21.2R3-S9,  • from 21.4 before 21.4R3-S8, • from 22.2 before 22.2R3-S6,  • from 22.4 before 22.4R3-S2,  • from 23.2 before 23.2R2-S3,  • from 23.4 before 23.4R2. and Junos OS Evolved:  • All versions before 21.2R3-S9-EVO,  • from 21.4-EVO before 21.4R3-S8-EVO,  • from 22.2-EVO before 22.2R3-S6-EVO,  • from 22.4-EVO before 22.4R3-S2-EVO,  • from 23.2-EVO before 23.2R2-S3-EVO,  • from 23.4-EVO before 23.4R2-EVO.

Timeline

1. Apr 9, 2025, 8:01 PM UTCCVE published
2. Apr 9, 2025, 8:30 PM UTCCISA SSVC assessment

   Exploitation: none · Automatable: no · Technical impact: partial

3. Apr 9, 2025, 8:35 PM UTCRecord last updated

Affected versions

• Juniper Networks Junos OS

  fixed in 21.2R3-S9; From 21.4 · fixed in 21.4R3-S8; From 22.2 · fixed in 22.2R3-S6; From 22.4 · fixed in 22.4R3-S2; From 23.2 · fixed in 23.2R2-S3; From 23.4 · fixed in 23.4R2

• Juniper Networks Junos OS Evolved

  fixed in 21.2R3-S9-EVO; From 21.4-EVO · fixed in 21.4R3-S8-EVO; From 22.2-EVO · fixed in 22.2R3-S6-EVO; From 22.4-EVO · fixed in 22.4R3-S2-EVO; From 23.2-EVO · fixed in 23.2R2-S3-EVO; From 23.4-EVO · fixed in 23.4R2-EVO

References 1