Junos OS and Junos OS Evolved: Receipt of malformed BGP path attributes leads to a memory leak

Summary

A Missing Release of Memory after Effective Lifetime vulnerability in the routing process daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows an attacker to send a malformed BGP Path attribute update which allocates memory used to log the bad path attribute. This memory is not properly freed in all circumstances, leading to a Denial of Service (DoS). Consumed memory can be freed by manually restarting Routing Protocol Daemon (rpd). Memory utilization could be monitored by:  user@host> show system memory or show system monitor memory status 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-S3, • from 23.2 before 23.2R2-S1,  • from 23.4 before 23.4R1-S2, 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-S3-EVO, • from 23.2 before 23.2R2-S1-EVO, • from 23.4 before 23.4R1-S2-EVO, 23.4R2-EVO.

Timeline

1. Jul 11, 2024, 4:27 PM UTCCVE published
2. Feb 26, 2025, 6:16 PM UTCCISA SSVC assessment

   Exploitation: none · Automatable: yes · Technical impact: partial

3. Feb 26, 2025, 6:16 PM UTCRecord last updated

Affected versions

• Juniper Networks Junos OS

  fixed in 21.2R3-S8; From 21.4 · fixed in 21.4R3-S8; From 22.2 · fixed in 22.2R3-S4; From 22.3 · fixed in 22.3R3-S3; From 22.4 · fixed in 22.4R3-S3; From 23.2 · fixed in 23.2R2-S1

• Juniper Networks Junos OS Evolved

  fixed in 21.2R3-S8-EVO; From 21.4 · fixed in 21.4R3-S8-EVO; From 22.2 · fixed in 22.2R3-S4-EVO; From 22.3 · fixed in 22.3R3-S3-EVO; From 22.4 · fixed in 22.4R3-S3-EVO; From 23.2 · fixed in 23.2R2-S1-EVO

References 1