Junos OS and Junos OS Evolved: Receipt of a specific ICMPv6 packet causes a memory overrun leading to an rpd crash

Summary

A Buffer Access with Incorrect Length Value vulnerability in the routing protocol daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated, network-based attacker to cause a Denial of Service (DoS). When an attacker sends a specific ICMPv6 packet to an interface with "protocols router-advertisement" configured, rpd crashes and restarts. Continued receipt of this packet will cause a sustained DoS condition.  This issue only affects systems configured with IPv6. This issue affects Junos OS:  • All versions before 21.2R3-S9,  • from 21.4 before 21.4R3-S10, • from 22.2 before 22.2R3-S6, • from 22.4 before 22.4R3-S4, • from 23.2 before 23.2R2-S2, • from 23.4 before 23.4R2; and Junos OS Evolved: • All versions before 21.2R3-S9-EVO, • from 21.4-EVO before 21.4R3-S10-EVO, • from 22.2-EVO before 22.2R3-S6-EVO, • from 22.4-EVO before 22.4R3-S4-EVO, • from 23.2-EVO before 23.2R2-S2-EVO, • from 23.4-EVO before 23.4R2-EVO.

Timeline

1. Apr 9, 2025, 7:56 PM UTCCVE published
2. Apr 9, 2025, 8:36 PM UTCCISA SSVC assessment

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

3. Apr 9, 2025, 8:36 PM UTCRecord last updated

Affected versions

• Juniper Networks Junos OS

  fixed in 21.2R3-S9; From 21.4 · fixed in 21.4R3-S10; From 22.2 · fixed in 22.2R3-S6; From 22.4 · fixed in 22.4R3-S4; From 23.2 · fixed in 23.2R2-S2; 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-S10-EVO; From 22.2-EVO · fixed in 22.2R3-S6-EVO; From 22.4-EVO · fixed in 22.4R3-S4-EVO; From 23.2-EVO · fixed in 23.2R2-S2-EVO; From 23.4-EVO · fixed in 23.4R2-EVO

References 1