Junos OS and Junos OS Evolved: Concurrent deletion of a routing-instance and receipt of an SNMP request cause an RPD crash

Summary

A Use After Free vulnerability in the Routing Protocol Daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows an authenticated, network-based attacker to cause a Denial of Service (DoS).On all Junos OS and Junos Evolved platforms, if a routing-instance deactivation is triggered, and at the same time a specific SNMP request is received, a segmentation fault occurs which causes rpd to crash and restart. This issue affects:    Junos OS: • All versions before 21.2R3-S8,  • 21.4 versions before 21.4R3-S5, • 22.2 versions before 22.2R3-S3, • 22.3 versions before 22.3R3-S2, • 22.4 versions before 22.4R3, • 23.2 versions before 23.2R2.   Junos OS Evolved: • All versions before 21.2R3-S8-EVO, • 21.4-EVO versions before 21.4R3-S5-EVO, • 22.2-EVO versions before 22.2R3-S3-EVO,  • 22.3-EVO versions before 22.3R3-S2-EVO, • 22.4-EVO versions before 22.4R3-EVO, • 23.2-EVO versions before 23.2R2-EVO.

Timeline

1. Jul 11, 2024, 4:02 PM UTCCVE published
2. Jul 11, 2024, 6:58 PM UTCCISA SSVC assessment

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

3. Aug 2, 2024, 4:26 AM UTCRecord last updated

Affected versions

• Juniper Networks Junos OS

  fixed in 21.2R3-S8; From 21.4 · fixed in 21.4R3-S5; From 22.2 · fixed in 22.2R3-S3; From 22.3 · fixed in 22.3R3-S2; From 22.4 · fixed in 22.4R3; From 23.2 · fixed in 23.2R2

• Juniper Networks Junos OS Evolved

  fixed in 21.2R3-S8-EVO; From 21.4-EVO · fixed in 21.4R3-S5-EVO; From 22.2-EVO · fixed in 22.2R3-S3-EVO; From 22.3-EVO · fixed in 22.3R3-S2-EVO; From 22.4-EVO · fixed in 22.4R3-EVO; From 23.2-EVO · fixed in 23.2R2-EVO

References 1