Junos OS and Junos OS Evolved: A malformed BGP tunnel encapsulation attribute will lead to an rpd crash

Summary

An Improper Validation of Specified Type of Input vulnerability in Routing Protocol Daemon (RPD) of Junos OS and Junos OS Evolved allows an unauthenticated, network-based attacker to cause Denial of Service (DoS). If a BGP update is received over an established BGP session which contains a tunnel encapsulation attribute with a specifically malformed TLV, rpd will crash and restart. This issue affects: Junos OS: • all versions before 21.2R3-S7,  • from 21.3 before 21.3R3-S5,  • from 21.4 before 21.4R3-S5,  • from 22.1 before 22.1R3-S5,  • from 22.2 before 22.2R3-S3,  • from 22.3 before 22.3R3-S2,  • from 22.4 before 22.4R3,  • from 23.2 before 23.2R1-S2, 23.2R2. Junos OS Evolved: • all versions before 21.2R3-S7-EVO,  • from 21.3-EVO before 21.3R3-S5-EVO,  • from 21.4-EVO before 21.4R3-S5-EVO,  • from 22.2-EVO before 22.2R3-S3-EVO,  • from 22.3-EVO before 22.3R3-S2-EVO,  • from 22.4-EVO before 22.4R3-EVO,  • from 23.2-EVO before 23.2R1-S2-EVO, 23.2R2-EVO. This is a related but separate issue than the one described in JSA75739

Timeline

1. Apr 12, 2024, 3:07 PM UTCCVE published
2. Apr 12, 2024, 5:13 PM UTCCISA SSVC assessment

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

3. Aug 2, 2024, 1:32 AM UTCRecord last updated

Affected versions

• Juniper Networks Junos OS

  fixed in 21.2R3-S7; From 21.3 · fixed in 21.3R3-S5; From 21.4 · fixed in 21.4R3-S5; From 22.1 · fixed in 22.1R3-S5; From 22.2 · fixed in 22.2R3-S3; From 22.3 · fixed in 22.3R3-S2; From 22.4 · fixed in 22.4R3

• Juniper Networks Junos OS Evolved

  fixed in 21.2R3-S7-EVO; From 21.3-EVO · fixed in 21.3R3-S5-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

References 2