Junos OS and Junos OS Evolved: With certain BGP options enabled, receipt of specifically malformed BGP update causes RPD crash

An Out-of-Bounds Read vulnerability in

the routing protocol daemon (rpd) of

Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated network-based attacker sending a specifically malformed BGP packet to cause rpd to crash and restart, resulting in a Denial of Service (DoS). Continued receipt and processing of this packet will create a sustained Denial of Service (DoS) condition.

This issue only affects systems configured in either of two ways:

• systems with BGP traceoptions enabled

* systems with BGP traffic engineering configured

This issue can affect iBGP and eBGP with

any address family

configured. The specific attribute involved is non-transitive, and will not propagate across a network.

This issue affects:

Junos OS:

• All versions before 21.4R3-S8,
• 22.2 before 22.2R3-S5,
• 22.3 before 22.3R3-S4,
• 22.4 before 22.4R3-S3,
• 23.2 before 23.2R2-S2,
• 23.4 before 23.4R2;

Junos OS Evolved:

• All versions before 21.4R3-S8-EVO,
• 22.2-EVO before 22.2R3-S5-EVO,
• 22.3-EVO before 22.3R3-S4-EVO,
• 22.4-EVO before 22.4R3-S3-EVO,
• 23.2-EVO before 23.2R2-S2-EVO,
• 23.4-EVO before 23.4R2-EVO.