An Improper Validation of Syntactic Correctness of Input vulnerability in Routing Protocol Daemon (rpd) Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated, network based attacker to cause a Denial of Service (DoS).

When a malformed BGP UPDATE packet is received over an established BGP session, the rpd crashes and restarts.

This issue affects both eBGP and iBGP implementations.

This issue affects:

Juniper Networks Junos OS

• 21.4 versions prior to 21.4R3-S4;
• 22.1 versions prior to 22.1R3-S3;
• 22.2 versions prior to 22.2R3-S2;
• 22.3 versions prior to 22.3R2-S2, 22.3R3;
• 22.4 versions prior to 22.4R2-S1, 22.4R3;
• 23.2 versions prior to 23.2R1, 23.2R2;

Juniper Networks Junos OS Evolved

• 21.4 versions prior to 21.4R3-S5-EVO;
• 22.1 versions prior to 22.1R3-S3-EVO;
• 22.2 versions prior to 22.2R3-S3-EVO;
• 22.3 versions prior to 22.3R2-S2-EVO;
• 22.4 versions prior to 22.4R3-EVO;
• 23.2 versions prior to 23.2R2-EVO;