CVE-2024-39552

An Improper Handling of Exceptional Conditions vulnerability in the routing protocol daemon (RPD) of Juniper Networks Junos OS and Junos OS Evolved allows a network based, unauthenticated attacker to cause the RPD process to crash leading to a Denial of Service (DoS).

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

Continuous receipt of the malformed BGP UPDATE messages will create a sustained Denial of Service (DoS) condition for impacted devices.

This issue affects eBGP and iBGP, in both IPv4 and IPv6 implementations. This issue requires a remote attacker to have at least one established BGP session.

This issue affects:

Juniper Networks Junos OS:

• All versions earlier than 20.4R3-S9;
• 21.2 versions earlier than 21.2R3-S7;
• 21.3 versions earlier than 21.3R3-S5;
• 21.4 versions earlier than 21.4R3-S6;
• 22.1 versions earlier than 22.1R3-S4;
• 22.2 versions earlier than 22.2R3-S3;
• 22.3 versions earlier than 22.3R3-S2;
• 22.4 versions earlier than 22.4R3;
• 23.2 versions earlier than 23.2R2.

Juniper Networks Junos OS Evolved:

• All versions earlier than 21.2R3-S7;
• 21.3-EVO versions earlier than 21.3R3-S5;
• 21.4-EVO versions earlier than 21.4R3-S8;
• 22.1-EVO versions earlier than 22.1R3-S4;
• 22.2-EVO versions earlier than 22.2R3-S3;
• 22.3-EVO versions earlier than 22.3R3-S2;
• 22.4-EVO versions earlier than 22.4R3;
• 23.2-EVO versions earlier than 23.2R2.

Weakness

The product does not handle or incorrectly handles an exceptional condition.

References

• https://supportportal.juniper.net/JSA75726