A Reachable Assertion vulnerability in Routing Protocol Daemon (RPD) of Juniper Networks Junos OS and Junos OS Evolved allows a locally-based, low-privileged attacker to cause a Denial of Service (DoS).

On all Junos OS and Junos OS Evolved, when a specific L2VPN command is run, RPD will crash and restart. Continued execution of this specific command will create a sustained Denial of Service (DoS) condition.

This issue affects:
Juniper Networks Junos OS
All versions prior to 19.3R3-S10;
20.1 versions prior to 20.1R3-S4;
20.2 versions prior to 20.2R3-S6;
20.3 versions prior to 20.3R3-S6;
20.4 versions prior to 20.4R3-S5;
21.1 versions prior to 21.1R3-S4;
21.2 versions prior to 21.2R3-S3;
21.3 versions prior to 21.3R3-S2;
21.4 versions prior to 21.4R3;
22.1 versions prior to 22.1R3;
22.2 versions prior to 22.2R2;
22.3 versions prior to 22.3R2;

Juniper Networks Junos OS Evolved
All versions prior to 20.4R3-S7-EVO;
21.1 versions prior to 21.1R3-S3-EVO;
21.2 versions prior to 21.2R3-S5-EVO;
21.3 versions prior to 21.3R3-S4-EVO;
21.4 versions prior to 21.4R3-EVO;
22.1 versions prior to 22.1R3-EVO;
22.2 versions prior to 22.2R2-EVO;
22.3 versions prior to 22.3R2-EVO;

References

• https://nvd.nist.gov/vuln/detail/CVE-2023-36840
• https://supportportal.juniper.net/JSA71647