CVE-2024-30397

An Improper Check for Unusual or Exceptional Conditions vulnerability in the thePublic Key Infrastructure daemon (pkid) of Juniper Networks Junos OS allows an unauthenticated networked attacker to cause Denial of Service (DoS).

The pkid is responsible for the certificate verification. Upon a failed verification, the pkid uses all CPU resources and becomes unresponsive to future verification attempts. This means that all subsequent VPN negotiations depending on certificate verification will fail.

This CPU utilization of pkid can be checked using this command: 
 root@srx> show system processes extensive | match pkid
 xxxxx root 103 0 846M 136M CPU1 1569:00 100.00% pkid

This issue affects:
Juniper Networks Junos OS
  *  Allversions prior to 20.4R3-S10;
  *  21.2 versions prior to 21.2R3-S7;
  *  21.4 versions prior to 21.4R3-S5;
  *  22.1 versions prior to 22.1R3-S4;
  *  22.2 versions prior to22.2R3-S3;
  *  22.3 versions prior to22.3R3-S1;
  *  22.4 versions prior to22.4R3;
  *  23.2 versions prior to23.2R1-S2, 23.2R2.