Junos OS and Junos OS Evolved: PPMD goes into infinite loop upon receipt of malformed OSPF TLV

Summary

An Improper Check or Handling of Exceptional Conditions vulnerability in the processing of a malformed OSPF TLV in Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated adjacent attacker to cause the periodic packet management daemon (PPMD) process to go into an infinite loop, which in turn can cause protocols and functions reliant on PPMD such as OSPF neighbor reachability to be impacted, resulting in a sustained Denial of Service (DoS) condition. The DoS condition persists until the PPMD process is manually restarted. This issue affects: Juniper Networks Junos OS: All versions prior to 19.1R3-S9; 19.2 versions prior to 19.2R3-S5; 19.3 versions prior to 19.3R3-S3; 19.4 versions prior to 19.4R3-S9; 20.1 versions prior to 20.1R3; 20.2 versions prior to 20.2R3-S1; 20.3 versions prior to 20.3R3; 20.4 versions prior to 20.4R3; 21.1 versions prior to 21.1R2. Juniper Networks Junos OS Evolved: All versions prior to 20.4R3-S3-EVO; 21.1 versions prior to 21.1R2-EVO.

Timeline

1. Oct 18, 2022, 2:46 AM UTCCVE published
2. May 12, 2025, 2:42 PM UTCCISA SSVC assessment

   Exploitation: none · Automatable: no · Technical impact: partial

3. May 12, 2025, 2:42 PM UTCRecord last updated

Affected versions

• Juniper Networks Junos OS

  fixed in 19.1R3-S9; From 19.2 · fixed in 19.2R3-S5; From 19.3 · fixed in 19.3R3-S3; From 19.4 · fixed in 19.4R3-S9; From 20.1 · fixed in 20.1R3; From 20.2 · fixed in 20.2R3-S1; From 20.3 · fixed in 20.3R3; From 20.4 · fixed in 20.4R3; From 21.1 · fixed in 21.1R2

• Juniper Networks Junos OS Evolved

  fixed in 20.4R3-S3-EVO; From 21.1 · fixed in 21.1R2-EVO

References 1