CVE-2022-22224

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

Published Oct 18, 2022 CVSS 3.1 · 6.5 Medium EPSS < 1% KEV · Not listed
Description
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.

Remediation

Vendor Solution

The following software releases have been updated to resolve this specific issue: Junos OS: 19.1R3-S9, 19.2R3-S5, 19.3R3-S3, 19.4R3-S9, 20.1R3, 20.2R3-S1, 20.3R3, 20.4R3, 21.1R2, 21.2R1, and all subsequent releases. Junos OS Evolved: 20.4R3-S3-EVO, 21.1R2-EVO, 21.2R1-EVO, and all subsequent releases.


Vendor Workaround

There are no viable workarounds for this issue. However, service can be restored by restarting the PPMD process from the Junos shell: First, identify the PID for the daemon. root@Junos:~ # ps -aux | grep "[p]pm" root 73848 0.0 0.0 740624 14072 - S 29Apr22 20:53.61 /usr/sbin/ppmd -N Second, kill the process. root@Junos:~ # kill -9 73848

Tracking

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Advisories

Source ID Title
EUVD EUVD EUVD-2022-27371 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.
References
History
Type Values Removed Values Added
Metrics epss

{'score': 0.00081}

epss

{'score': 0.0009}

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
juniper
Published
Updated
May 12, 2025, 2:42 PM
Reserved
Dec 21, 2021, 12:00 AM
Status
Modified
Published
Oct 18, 2022, 3:15 AM
Modified
Jun 17, 2026, 4:28 AM