Juniper Junos OS on PTX1000/PTX10002-60C chassisd/dfwd race condition

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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A vulnerability was found in Juniper Junos OS on PTX1000/PTX10002-60C (Router Operating System) (version now known) and classified as problematic. Affected by this issue is some unknown processing of the component chassisd/dfwd. The manipulation with an unknown input leads to a race condition vulnerability. Using CWE to declare the problem leads to CWE-362. The program contains a code sequence that can run concurrently with other code, and the code sequence requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence that is operating concurrently. Impacted is confidentiality, integrity, and availability.

The weakness was disclosed 10/20/2021 as KB10956. The advisory is shared for download at This vulnerability is handled as CVE-2021-31382 since 04/15/2021. There are neither technical details nor an exploit publicly available.

Upgrading eliminates this vulnerability.






  • commercial

CPE 2.3info

CPE 2.2info


VulDB Meta Base Score: 6.0
VulDB Meta Temp Score: 5.9

VulDB Base Score: 5.6
VulDB Temp Score: 5.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

CNA Base Score: 6.5
CNA Vector (Juniper Networks, Inc.): 🔍



VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍


Class: Race condition
CWE: CWE-362
ATT&CK: Unknown

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍


Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍


Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍


04/15/2021 🔍
10/20/2021 +188 days 🔍
10/20/2021 +0 days 🔍
10/27/2021 +7 days 🔍



Advisory: KB10956
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2021-31382 (🔍)


Created: 10/20/2021 09:50 AM
Updated: 10/27/2021 03:53 PM
Changes: 10/20/2021 09:50 AM (50), 10/27/2021 03:48 PM (1), 10/27/2021 03:53 PM (1)
Complete: 🔍


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