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Vulnerability · Published Apr 22, 2021 · Assigned by juniper

CVE-2021-0253Junos OS: NFX Series: Local Command Execution Vulnerability in JDMD Leads to Privilege Escalation

High 7.8

In plain English

A high-severity command injection in Junos OS from Juniper Networks. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 46% of all known vulnerabilities).

Severity (CVSS 3.1)7.8High
Exploit odds (30 days)0.5%top 54.1% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known

Official description

NFX Series devices using Juniper Networks Junos OS are susceptible to a local command execution vulnerability thereby allowing an attacker to elevate their privileges via the Junos Device Management Daemon (JDMD) process. This issue affects Juniper Networks Junos OS on NFX Series 17.2 version 17.2R1 and later versions prior to 18.3R3-S4; 18.4 versions prior to 18.4R2-S5, 18.4R3-S5; 19.1 versions prior to 19.1R1-S3; 19.2 version 19.1R2 and later versions prior to 19.2R3; 19.3 versions prior to 19.3R3; 19.4 versions prior to 19.4R2-S2. 19.4 versions 19.4R3 and above. This issue does not affect Juniper Networks Junos OS versions prior to 17.2R1. This issue does not affect the JDMD as used by Junos Node Slicing such as External Servers use in conjunction with Junos Node Slicing and In-Chassis Junos Node Slicing on MX480, MX960, MX2008, MX2010, MX2020.

Affected products (as reported)

VendorProductVersions
Juniper Networks Junos OS unspecified – before 18.3R3-S417.2R1 – before 17.2*18.4 – before 18.4R2-S5, 18.4R3-S519.1 – before 19.1R1-S319.1R2 – before 19.2*19.3 – before 19.3R319.4 – before 19.4R2-S2
Juniper Networks Junos OS see references

Weakness: CWE-77 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References