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CVE-2022-22239

Junos OS Evolved: The ssh CLI command always runs as root which can lead to privilege escalation

High8.2EPSS 0.19%
Published
Updated
Reserved
Assigned by
juniper

Description

An Execution with Unnecessary Privileges vulnerability in Management Daemon (mgd) of Juniper Networks Junos OS Evolved allows a locally authenticated attacker with low privileges to escalate their privileges on the device and potentially remote systems. This vulnerability allows a locally authenticated attacker with access to the ssh operational command to escalate their privileges on the system to root, or if there is user interaction on the local device to potentially escalate privileges on a remote system to root. This issue affects Juniper Networks Junos OS Evolved: All versions prior to 20.4R3-S5-EVO; 21.1-EVO versions prior to 21.1R3-EVO; 21.2-EVO versions prior to 21.2R2-S1-EVO, 21.2R3-EVO; 21.3-EVO versions prior to 21.3R2-EVO. This issue does not affect Juniper Networks Junos OS.

Scores

CVSS scores of CVE-2022-22239, by who scored it
Scored byCVSSScoreVector
juniperCNA (assigner)3.1High8.2CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H
NVDNVD · Modified3.1High8.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
EPSS (exploitation in 30 days)
0.19% · top 91% of all CVEs (5 Nov 2026)
CISA SSVC
Exploitation: none · Automatable: no · Technical impact: total
Loading the EPSS history…

The list uses the assigner's score when there is one, then CISA's, then NVD's: High 8.2.

Weakness

Affected products

  • Juniper Networks · Junos OS Evolved

    • affected unspecified – < 20.4R3-S5-EVO
    • affected 21.1-EVO – < 21.1R3-EVO
    • affected 21.2-EVO – < 21.2R2-S1-EVO, 21.2R3-EVO
    • affected 21.3-EVO – < 21.3R2-EVO

What to do

Solution: The following software releases have been updated to resolve this specific issue: 20.4R3-S5-EVO, 21.1R3-EVO, 21.2R2-S1-EVO, 21.2R3-EVO, 21.3R2-EVO, 21.4R1-EVO, and all subsequent releases.

Workaround: A workaround for this issue is to modify the applicable login class(es) so that the ssh command can not be accessed anymore. This can be done by removing the 'network' permission or modifying the resp. allow-/deny-commands configuration.

Exploitation: Juniper SIRT is not aware of any malicious exploitation of this vulnerability.

References (1)

Sources

The same CVE in the primary databases and aggregators, to check against.

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Record last updated .