CVE-2023-28966

Junos OS Evolved: Local low-privileged user with shell access can execute CLI commands as root

Description

An Incorrect Default Permissions vulnerability in Juniper Networks Junos OS Evolved allows a low-privileged local attacker with shell access to modify existing files or execute commands as root. The issue is caused by improper file and directory permissions on certain system files, allowing an attacker with access to these files and folders to inject CLI commands as root. This issue affects Juniper Networks Junos OS Evolved: All versions prior to 20.4R3-S5-EVO; 21.2 versions prior to 21.2R3-EVO; 21.3 versions prior to 21.3R2-EVO.

Remediation

Solution:

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

Workaround:

  • Limit access to the system shell from trusted administrators only.

Category

7.8
CVSS
Severity: High
CVSS 3.1 •
EPSS 0.03%
Vendor Advisory juniper.net
Affected: Juniper Networks Junos OS Evolved
Published at:
Updated at:

References

Link Tags
https://supportportal.juniper.net/JSA70590 vendor advisory

Frequently Asked Questions

What is the severity of CVE-2023-28966?
CVE-2023-28966 has been scored as a high severity vulnerability.
How to fix CVE-2023-28966?
To fix CVE-2023-28966: The following software releases have been updated to resolve this specific issue: Junos OS Evolved 20.4R3-S5-EVO, 21.2R3-EVO, 21.3R2-EVO, 21.4R1-EVO, and all subsequent releases.
Is CVE-2023-28966 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2023-28966 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2023-28966?
CVE-2023-28966 affects Juniper Networks Junos OS Evolved.
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