An Incorrect Permission Assignment for Critical Resource vulnerability in Juniper Networks Junos OS Evolved allows a local, authenticated low-privileged attacker to copy potentially malicious files into an existing Docker container on the local system. A follow-on administrator could then inadvertently start the Docker container leading to the malicious files being executed as root.

This issue only affects systems with Docker configured and enabled, which is not enabled by default. Systems without Docker started are not vulnerable to this issue.

This issue affects Juniper Networks Junos OS Evolved:

• 20.4 versions prior to 20.4R3-S5-EVO;
• 21.2 versions prior to 21.2R3-EVO;
• 21.3 versions prior to 21.3R3-EVO;
• 21.4 versions prior to 21.4R2-EVO.

This issue does not affect Juniper Networks Junos OS Evolved versions prior to 19.2R1-EVO.

Docker is started on Junos OS Evolved using the following command:

Likewise, the status of Docker running on the system can be confirmed using the following command:

root@evo# systemctl status docker
* docker.service - Docker Application Container Engine
Loaded: loaded (/lib/systemd/system/docker.service; disabled; vendor preset: enabled)
Active: active (running) since Tue 2023-04-11 14:44:29 PDT; 6s ago
...

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

This issue was found during internal product security testing or research.

This issue has been assigned CVE-2023-28960.
 

The following software releases have been updated to resolve this specific issue: Junos OS Evolved 20.4R3-S5-EVO, 21.2R3-EVO, 21.3R3-EVO, 21.4R2-EVO, 22.1R1-EVO, and all subsequent releases.

This issue is being tracked as 1621554

Note: Juniper SIRT's policy is not to evaluate releases which are beyond End of Engineering (EOE) or End of Life (EOL).
 

• 2023-04-12: Initial Publication.

• KB16613: Overview of the Juniper Networks SIRT Quarterly Security Bulletin Publication Process [juniper.net]
• KB16765: In which releases are vulnerabilities fixed? [juniper.net]
• KB16446: Common Vulnerability Scoring System (CVSS) and Juniper's Security Advisories [juniper.net]
• Report a Security Vulnerability - How to Contact the Juniper Networks Security Incident Response Team
• CVE-2023-28960 at cve.mitre.org