#VU49550 Execution with unnecessary privileges in Juniper Junos OS - CVE-2021-0223 

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Main Vulnerability Database Vulnerabilities #VU49550

#VU49550 Execution with unnecessary privileges in Juniper Junos OS - CVE-2021-0223

Published: January 15, 2021


Vulnerability identifier: #VU49550
Vulnerability risk: Low
CVSSv4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2021-0223
CWE-ID: CWE-250
Exploitation vector: Local access
Exploit availability: No public exploit available
Vulnerable software:
Juniper Junos OS
Software vendor:
Juniper Networks, Inc.

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to application binary telnetd.real has a setuid bit. A local low-privileged user can run the affected binary and execute arbitrary code on the system with root privileges.


Remediation

Install updates from vendor's website.

This issue affects Juniper Networks Junos OS:

  • all versions prior to 15.1R7-S9;
  • 17.3 versions prior to 17.3R3-S11;
  • 17.4 versions prior to 17.4R2-S12, 17.4R3-S3;
  • 18.1 versions prior to 18.1R3-S11;
  • 18.2 versions prior to 18.2R3-S6;
  • 18.3 versions prior to 18.3R3-S4;
  • 18.4 versions prior to 18.4R2-S7, 18.4R3-S6;
  • 19.1 versions prior to 19.1R2-S2, 19.1R3-S4;
  • 19.2 versions prior to 19.2R1-S6, 19.2R3-S1;
  • 19.3 versions prior to 19.3R3-S1;
  • 19.4 versions prior to 19.4R2-S2, 19.4R3-S1;
  • 20.1 versions prior to 20.1R1-S4, 20.1R2;
  • 20.2 versions prior to 20.2R2.

External links