#VU53746 Improper Authorization in Cisco Virtualized Packet Core and Cisco StarOS - CVE-2021-1539
Published: June 2, 2021
Vulnerability identifier: #VU53746
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2021-1539
CWE-ID: CWE-285
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
Cisco Virtualized Packet Core
Cisco StarOS
Cisco Virtualized Packet Core
Cisco StarOS
Software vendor:
Cisco Systems, Inc
Cisco Systems, Inc
Description
The vulnerability allows a remote user to gain unauthorized access to the system.
The vulnerability exists in the authorization process of Cisco ASR 5000 Series Software (StarOS) due to incorrect authorization of non-interactive CLI commands. A remote authenticate user can bypass TACACS authorization by sending a crafted Secure Shell (SSH) request to an affected device and execute a certain CLI commands.
Successful exploitation of the vulnerability may result in unauthorized access to sensitive information or denial of service condition.
Remediation
Install updates from vendor's website.