CVE-2020-3204 MEDIUM

CVE-2020-3204: Cisco IOS and IOS XE Software Tcl Arbitrary Code Execution Vulnerability

Vendor Cisco
Product Cisco IOS 12.2(53)SE1
Weakness CWE-20 · Input validation
Published June 3, 2020
Last update November 15, 2024

CVSS base score

6.7/10
Attack vector Local
Attack complexity Low
Privileges required High
User interaction None
Confidentiality High
Integrity High

CVSS vector

CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

What the vulnerability does

01Description

A vulnerability in the Tool Command Language (Tcl) interpreter of Cisco IOS Software and Cisco IOS XE Software could allow an authenticated, local attacker with privileged EXEC credentials to execute arbitrary code on the underlying operating system (OS) with root privileges. The vulnerability is due to insufficient input validation of data passed to the Tcl interpreter. An attacker could exploit this vulnerability by loading malicious Tcl code on an affected device. A successful exploit could allow the attacker to cause memory corruption or execute the code with root privileges on the underlying OS of the affected device.

Key dates

02Disclosure timeline

June 3, 2020 CVE published
November 15, 2024 Record updated