CVE-2020-3204: Cisco IOS and IOS XE Software Tcl Arbitrary Code Execution Vulnerability
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.
Affected Software
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Event History
Frequently Asked Questions
What is the severity of CVE-2020-3204?
CVE-2020-3204 has a critical severity rating, allowing authenticated local users to execute arbitrary code at a privileged level.
How do I fix CVE-2020-3204?
To fix CVE-2020-3204, install the appropriate Cisco IOS or IOS XE software upgrade as recommended in the advisory.
What versions are affected by CVE-2020-3204?
CVE-2020-3204 affects multiple versions of Cisco IOS and IOS XE, particularly versions 12.2(6)i1 and 12.2(33)sre and their variants.
Can an attacker exploit CVE-2020-3204 remotely?
No, an attacker must have local access with privileged EXEC credentials to exploit CVE-2020-3204.
What type of vulnerability is CVE-2020-3204?
CVE-2020-3204 is a code execution vulnerability in the Tool Command Language (Tcl) interpreter in Cisco IOS software.