Vulnerability · Published Jun 3, 2020 · Assigned by cisco

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

Medium 6.7

In plain English

A medium-severity improper input validation in Cisco IOS 12.2(53)SE1 from Cisco. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 32% of all known vulnerabilities).

Severity (CVSS 3.0)6.7Medium

Exploit odds (30 days)0.4%top 68.0% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

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 products (as reported)

Vendor	Product	Versions
Cisco	Cisco IOS 12.2(53)SE1	n/a

Weakness: CWE-20 · Vector: CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

References

20200603 Cisco IOS and IOS XE Software Tcl Arbitrary Code Execution Vulnerability vendor-advisory, x_refsource_CISCO