Vulnerability · Published Jun 3, 2020 · Assigned by cisco

CVE-2020-3201Cisco IOS and IOS XE Software Tcl Denial of Service Vulnerability

Medium 6.0

In plain English

A medium-severity improper input validation in Cisco IOS 12.2(25)S from Cisco. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 24% of all known vulnerabilities).

Severity (CVSS 3.0)6.0Medium

Exploit odds (30 days)0.3%top 75.8% 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 cause a denial of service (DoS) condition on an affected system. The vulnerability is due to insufficient input validation of data passed to the Tcl interpreter. An attacker could exploit this vulnerability by executing crafted Tcl arguments on an affected device. An exploit could allow the attacker to cause the affected device to reload, resulting in a DoS condition.

Affected products (as reported)

Vendor	Product	Versions
Cisco	Cisco IOS 12.2(25)S	n/a

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

References

20200603 Cisco IOS and IOS XE Software Tcl Denial of Service Vulnerability vendor-advisory, x_refsource_CISCO