Cisco IOS Tcl DoS (cisco-sa-tcl-dos-MAZQUnMF)

Medium Nessus Plugin ID 137407


The remote device is missing a vendor-supplied security patch


According to its self-reported version, IOS is affected by a vulnerability in the Tool Command Line (Tcl) interpreter due to insufficient input validation of data passed to the Tcl interpreter. An authenticated, unprivileged, and local attacker can exploit this, by executing crafted Tcl arguments on an affected device, in order to cause a denial of service (DoS) condition on an affected system.

Please see the included Cisco BIDs and Cisco Security Advisory for more information.


Upgrade to the relevant fixed version referenced in Cisco bug ID CSCvq28110

See Also

Plugin Details

Severity: Medium

ID: 137407

File Name: cisco-sa-tcl-dos-MAZQUnMF-ios.nasl

Version: 1.6

Type: local

Family: CISCO

Published: 2020/06/17

Updated: 2020/06/23

Dependencies: 47864

Risk Information

Risk Factor: Medium

CVSS Score Source: CVE-2020-3201

CVSS v2.0

Base Score: 4.9

Temporal Score: 3.6

Vector: CVSS2#AV:L/AC:L/Au:N/C:N/I:N/A:C

Temporal Vector: CVSS2#E:U/RL:OF/RC:C

CVSS v3.0

Base Score: 6

Temporal Score: 5.2

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

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:cisco:ios

Required KB Items: Host/Cisco/IOS/Version

Exploit Ease: No known exploits are available

Patch Publication Date: 2020/06/03

Vulnerability Publication Date: 2020/06/03

Reference Information

CVE: CVE-2020-3201


CISCO-SA: cisco-sa-tcl-dos-MAZQUnMF

IAVA: 2020-A-0239

CWE: 20