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CVE-2017-12336

Affected software2 products, listed below
Severity4.2 Medium CVSS 3.0 2 scores
WeaknessImproper input validation (CWE-20)
Published30 Nov 2017
Updated17 Jun 2026

Description

A vulnerability in the TCL scripting subsystem of Cisco NX-OS System Software could allow an authenticated, local attacker to escape the interactive TCL shell and gain unauthorized access to the underlying operating system of the device. The vulnerability exists due to insufficient input validation of user-supplied files passed to the interactive TCL shell of the affected device. An attacker could exploit this vulnerability to escape the scripting sandbox and execute arbitrary commands on the underlying operating system with the privileges of the authenticated user. To exploit this vulnerability, an attacker must have local access and be authenticated to the targeted device with administrative or tclsh execution privileges. This vulnerability affects the following products running Cisco NX-OS System Software: Multilayer Director Switches, Nexus 2000 Series Fabric Extenders, Nexus 3000 Series Switches, Nexus 3500 Platform Switches, Nexus 5000 Series Switches, Nexus 5500 Platform Switches, Nexus 5600 Platform Switches, Nexus 6000 Series Switches, Nexus 7000 Series Switches, Nexus 7700 Series Switches, Nexus 9000 Series Switches in standalone NX-OS mode, Nexus 9500 R-Series Line Cards and Fabric Modules, Unified Computing System Manager. Cisco Bug IDs: CSCve93750, CSCve93762, CSCve93763, CSCvg04127.

Exploitation status

No public exploit

No exploit has been reported in the sources we check. Published 8 years ago.
  • CISA KEV not listed
  • VulnCheck KEV not listed
  • CISA Vulnrichment no assessment published
  • Indexed PoC none indexed
  • EPSS 0.43% chance in 30 days

Waratek protection

Outside Waratek scope

A Java vulnerability, but not one Waratek protects. It affects only Java on a user's desktop (applets, Web Start, JavaFX, the installer), sits in a product the Waratek agent can't be installed into, or is in a package we don't expect in business applications. The decision below says which.

  • Protection none
  • Action not pursued none
  • Review human Researcher
  • Record active
Decided by Manual classification of this CVE in the legacy dataset
Finding A manual classification set this CVE's status to Outside Waratek scope, but the CVE names a tracked product.

CVSS

4.2 MEDIUM v3.0 CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L 2 metrics

We show the highest score from the newest CVSS version. Scores from different versions can't be compared, and the first score listed is sometimes a 0.0 placeholder.

VersionScoreBandVectorAssignerType
CVSS 3.0 4.2 MEDIUM CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L NVD Primary published
CVSS 2.0 4.6 none AV:L/AC:L/Au:N/C:P/I:P/A:P NVD Primary

Affected software and releases

Products and versions

2 products, 7 version entries
SourceVendorProductSchemeAffected versions
nvd cisco nx-os generic 6.0\(2\)a8\(3\) · 8.0\(1\) · 8.1\(0\)bd\(0.20\) · 8.1\(0.2\)s0 · 8.1\(0.59\)s0 · 8.1\(1\)s5
nvd cisco unified computing system generic 7.0\(0\)hsk\(0.357\)

References

URLTags
http://www.securityfocus.com/bid/102168
http://www.securitytracker.com/id/1039936 Third Party Advisory, VDB Entry
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20171129-nxos5 Vendor Advisory

Timeline
Published2017-11-30By the CVE Program.
NVD record modified2026-06-17NVD's own last-modified date for this record.