CVE-2017-12336
Summary
| CVE | CVE-2017-12336 |
|---|---|
| State | PUBLISHED |
| Assigner | cisco |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2017-11-30 09:29:00 UTC |
| Updated | 2025-04-20 01:37:25 UTC |
| 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. |
Risk And Classification
Primary CVSS: v3.0 4.2 MEDIUM from [email protected]
CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L
EPSS: 0.001040000 probability, percentile 0.278730000 (date 2026-05-14)
Problem Types: CWE-20 | CWE-20 CWE-20
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.0 | [email protected] | Primary | 4.2 | MEDIUM | CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L |
| 2.0 | [email protected] | Primary | 4.6 | AV:L/AC:L/Au:N/C:P/I:P/A:P |
CVSS v3.0 Breakdown
Attack Vector
LocalAttack Complexity
LowPrivileges Required
HighUser Interaction
NoneScope
UnchangedConfidentiality
LowIntegrity
LowAvailability
LowCVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L
CVSS v2.0 Breakdown
Access Vector
LocalAccess Complexity
LowAuthentication
NoneConfidentiality
PartialIntegrity
PartialAvailability
PartialAV:L/AC:L/Au:N/C:P/I:P/A:P
NVD Known Affected Configurations (CPE 2.3)
| Type | Vendor | Product | Version | Update | Edition | Language |
|---|---|---|---|---|---|---|
| Operating System | Cisco | Nx-os | 6.0\(2\)a8\(3\) | All | All | All |
| Operating System | Cisco | Nx-os | 8.0\(1\) | All | All | All |
| Operating System | Cisco | Nx-os | 8.1\(0.2\)s0 | All | All | All |
| Operating System | Cisco | Nx-os | 8.1\(0.59\)s0 | All | All | All |
| Operating System | Cisco | Nx-os | 8.1\(0\)bd\(0.20\) | All | All | All |
| Operating System | Cisco | Nx-os | 8.1\(1\)s5 | All | All | All |
| Application | Cisco | Unified Computing System | 7.0\(0\)hsk\(0.357\) | All | All | All |
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Na | Cisco NX-OS | affected Cisco NX-OS | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| Cisco NX-OS System Software Interactive TCL Shell Escape Vulnerability | af854a3a-2127-422b-91ae-364da2661108 | tools.cisco.com | Vendor Advisory |
| Cisco NX-OS System Software CVE-2017-12336 Local Unauthorized Access Vulnerability | af854a3a-2127-422b-91ae-364da2661108 | www.securityfocus.com | |
| Cisco NX-OS TCL Sandbox Escape Flaw Lets Local Users Gain Elevated Privileges - SecurityTracker | af854a3a-2127-422b-91ae-364da2661108 | www.securitytracker.com | Third Party Advisory, VDB Entry |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.