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CVE-2017-12338: Cisco NX‑OS switches may let local users read any file
CVE-2017-12338 · published 8 years ago
Summary
Certain Cisco network switches and management software running NX‑OS can be tricked by an authorized user to view files they shouldn't see. This can expose configuration details or other sensitive data on the device or across virtual contexts. Apply Cisco's recommended updates or patches to fix the command validation problem.
What to do
The CVE record does not list a fixed version. Check the vendor's site or the advisory links below - a fix may already be released.
Affected software
| Vendor | Product | Affected versions |
|---|---|---|
| cisco | nx-os |
8.0\(1\) 8.1\(0\)bd\(0.20\) 8.1\(1\) cpe:2.3:o:cisco:nx-os:8.0\(1\):*:*:*:*:*:*:* |
| cisco | unified_computing_system |
7.0\(0\)hsk\(0.357\) cpe:2.3:a:cisco:unified_computing_system:7.0\(0\)hsk\(0.357\):*:*:*:*:*:*:* |
| cisco | lan_switch_software |
12.2\(1.107\) cpe:2.3:o:cisco:lan_switch_software:12.2\(1.107\):*:*:*:*:*:*:* |
Original advisory text
A vulnerability in the CLI of Cisco NX-OS System Software could allow an authenticated, local attacker to read the contents of arbitrary files. The vulnerability is due to insufficient input valida...
A vulnerability in the CLI of Cisco NX-OS System Software could allow an authenticated, local attacker to read the contents of arbitrary files. The vulnerability is due to insufficient input validation for a specific CLI command. An attacker could exploit this vulnerability by issuing a crafted command on the CLI. An exploit could allow the attacker unauthorized access to read arbitrary files on the underlying local file system. On products that support multiple virtual device contexts (VDCs), this vulnerability could allow an attacker to read files from any VDC. 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 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 Fabric Switches in Application Centric Infrastructure (ACI) mode, 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: CSCve51707, CSCve93961, CSCve93964, CSCve93965, CSCve93968, CSCve93974, CSCve93976.
References
- http://www.securitytracker.com/id/1039937 Third Party Advisory VDB Entry
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-2... Vendor Advisory
Internet-facing
60 days
Internal
At next upgrade
- Not known to be exploited
- Needs hands-on effort to exploit (estimated)
- Gives an attacker partial control (estimated)
Type
CWE-20Improper Input Validation
Timeline
Published30 Nov 2017
Updated4 Nov 2026
First seen29 Sep 2026
Sources
CVE-2017-12338 · NVD
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