Improper input validation in Cisco Systems, Inc products - CVE-2017-12340
Published: November 29, 2017 / Updated: December 1, 2017
Vulnerability identifier: #VU9516
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2017-12340
CWE-ID: CWE-20
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Cisco Systems, Inc
Affected software:
Multilayer Director Switches
Nexus 7700 Series Switches
Nexus 7000 Series Switches
Multilayer Director Switches
Nexus 7700 Series Switches
Nexus 7000 Series Switches
Detailed vulnerability description
The vulnerability allows a local attacker to bypass security restrictions on the target system.
The vulnerability exists due to insufficient sanitization of user-supplied parameters that are passed to certain functions of the Python scripting sandbox. A local attacker can escape the scripting sandbox and enter the Bash shell of the operating system with the privileges of the authenticated user.
How to mitigate CVE-2017-12340
Install update from vendor's website.