A vulnerability in the system shell for Cisco Nexus 9000 Series Fabric Switches in Application Centric Infrastructure (ACI) mode could allow an authenticated, local attacker to use symbolic links to overwrite system files. These system files may be sensitive and should not be overwritable by non-root users. The attacker would need valid device credentials. The vulnerability is due to incorrect symbolic link verification of directory paths when they are used in the system shell. An attacker could exploit this vulnerability by authenticating to the device and providing crafted user input to specific symbolic link CLI commands. Successful exploitation could allow the attacker to overwrite system files that should be restricted. This vulnerability has been fixed in software version 14.1(1i).

Published : 2019-05-03 17:29 Updated : 2019-10-09 23:48

CVSS Score More info
Score 6.6 / 10
Vendor Product Version URI
Cisco Nx-os 14.0%283d%29 cpe:/o:cisco:nx-os:14.0%283d%29
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    1. Nx-os (1) Search CVE
      1. 14.0%283d%29


ID Name Description Links
CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') The software uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the software does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. CVE

History of changes

Date Event
2019-05-06 19:33
2019-05-06 08:29
2019-05-03 17:29