CWE Code: 59
Vulnerability Type: privilege_escalation
CVSS Score: 9.0
CWE Name:  Improper Link Resolution Before File Access ('Link Following')
Summary: western digital my cloud cloud, mirror gen2, ex2 ultra, ex2100, ex4100, dl2100, dl4100, pr2100 and pr4100 before firmware 2.31.183 are affected by a code execution (as root, starting from a low-privilege user session) vulnerability. the cgi-bin/webfile_mgr.cgi file allows arbitrary file write by abusing symlinks. specifically, this occurs by uploading a tar archive that contains a symbolic link, then uploading another archive that writes a file to the link using the "cgi_untar" command. other commands might also be susceptible. code can be executed because the "name" parameter passed to the cgi_unzip command is not sanitized.
Access Authentication: SINGLE
Access Complexity: LOW
Access Vector: NETWORK
Impact (C/I/A): COMPLETE/COMPLETE/COMPLETE
Published Date: 2019-05-23
Last Modified Date: 2019-05-29