CVE Vulnerability

CVE-2019-9949

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.

9 /10

CVSS v2.0 :

V3 Legend

Vector :

Exploitability : 8 / Impact : 10

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Confidentiality Impact COMPLETE

Integrity Impact COMPLETE

Availability Impact COMPLETE

Scope

8.8 /10

CVSS v3.0 : HIGH

V3 Legend

Vector :

Exploitability : 2.8 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://community.wd.com/t/new-release-my-cloud-firmware-versions-2-31-183-05-20-2019/237717 Vendor Advisory
https://github.com/bnbdr/wd-rce/ Exploit Third Party Advisory
https://bnbdr.github.io/posts/wd/ Exploit Third Party Advisory
Configurations

Configuration 1
Information

Published : 2019-05-23 02:29

Updated : 2019-05-29 01:08

NVD link : CVE-2019-9949

Mitre link : CVE-2019-9949

Products Affected

My Cloud Pr4100 Firmware

Westerndigital

CWE
CWE-59