Vulnerability identifier: #VU9871
Vulnerability risk: Critical
CVSSv3.1: 9.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:H/RL:O/RC:C]
CVE-ID:
CWE-ID:
CWE-912
Exploitation vector: Network
Exploit availability: No
Vulnerable software:
WD My Cloud
Hardware solutions /
Office equipment, IP-phones, print servers
Vendor: Western Digital
Description
The vulnerability allows a remote attacker to gain unauthorized access to vulnerable device.
The vulnerability exists due to presence of a backdoor code (hard-coded account credentials) in firmware shared by WD My Cloud and D-LINK DNS-320L ShareCenter software. A remote attacker can send a specially crafted HTTP GET request to the affected device and gain unauthorized access to it.
Exploitation example:
GET /cgi-bin/nas_sharing.cgi?dbg=1&cmd=51&user=mydlinkBRionyg&passwd=YWJjMTIzNDVjYmE&start=1&count=1;touch+/tmp/gulftech; HTTP/1.1
Mitigation
Update to version 2.30.172.
Vulnerable software versions
WD My Cloud: 2.10.302 - 2.30.165
External links
http://support.wdc.com/download/notes/WD_My_Cloud_Firmware_Release_Notes_2.30.172.pdf?v=987
http://gulftech.org/advisories/WDMyCloud%20Multiple%20Vulnerabilities/125
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
Yes. This vulnerability is being exploited in the wild.