CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:N/AC:L/Au:N/C:C/I:C/A:C
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
AI Score
Confidence
High
EPSS
Percentile
97.5%
It was discovered that the Western Digital My Cloud device before 2.30.196 is affected by an authentication bypass vulnerability. An unauthenticated attacker can exploit this vulnerability to authenticate as an admin user without needing to provide a password, thereby gaining full control of the device. (Whenever an admin logs into My Cloud, a server-side session is created that is bound to the user’s IP address. After the session is created, it is possible to call authenticated CGI modules by sending the cookie username=admin in the HTTP request. The invoked CGI will check if a valid session is present and bound to the user’s IP address.) It was found that it is possible for an unauthenticated attacker to create a valid session without a login. The network_mgr.cgi CGI module contains a command called “cgi_get_ipv6” that starts an admin session – tied to the IP address of the user making the request – if the additional parameter “flag” with the value “1” is provided. Subsequent invocation of commands that would normally require admin privileges now succeed if an attacker sets the username=admin cookie.
Vendor | Product | Version | CPE |
---|---|---|---|
western_digital | my_cloud_wdbctl0020hwt_firmware | * | cpe:2.3:o:western_digital:my_cloud_wdbctl0020hwt_firmware:*:*:*:*:*:*:*:* |
western_digital | my_cloud_wdbctl0020hwt | * | cpe:2.3:h:western_digital:my_cloud_wdbctl0020hwt:*:*:*:*:*:*:*:* |
western_digital | my_cloud_pr4100 | * | cpe:2.3:o:western_digital:my_cloud_pr4100:*:*:*:*:*:*:*:* |
western_digital | my_cloud_pr4100 | - | cpe:2.3:h:western_digital:my_cloud_pr4100:-:*:*:*:*:*:*:* |
western_digital | my_cloud_pr2100_firmware | * | cpe:2.3:o:western_digital:my_cloud_pr2100_firmware:*:*:*:*:*:*:*:* |
western_digital | my_cloud_pr2100 | - | cpe:2.3:h:western_digital:my_cloud_pr2100:-:*:*:*:*:*:*:* |
western_digital | my_cloud_mirror_gen_2 | - | cpe:2.3:h:western_digital:my_cloud_mirror_gen_2:-:*:*:*:*:*:*:* |
western_digital | my_cloud_mirror_gen_2_firmware | * | cpe:2.3:o:western_digital:my_cloud_mirror_gen_2_firmware:*:*:*:*:*:*:*:* |
western_digital | my_cloud_mirror | - | cpe:2.3:h:western_digital:my_cloud_mirror:-:*:*:*:*:*:*:* |
western_digital | my_cloud_mirror_firmware | * | cpe:2.3:o:western_digital:my_cloud_mirror_firmware:*:*:*:*:*:*:*:* |
packetstormsecurity.com/files/173802/Western-Digital-MyCloud-Unauthenticated-Command-Injection.html
www.securityfocus.com/bid/105359
securify.nl/nl/advisory/SFY20180102/authentication-bypass-vulnerability-in-western-digital-my-cloud-allows-escalation-to-admin-privileges.html
support.wdc.com/knowledgebase/answer.aspx?ID=25952
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:N/AC:L/Au:N/C:C/I:C/A:C
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
AI Score
Confidence
High
EPSS
Percentile
97.5%