CVE-2021-3310

Western Digital My Cloud OS 5 devices before 5.10.122 mishandle Symbolic Link Following on SMB and AFP shares. This can lead to code execution and information disclosure (by reading local files).

CVSS v3 7.8 HIGH
CVSS v2.0 4.6 MEDIUM

7.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

4.6^/10

CVSS v2.0 : MEDIUM

Vector : AV:L/AC:L/Au:N/C:P/I:P/A:P

Exploitability : 3.9 / Impact : 6.4

Access Vector LOCAL

Access Complexity LOW

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact PARTIAL

References

Link	Resource
https://www.westerndigital.com/support/productsecurity/wdc-21002-my-cloud-firmware-version-5-10-122	Vendor Advisory
https://www.zerodayinitiative.com/advisories/ZDI-21-277/	Third Party Advisory

Configurations

Configuration 1 (hide)

AND

OR	cpe:2.3:h:westerndigital:my_cloud_dl2100:-:::::::*
	cpe:2.3:h:westerndigital:my_cloud_dl4100:-:::::::*
	cpe:2.3:h:westerndigital:my_cloud_ex2_ultra:-:::::::*
	cpe:2.3:h:westerndigital:my_cloud_ex2100:-:::::::*
	cpe:2.3:h:westerndigital:my_cloud_ex4100:-:::::::*
	cpe:2.3:h:westerndigital:my_cloud_mirror_gen_2:-:::::::*
	cpe:2.3:h:westerndigital:my_cloud_pr2100:-:::::::*
	cpe:2.3:h:westerndigital:my_cloud_pr4100:-:::::::*

cpe:2.3:o:westerndigital:my_cloud_os:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2021-03-10 05:15

Updated : 2021-03-17 17:42

NVD link : CVE-2021-3310

Mitre link : CVE-2021-3310

CVE.ORG link : CVE-2021-3310

JSON object : View

Products Affected

westerndigital

my_cloud_ex2_ultra
my_cloud_pr4100
my_cloud_dl2100
my_cloud_mirror_gen_2
my_cloud_ex2100
my_cloud_dl4100
my_cloud_pr2100
my_cloud_ex4100
my_cloud_os

CWE

CWE-59

Improper Link Resolution Before File Access ('Link Following')

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