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

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).

Published 2021-03-10 05:15:14

Updated 2021-03-17 17:42:36

Source MITRE

View at NVD, CVE.org

Vulnerability category: Information leak

Products affected by CVE-2021-3310

Westerndigital » My Cloud Os
Versions before (<) 5.10.122
cpe:2.3:o:westerndigital:my_cloud_os:*:*:*:*:*:*:*:*
Matching versions
When used together with: Westerndigital » My Cloud Dl2100 » Version: N/A
When used together with: Westerndigital » My Cloud Dl4100 » Version: N/A
When used together with: Westerndigital » My Cloud Ex2 Ultra » Version: N/A
When used together with: Westerndigital » My Cloud Ex2100 » Version: N/A
When used together with: Westerndigital » My Cloud Ex4100 » Version: N/A
When used together with: Westerndigital » My Cloud Mirror Gen 2 » Version: N/A
When used together with: Westerndigital » My Cloud Pr2100 » Version: N/A
When used together with: Westerndigital » My Cloud Pr4100 » Version: N/A

Exploit prediction scoring system (EPSS) score for CVE-2021-3310

EPSS FAQ

0.05%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 13 %

Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2021-3310

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
4.6	MEDIUM	AV:L/AC:L/Au:N/C:P/I:P/A:P	3.9	6.4	NIST
Access Vector: Local Access Complexity: Low Authentication: None Confidentiality Impact: Partial Integrity Impact: Partial Availability Impact: Partial
7.8	HIGH	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	1.8	5.9	NIST
Attack Vector: Local Attack Complexity: Low Privileges Required: Low User Interaction: None Scope: Unchanged Confidentiality: High Integrity: High Availability: High

CWE ids for CVE-2021-3310

CWE-59 Improper Link Resolution Before File Access ('Link Following')

The product attempts to access a file based on the filename, but it does not properly prevent that filename from identifying a link or shortcut that resolves to an unintended resource.

Assigned by: nvd@nist.gov (Primary)

References for CVE-2021-3310

https://www.westerndigital.com/support/productsecurity/wdc-21002-my-cloud-firmware-version-5-10-122

WDC-21002 My Cloud Firmware Version 5.10.122 | Western Digital
Vendor Advisory
https://www.zerodayinitiative.com/advisories/ZDI-21-277/

ZDI-21-277 | Zero Day Initiative
Third Party Advisory

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Vulnerability Details : CVE-2021-3310

Products affected by CVE-2021-3310

Exploit prediction scoring system (EPSS) score for CVE-2021-3310

CVSS scores for CVE-2021-3310

CWE ids for CVE-2021-3310

References for CVE-2021-3310