CVE-2022-36327: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') vulnerability that could allow an attacker to write files to locations with certain critical filesystem types leading ...

Summary

Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') vulnerability that could allow an attacker to write files to locations with certain critical filesystem types leading to remote code execution was discovered in Western Digital My Cloud Home, My Cloud Home Duo, SanDisk ib...

What to do

Update westerndigital my_cloud_os_5 to version 5.26.202 or later.
Update westerndigital my_cloud_home_firmware to version 9.4.0-191 or later.
Update westerndigital sandisk_ibi_firmware to version 9.4.0-191 or later.
Update westerndigital my_cloud_home_duo_firmware to version 9.4.0-191 or later.

Affected software

Vendor	Product	Affected versions
westerndigital	my_cloud_os_5	< 5.26.202 `cpe:2.3:o:westerndigital:my_cloud_os_5::::::::`
westerndigital	my_cloud_home_firmware	< 9.4.0-191 `cpe:2.3:o:westerndigital:my_cloud_home_firmware::::::::`
westerndigital	sandisk_ibi_firmware	< 9.4.0-191 `cpe:2.3:o:westerndigital:sandisk_ibi_firmware::::::::`
westerndigital	my_cloud_home_duo_firmware	< 9.4.0-191 `cpe:2.3:o:westerndigital:my_cloud_home_duo_firmware::::::::`

Original advisory text

Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') vulnerability that could allow an attacker to write files to locations with certain critical filesystem types leading ...

Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') vulnerability that could allow an attacker to write files to locations with certain critical filesystem types leading to remote code execution was discovered in Western Digital My Cloud Home, My Cloud Home Duo, SanDisk ibi and Western Digital My Cloud OS 5 devices. This issue requires an authentication bypass issue to be triggered before this can be exploited.
This issue affects My Cloud Home and My Cloud Home Duo: before 9.4.0-191; ibi: before 9.4.0-191; My Cloud OS 5: before 5.26.202.

References

https://www.westerndigital.com/support/product-security/wdc-23003-western-digita... Release Notes Vendor Advisory
https://www.westerndigital.com/support/product-security/wdc-23006-my-cloud-firmw... Release Notes Vendor Advisory