CVE-2019-9949: Western Digital My Cloud Cloud, Mirror Gen2, EX2 Ultra, EX2100, EX4100, DL2100, DL4100, PR2100 and PR4100 before firmware 2.31.183 are affected by a code…

PriorityP357high8.8CVSS 3.0

AVNACLPRLUINSUCHIHAH

EPSS

3.05%

85.9th percentile

Western Digital My Cloud Cloud, Mirror Gen2, EX2 Ultra, EX2100, EX4100, DL2100, DL4100, PR2100 and PR4100 before firmware 2.31.183 are affected by a code execution (as root, starting from a low-privilege user session) vulnerability. The cgi-bin/webfile_mgr.cgi file allows arbitrary file write by abusing symlinks. Specifically, this occurs by uploading a tar archive that contains a symbolic link, then uploading another archive that writes a file to the link using the "cgi_untar" command. Other commands might also be susceptible. Code can be executed because the "name" parameter passed to the cgi_unzip command is not sanitized.

Affected

9 ranges

Vendor	Product	Version range	Fixed in
westerndigital	my_cloud_dl2100_firmware	< 2.31.183	2.31.183
westerndigital	my_cloud_dl4100_firmware	< 2.31.183	2.31.183
westerndigital	my_cloud_ex2100_firmware	< 2.31.183	2.31.183
westerndigital	my_cloud_ex2_ultra_firmware	< 2.31.183	2.31.183
westerndigital	my_cloud_ex4100_firmware	< 2.31.183	2.31.183
westerndigital	my_cloud_firmware	< 2.31.183	2.31.183
westerndigital	my_cloud_mirror_gen2_firmware	< 2.31.183	2.31.183
westerndigital	my_cloud_pr2100_firmware	< 2.31.183	2.31.183
westerndigital	my_cloud_pr4100_firmware	< 2.31.183	2.31.183

CVSS provenance

nvdv3.08.8HIGHCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

nvdv2.09.0CRITICALAV:N/AC:L/Au:S/C:C/I:C/A:C

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