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 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.

CVSS v3.0

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

CVSS v2.0

9.0 HIGHAV:N/AC:L/Au:S/C:C/I:C/A:C

EPSS

3.05% chance of exploitation in the next 30 days, 87th percentile

Published

2019-05-23

Updated

2024-08-04

Proof-of-concept exploits (2)

• https://bnbdr.github.io/posts/wd/
• bnbdr/wd-rce/

References

• CVE Record
• NVD entry

Related

• CVE-2018-12034
• CVE-2018-12035
• CVE-2018-19974
• CVE-2018-19975
• CVE-2018-19976
• CVE-2019-9948