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.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (3.05%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
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 3.0
- 8.8 HIGHCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 3.05% probability · 87th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-59
- Affected
- westerndigital/my cloud firmware · westerndigital/my cloud mirror gen2 firmware · westerndigital/my cloud ex2 ultra firmware · westerndigital/my cloud ex2100 firmware · westerndigital/my cloud ex4100 firmware · westerndigital/my cloud dl2100 firmware · westerndigital/my cloud dl4100 firmware · westerndigital/my cloud pr2100 firmware · westerndigital/my cloud pr4100 firmware
- Source
- cve@mitre.org
References
- https://bnbdr.github.io/posts/wd/Exploit, Third Party Advisory
- https://community.wd.com/t/new-release-my-cloud-firmware-versions-2-31-183-05-20-2019/237717Vendor Advisory
- https://github.com/bnbdr/wd-rce/Exploit, Third Party Advisory
- https://bnbdr.github.io/posts/wd/Exploit, Third Party Advisory
- https://community.wd.com/t/new-release-my-cloud-firmware-versions-2-31-183-05-20-2019/237717Vendor Advisory
- https://github.com/bnbdr/wd-rce/Exploit, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.