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Vulnerability CVE-2019-9949
Published: 2019-05-23
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. |
Type:
CWE-59 (Improper Link Resolution Before File Access ('Link Following'))
CVSS2 => (AV:N/AC:L/Au:S/C:C/I:C/A:C)
CVSS Base Score |
Impact Subscore |
Exploitability Subscore |
9/10 |
10/10 |
8/10 |
Exploit range |
Attack complexity |
Authentication |
Remote |
Low |
Single time |
Confidentiality impact |
Integrity impact |
Availability impact |
Complete |
Complete |
Complete |
References: |
https://bnbdr.github.io/posts/wd/
https://community.wd.com/t/new-release-my-cloud-firmware-versions-2-31-183-05-20-2019/237717
https://github.com/bnbdr/wd-rce/
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