Vulnerability in Westerndigital My Cloud
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.
EPSS: 0.031 (86.2th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Westerndigital My_cloud
- Westerndigital My_cloud_dl2100
- Westerndigital My_cloud_dl2100_firmware
- Westerndigital My_cloud_dl4100
- Westerndigital My_cloud_dl4100_firmware
- Westerndigital My_cloud_ex2100
- Westerndigital My_cloud_ex2100_firmware
- Westerndigital My_cloud_ex2_ultra
- Westerndigital My_cloud_ex2_ultra_firmware
- Westerndigital My_cloud_ex4100
Weakness classification (CWE)
Public proof-of-concept exploits
References
- cve@mitre.org (x_refsource_CONFIRM, Vendor Advisory)
- cve@mitre.org (Exploit, Third Party Advisory, x_refsource_MISC)
- cve@mitre.org (Exploit, Third Party Advisory, x_refsource_MISC)
Frequently asked questions
- What is CVE-2019-9949?
- CVE-2019-9949 is a high-severity vulnerability in Westerndigital My Cloud, classified under Improper Link Resolution Before File Access. CVSS score: 8.8/10. Published 2019-05-23.
- How severe is CVE-2019-9949?
- High severity. CVSS v3 base score is 8.8 out of 10.
- Is CVE-2019-9949 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.