CVE-2019-9949

CVSS V2 High 9 CVSS V3 High 8.8
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.
Overview
  • CVE ID
  • CVE-2019-9949
  • Assigner
  • cve@mitre.org
  • Vulnerability Status
  • Analyzed
  • Published Version
  • 2019-05-23T14:29:08
  • Last Modified Date
  • 2019-05-29T01:08:48
Weakness Enumerations
CWE URL
CWE-59 http://cwe.mitre.org/data/definitions/59.html
CPE Configuration (Product)
CPE Vulnerable Operator Version Start Version End
AND
cpe:2.3:o:westerndigital:my_cloud_firmware:*:*:*:*:*:*:*:* 1 OR 2.31.183
cpe:2.3:h:westerndigital:my_cloud:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:westerndigital:my_cloud_mirror_gen2_firmware:*:*:*:*:*:*:*:* 1 OR 2.31.183
cpe:2.3:h:westerndigital:my_cloud_mirror_gen2:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:westerndigital:my_cloud_ex2_ultra_firmware:*:*:*:*:*:*:*:* 1 OR 2.31.183
cpe:2.3:h:westerndigital:my_cloud_ex2_ultra:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:westerndigital:my_cloud_ex2100_firmware:*:*:*:*:*:*:*:* 1 OR 2.31.183
cpe:2.3:h:westerndigital:my_cloud_ex2100:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:westerndigital:my_cloud_ex4100_firmware:*:*:*:*:*:*:*:* 1 OR 2.31.183
cpe:2.3:h:westerndigital:my_cloud_ex4100:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:westerndigital:my_cloud_dl2100_firmware:*:*:*:*:*:*:*:* 1 OR 2.31.183
cpe:2.3:h:westerndigital:my_cloud_dl2100:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:westerndigital:my_cloud_dl4100_firmware:*:*:*:*:*:*:*:* 1 OR 2.31.183
cpe:2.3:h:westerndigital:my_cloud_dl4100:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:westerndigital:my_cloud_pr2100_firmware:*:*:*:*:*:*:*:* 1 OR 2.31.183
cpe:2.3:h:westerndigital:my_cloud_pr2100:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:westerndigital:my_cloud_pr4100_firmware:*:*:*:*:*:*:*:* 1 OR 2.31.183
cpe:2.3:h:westerndigital:my_cloud_pr4100:-:*:*:*:*:*:*:* 0 OR
CVSS Version 2
  • Version
  • 2.0
  • Vector String
  • AV:N/AC:L/Au:S/C:C/I:C/A:C
  • Access Vector
  • NETWORK
  • Access Compatibility
  • LOW
  • Authentication
  • SINGLE
  • Confidentiality Impact
  • COMPLETE
  • Integrity Impact
  • COMPLETE
  • Availability Impact
  • COMPLETE
  • Base Score
  • 9
  • Severity
  • HIGH
  • Exploitability Score
  • 8
  • Impact Score
  • 10
CVSS Version 3
  • Version
  • 3.0
  • Vector String
  • CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
  • Attack Vector
  • NETWORK
  • Attack Compatibility
  • LOW
  • Privileges Required
  • LOW
  • User Interaction
  • NONE
  • Scope
  • UNCHANGED
  • Confidentiality Impact
  • HIGH
  • Availability Impact
  • HIGH
  • Base Score
  • 8.8
  • Base Severity
  • HIGH
  • Exploitability Score
  • 2.8
  • Impact Score
  • 5.9
References
Reference URL Reference Tags
https://community.wd.com/t/new-release-my-cloud-firmware-versions-2-31-183-05-20-2019/237717 Vendor Advisory
https://github.com/bnbdr/wd-rce/ Exploit Third Party Advisory
https://bnbdr.github.io/posts/wd/ Exploit Third Party Advisory
Sources
Source Name Source URL
NIST https://nvd.nist.gov/vuln/detail/CVE-2019-9949
MITRE https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-9949
History
Created Old Value New Value Data Type Notes
2022-05-10 07:51:24 Added to TrackCVE
2022-12-03 21:09:06 2019-05-23T14:29Z 2019-05-23T14:29:08 CVE Published Date updated
2022-12-03 21:09:06 2019-05-29T01:08:48 CVE Modified Date updated
2022-12-03 21:09:06 Analyzed Vulnerability Status updated