Vulnerability Details 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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.026
EPSS Ranking 84.9%
CVSS Severity
CVSS v3 Score 8.8
CVSS v2 Score 9.0
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/
- 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/
Products affected by CVE-2019-9949
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cpe:2.3:h:westerndigital:my_cloud:-
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cpe:2.3:h:westerndigital:my_cloud_dl2100:-
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cpe:2.3:h:westerndigital:my_cloud_dl4100:-
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cpe:2.3:h:westerndigital:my_cloud_ex2100:-
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cpe:2.3:h:westerndigital:my_cloud_ex2_ultra:-
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cpe:2.3:h:westerndigital:my_cloud_ex4100:-
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cpe:2.3:h:westerndigital:my_cloud_mirror_gen2:-
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cpe:2.3:h:westerndigital:my_cloud_pr2100:-
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cpe:2.3:h:westerndigital:my_cloud_pr4100:-
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cpe:2.3:o:westerndigital:my_cloud_dl2100_firmware:-
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cpe:2.3:o:westerndigital:my_cloud_dl2100_firmware:2.31.149
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cpe:2.3:o:westerndigital:my_cloud_dl2100_firmware:2.31.163
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cpe:2.3:o:westerndigital:my_cloud_dl2100_firmware:2.31.174
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cpe:2.3:o:westerndigital:my_cloud_dl4100_firmware:-
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cpe:2.3:o:westerndigital:my_cloud_dl4100_firmware:2.31.149
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cpe:2.3:o:westerndigital:my_cloud_dl4100_firmware:2.31.163
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cpe:2.3:o:westerndigital:my_cloud_dl4100_firmware:2.31.174
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cpe:2.3:o:westerndigital:my_cloud_ex2100_firmware:-
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cpe:2.3:o:westerndigital:my_cloud_ex2100_firmware:2.31.149
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cpe:2.3:o:westerndigital:my_cloud_ex2100_firmware:2.31.163
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cpe:2.3:o:westerndigital:my_cloud_ex2100_firmware:2.31.174
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cpe:2.3:o:westerndigital:my_cloud_ex2_ultra_firmware:-
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cpe:2.3:o:westerndigital:my_cloud_ex2_ultra_firmware:2.31.149
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cpe:2.3:o:westerndigital:my_cloud_ex2_ultra_firmware:2.31.163
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cpe:2.3:o:westerndigital:my_cloud_ex2_ultra_firmware:2.31.174
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cpe:2.3:o:westerndigital:my_cloud_ex4100_firmware:-
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cpe:2.3:o:westerndigital:my_cloud_ex4100_firmware:2.31.149
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cpe:2.3:o:westerndigital:my_cloud_ex4100_firmware:2.31.163
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cpe:2.3:o:westerndigital:my_cloud_ex4100_firmware:2.31.174
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cpe:2.3:o:westerndigital:my_cloud_firmware:-
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cpe:2.3:o:westerndigital:my_cloud_firmware:2.31.149
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cpe:2.3:o:westerndigital:my_cloud_firmware:2.31.163
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cpe:2.3:o:westerndigital:my_cloud_firmware:2.31.174
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cpe:2.3:o:westerndigital:my_cloud_mirror_gen2_firmware:2.31.149
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cpe:2.3:o:westerndigital:my_cloud_mirror_gen2_firmware:2.31.163
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cpe:2.3:o:westerndigital:my_cloud_mirror_gen2_firmware:2.31.174
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cpe:2.3:o:westerndigital:my_cloud_pr2100_firmware:-
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cpe:2.3:o:westerndigital:my_cloud_pr2100_firmware:2.31.149
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cpe:2.3:o:westerndigital:my_cloud_pr2100_firmware:2.31.163
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cpe:2.3:o:westerndigital:my_cloud_pr2100_firmware:2.31.174
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cpe:2.3:o:westerndigital:my_cloud_pr4100_firmware:-
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cpe:2.3:o:westerndigital:my_cloud_pr4100_firmware:2.30.172
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cpe:2.3:o:westerndigital:my_cloud_pr4100_firmware:2.31.149
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cpe:2.3:o:westerndigital:my_cloud_pr4100_firmware:2.31.163
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cpe:2.3:o:westerndigital:my_cloud_pr4100_firmware:2.31.174