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CVE-2019-9949

N/A
Published: May 23, 2019 at 01:22 PM UTC
Updated: June 17, 2026 at 02:44 AM UTC
18 products affected across 1 vendorMy Cloud EX2 Ultra FirmwareMy Cloud FirmwareMy Cloud EX2100 Firmware

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Severity
N/A
Exploit prediction
EPSS 3%

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

My Cloud DL2100 Firmware· Westerndigital
95%
v < 2.31.183
Affected range stops below 2.31.183, so it looks safe — our inference, not a vendor statement
My Cloud DL4100 Firmware· Westerndigital
95%
v < 2.31.183
Affected range stops below 2.31.183, so it looks safe — our inference, not a vendor statement
My Cloud EX2 Ultra Firmware· Westerndigital
95%
v < 2.31.183
Affected range stops below 2.31.183, so it looks safe — our inference, not a vendor statement
My Cloud EX2100 Firmware· Westerndigital
95%
v < 2.31.183
Affected range stops below 2.31.183, so it looks safe — our inference, not a vendor statement
My Cloud EX4100 Firmware· Westerndigital
95%
v < 2.31.183
Affected range stops below 2.31.183, so it looks safe — our inference, not a vendor statement
My Cloud Firmware· Westerndigital
95%
v < 2.31.183
Affected range stops below 2.31.183, so it looks safe — our inference, not a vendor statement
My Cloud Mirror Gen 2 Firmware· Westerndigital
95%
v < 2.31.183
Affected range stops below 2.31.183, so it looks safe — our inference, not a vendor statement
westerndigital-my-cloud-mirror-gen2 (same device)
My Cloud PR2100 Firmware· Westerndigital
95%
v < 2.31.183
Affected range stops below 2.31.183, so it looks safe — our inference, not a vendor statement
My Cloud PR4100 Firmware· Westerndigital
95%
v < 2.31.183
Affected range stops below 2.31.183, so it looks safe — our inference, not a vendor statement
My Cloud· Westerndigital
90%
v < 2.31.183
Affected range stops below 2.31.183, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (3)

x_refsource_MISCExploitThird Party Advisory
Source: [email protected]
https://bnbdr.github.io/posts/wd/
x_refsource_CONFIRMVendor Advisory
Source: [email protected]
https://community.wd.com/t/new-release-my-cloud-firmware-versions-2-31-183-05-20-2019/237717
x_refsource_MISCExploitThird Party Advisory
Source: [email protected]
https://github.com/bnbdr/wd-rce/

CVSS

9HIGH[email protected]
Confidentiality
COMPLETE
Integrity
COMPLETE
Availability
COMPLETE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-59

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