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CVE-2019-9949

8.8 · HIGH

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-pri…

Published May 23, 2019CWE-59EPSS 3.00%

Overview

CVE-2019-9949 is a high-severity vulnerability. It was published on May 23, 2019 and has a CVSS 3.0 base score of 8.8 (HIGH).

This vulnerability has a CVSS 3.0 base score of 8.8, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refbnbdr.github.io/posts/wd/Refcommunity.wd.com/t/new-release-my-cloud-firmware-versions-2-31-183-05-20-2019/237717GitHubgithub.com/bnbdr/wd-rce/Refbnbdr.github.io/posts/wd/Refcommunity.wd.com/t/new-release-my-cloud-firmware-versions-2-31-183-05-20-2019/237717GitHubgithub.com/bnbdr/wd-rce/

How CyberStrike helps

Frequently asked questions

What is CVE-2019-9949?

CVE-2019-9949 is a high-severity vulnerability. It was published on May 23, 2019 and has a CVSS 3.0 base score of 8.8 (HIGH).

How severe is CVE-2019-9949?

This vulnerability has a CVSS 3.0 base score of 8.8, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2019-9949?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2019-9949?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2019-9949 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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