CVE-2021-33182 Path traversal in Synology DiskStation Manager (DSM)

What is CVE-2021-33182?

CVE-2021-33182 is a medium-severity path traversal vulnerability in Synology Diskstation Manager, published on 1 Jun 2021. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

Improper limitation of a pathname to a restricted directory ('Path Traversal') vulnerability in PDF Viewer component in Synology DiskStation Manager (DSM) before 6.2.4-25553 allows remote authenticated users to read limited files via unspecified vectors.

Weakness: CWE-22

Which versions are affected by CVE-2021-33182?

It affects 1 product.

Products include Synology Diskstation Manager.

How do I fix CVE-2021-33182?

No fix has been published for CVE-2021-33182 yet. Limit exposure of the affected software until one is available.

Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.

Is CVE-2021-33182 being exploited?

There is no known exploitation of CVE-2021-33182 in the wild and no public exploit code.

Other vulnerabilities in Synology Diskstation Manager

• CVE-2022-27624 Memory corruption in DiskStation Manager (DSM) Critical 10.0
• CVE-2022-27625 Memory corruption in DiskStation Manager (DSM) Critical 10.0
• CVE-2022-27626 Race condition in DiskStation Manager (DSM) Critical 10.0
• CVE-2013-6955 Path traversal in n/a Critical 10.0
• CVE-2022-22687 Memory corruption in DiskStation Manager (DSM) Critical 9.8

All Synology Diskstation Manager vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-r945-qf65-4pr8.