CVE-2021-29088 Path traversal in Synology DiskStation Manager (DSM)

High 7.8 Published 1 Jun 2021 Updated 16 Sep 2024

Local attackers can exploit a path traversal flaw in the CGI component to execute arbitrary code on Synology NAS devices.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Local or same network only
Victim action needed: Not needed
Fix: None listed

What is CVE-2021-29088?

CVE-2021-29088 is a high-severity path traversal vulnerability in Synology Diskstation Manager, published on 1 Jun 2021. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

Improper limitation of a pathname to a restricted directory ('Path Traversal') in cgi component in Synology DiskStation Manager (DSM) before 6.2.4-25553 allows local users to execute arbitrary code via unspecified vectors.

Weakness: CWE-22

Which versions are affected by CVE-2021-29088?

It affects 1 product.

Products include Synology Diskstation Manager.

How do I fix CVE-2021-29088?

No fix has been published for CVE-2021-29088 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-2021-29088 being exploited?

There is no known exploitation of CVE-2021-29088 in the wild and no public exploit code.

All Synology Diskstation Manager vulnerabilities

Sources

Also known as GHSA-88jq-fmhx-7gr3.