CVE-2021-20796 Path traversal in Cybozu Remote Service
A remote authenticated attacker can upload arbitrary files via directory traversal in Cybozu Remote Service, potentially leading to code execution.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-20796?
CVE-2021-20796 is a medium-severity path traversal vulnerability in Cybozu, Inc. Cybozu Remote Service, published on 13 Oct 2021. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Directory traversal vulnerability in the management screen of Cybozu Remote Service 3.1.8 allows a remote authenticated attacker to upload an arbitrary file via unspecified vectors.
Weakness: CWE-22
Which versions are affected by CVE-2021-20796?
It affects 1 product.
Products include Cybozu Remote Service Manager.
How do I fix CVE-2021-20796?
No fix has been published for CVE-2021-20796 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-2021-20796 being exploited?
There is no known exploitation of CVE-2021-20796 in the wild and no public exploit code.
Other vulnerabilities in Cybozu, Inc. Cybozu Remote Service
Sources
Also known as GHSA-hj57-6wxm-559x.