CVE-2021-26556 Privilege escalation in Octopus Server
An unprivileged user can gain privileged access via DLL side-loading when Octopus Server is installed in a custom folder with incorrect ACLs.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2021-26556?
CVE-2021-26556 is a high-severity vulnerability in Octopus Octopus Server, published on 7 Oct 2021. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
When Octopus Server is installed using a custom folder location, folder ACLs are not set correctly and could lead to an unprivileged user using DLL side-loading to gain privileged access.
Weakness: CWE-426
Which versions are affected by CVE-2021-26556?
It affects 2 products.
Products include Octopus Octopus Deploy, Octopus Octopus Server.
How do I fix CVE-2021-26556?
No fix has been published for CVE-2021-26556 yet. Limit exposure of the affected software until one is available.
Is CVE-2021-26556 being exploited?
There is no known exploitation of CVE-2021-26556 in the wild and no public exploit code.
Other vulnerabilities in Octopus Octopus Server
Sources
Also known as GHSA-cpf5-2wrr-hcvc.