CVE-2021-32794 Accidental removal of IPCPassword (< 5.1.2.4)

Q: What is CVE-2021-32794?

CVE-2021-32794 is a medium-severity authentication bypass vulnerability in JustArchiNET ArchiSteamFarm, published on 26 Jul 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.

Q: Is CVE-2021-32794 being exploited?

There is no known exploitation of CVE-2021-32794 in the wild and no public exploit code.

Q: How do I fix CVE-2021-32794?

No fix has been published for CVE-2021-32794 yet. Limit exposure of the affected software until one is available.

Medium 6.8 Published 26 Jul 2021 Updated 3 Aug 2024

A bug in ArchiSteamFarm could accidentally remove the IPC password, allowing unauthorized access to the IPC interface if not manually verified.

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

What is CVE-2021-32794?

CVE-2021-32794 is a medium-severity authentication bypass vulnerability in JustArchiNET ArchiSteamFarm, published on 26 Jul 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

ArchiSteamFarm is a C# application with primary purpose of idling Steam cards from multiple accounts simultaneously. Due to a bug in ASF code `POST /Api/ASF` ASF API endpoint responsible for updating global ASF config incorrectly removed `IPCPassword` from the resulting config when the caller did not specify it explicitly. Due to the above, it was possible for the user to accidentally remove `IPCPassword` security measure from his IPC interface when updating global ASF config, which exists as part of global config update functionality in ASF-ui. Removal of `IPCPassword` possesses a security risk, as unauthorized users may in result access the IPC interface after such modification. The issue is patched in ASF V5.1.2.4 and future versions. We recommend to manually verify that `IPCPassword` is specified after update, and if not, set it accordingly. In default settings, ASF is configured to allow IPC access from `localhost` only and should not affect majority of users.

Weakness: CWE-306, CWE-287

Which versions are affected by CVE-2021-32794?

It affects 1 product.

Products include Archisteamfarm Project Archisteamfarm.

How do I fix CVE-2021-32794?

No fix has been published for CVE-2021-32794 yet. Limit exposure of the affected software until one is available.

Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.

Is CVE-2021-32794 being exploited?

There is no known exploitation of CVE-2021-32794 in the wild and no public exploit code.

Sources

Also known as GHSA-wxx4-66c2-vj2v.