ArchiSteamFarm (ASF) is a C# application with primary purpose of idling Steam cards from multiple accounts simultaneously. Due to a bug in ASF code, introduced in version V5.2.2.2, the program didnt adequately verify effective access of the user sending proxy (i.e. [Bots]) commands. In particular, a proxy-like command sent to bot A targeting bot B has incorrectly verified users access against bot A - instead of bot B, to which the command was originally designated. This in result allowed access to resources beyond those configured, being a security threat affecting confidentiality of other bot instances. A successful attack exploiting this bug requires a significant access granted explicitly by original owner of the ASF process prior to that, as attacker has to control at least a single bot in the process to make use of this inadequate access verification loophole. The issue is patched in ASF V5.2.2.5, V5.2.3.2 and future versions. Users are advised to update as soon as possible.
The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check. This allows attackers to bypass intended access restrictions.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Archisteamfarm | Archisteamfarm_project | 5.2.2.2 (including) | 5.2.2.5 (excluding) |
| Archisteamfarm | Archisteamfarm_project | 5.2.3.0 (including) | 5.2.3.2 (excluding) |
Assuming a user with a given identity, authorization is the process of determining whether that user can access a given resource, based on the user’s privileges and any permissions or other access-control specifications that apply to the resource. When access control checks are incorrectly applied, users are able to access data or perform actions that they should not be allowed to perform. This can lead to a wide range of problems, including information exposures, denial of service, and arbitrary code execution.