Vulnerability Description
ArchiSteamFarm is a C# application with primary purpose of idling Steam cards from multiple accounts simultaneously. In versions prior to 4.3.1.0 a Denial of Service (aka DoS) vulnerability which allows attacker to remotely crash running ASF instance through sending a specifically-crafted Steam chat message exists. The user sending the message does not need to be authorized within the bot or ASF process. The attacker needs to know ASF's `CommandPrefix` in advance, but majority of ASF setups run with an unchanged default value. This attack does not allow attacker to gain any potentially-sensitive information, such as logins or passwords, does not allow to execute arbitrary commands and otherwise exploit the crash further. The issue is patched in ASF V4.3.1.0. The only workaround which guarantees complete protection is running all bots with `OnlineStatus` of `0` (Offline). In this setup, ASF is able to ignore even the specifically-crafted message without attempting to interpret it.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Archisteamfarm Project | Archisteamfarm | < 4.3.1.0 |
Related Weaknesses (CWE)
References
- https://github.com/JustArchiNET/ArchiSteamFarm/commit/4cd581ec041912cf199c5512fePatchThird Party Advisory
- https://github.com/JustArchiNET/ArchiSteamFarm/security/advisories/GHSA-5v34-4prExploitThird Party Advisory
- https://steamcommunity.com/groups/archiasf/discussions/1/2935742047969570844/ExploitThird Party Advisory
- https://github.com/JustArchiNET/ArchiSteamFarm/commit/4cd581ec041912cf199c5512fePatchThird Party Advisory
- https://github.com/JustArchiNET/ArchiSteamFarm/security/advisories/GHSA-5v34-4prExploitThird Party Advisory
- https://steamcommunity.com/groups/archiasf/discussions/1/2935742047969570844/ExploitThird Party Advisory
FAQ
What is CVE-2021-32795?
CVE-2021-32795 is a vulnerability with a CVSS score of 6.5 (MEDIUM). ArchiSteamFarm is a C# application with primary purpose of idling Steam cards from multiple accounts simultaneously. In versions prior to 4.3.1.0 a Denial of Service (aka DoS) vulnerability which allo...
How severe is CVE-2021-32795?
CVE-2021-32795 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-32795?
Check the references section above for vendor advisories and patch information. Affected products include: Archisteamfarm Project Archisteamfarm.