CVE-2021-32795

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Summary

CVECVE-2021-32795
StatePUBLIC
Assigner[email protected]
Source PriorityCVE Program / NVD first with legacy fallback
Published2021-07-26 20:15:00 UTC
Updated2021-08-13 18:23:00 UTC
DescriptionArchiSteamFarm 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.

Risk And Classification

Problem Types: CWE-20

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Archisteamfarm Project Archisteamfarm All All All All

References

ReferenceSourceLinkTags
Avoid crash on commandPrefix message + hardening · JustArchiNET/ArchiSteamFarm@4cd581e · GitHub MISC github.com
Denial of Service via Steam chat · Advisory · JustArchiNET/ArchiSteamFarm · GitHub CONFIRM github.com
ASF Crash (raspbian) :: Archi's SC Farm MISC steamcommunity.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

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