CVE-2021-32795 Information

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 Vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Reference

https://steamcommunity.com/groups/archiasf/discussions/1/2935742047969570844/ https://github.com/JustArchiNET/ArchiSteamFarm/security/advisories/GHSA-5v34-4prm-9474 https://github.com/JustArchiNET/ArchiSteamFarm/commit/4cd581ec041912cf199c5512fe6d1dcaec0594c0

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

NONE

Base Score

HIGH

Base Severity

5.9