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Q1What is this vulnerability? (Essence + Consequences)
π¨ **Essence**: A Command Injection flaw in Accellion FTA. π **Consequences**: Attackers can execute arbitrary code remotely via the `oauth_token` parameter. π₯ **Impact**: Full system compromise.
Q2Root Cause? (CWE/Flaw)
π‘οΈ **Root Cause**: Improper neutralization of special elements used in an OS command (CWE-78). π **Flaw**: The `oauth_token` parameter accepts shell metacharacters without sanitization.β¦
π’ **Vendor**: Accellion. π¦ **Product**: File Transfer Appliance (FTA). π **Affected Versions**: All versions prior to **FTA_9_11_210**. π« **Safe**: Version 9_11_210 and later.
Q4What can hackers do? (Privileges/Data)
π **Privileges**: Remote attackers gain the ability to run commands. π» **Action**: Execute arbitrary code on the server. π **Data**: Potential access to all files and system configurations.β¦
π **Threshold**: LOW. π **Auth**: Remote exploitation possible. π **Config**: No specific authentication mentioned as a barrier for the injection vector itself. β‘ **Ease**: Simple parameter manipulation.
Q6Is there a public Exp? (PoC/Wild Exploitation)
π₯ **Public Exp?**: YES. π **Sources**: Exploit-DB (ID: 37597), Rapid7 Metasploit module, PacketStorm. π οΈ **Status**: Active exploitation tools are available. π¨ **Risk**: High likelihood of wild exploitation.
Q7How to self-check? (Features/Scanning)
π **Check**: Scan for Accellion FTA services. π‘ **Feature**: Look for `oauth_token` parameter in HTTP requests. π **Scan**: Use Nessus or Metasploit modules to detect the vulnerability signature.β¦
π‘οΈ **Fixed?**: YES. π₯ **Patch**: Upgrade to **Accellion FTA version 9_11_210** or later. π **Action**: Apply vendor security updates immediately. β **Solution**: Official patch resolves the injection flaw.
Q9What if no patch? (Workaround)
π§ **No Patch?**: Isolate the FTA from the internet. π **Mitigation**: Block external access to the `oauth_token` endpoint. π **Workaround**: Input validation at the WAF level to block shell metacharacters.β¦