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Q1What is this vulnerability? (Essence + Consequences)
π¨ **Essence**: Critical Command Injection & SQL Injection in Movable Type. <br>π₯ **Consequences**: Remote attackers can execute arbitrary Perl code via `eval` injection.β¦
π‘οΈ **Root Cause**: The `lib/MT/Upgrade.pm` module in `mt-upgrade.cgi` is flawed. <br>β **Flaw**: It processes database migration requests **without authentication**.β¦
π¦ **Affected**: Six Apart Movable Type (MT). <br>π **Versions**: Specifically **4.2x** and **4.3x through 4.38**. <br>π§ **Component**: The `mt-upgrade.cgi` script and its underlying `lib/MT/Upgrade.pm` library.
Q4What can hackers do? (Privileges/Data)
π **Privileges**: Remote Code Execution (RCE). <br>ποΈ **Data**: SQL Injection allows data manipulation. <br>β‘ **Impact**: Attackers can run arbitrary Perl commands.β¦
π **Threshold**: **LOW**. <br>π« **Auth**: **No authentication required**. <br>βοΈ **Config**: The vulnerability exists in the upgrade function which is accessible to anyone hitting the endpoint.β¦
π£ **Public Exp?**: **YES**. <br>π **Evidence**: References include an `oss-security` mailing list post and a specific exploit script (`movabletype_upgrade_exec.rb`).β¦
π **No Patch?**: **Workaround**: <br>1. **Block Access**: Restrict access to `mt-upgrade.cgi` via firewall or `.htaccess`. <br>2. **Disable**: If you don't need the upgrade feature, disable the script. <br>3.β¦
π₯ **Urgency**: **CRITICAL**. <br>β° **Priority**: **IMMEDIATE ACTION**. <br>π **Reason**: Unauthenticated RCE is one of the most dangerous vulnerability types.β¦