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Q1What is this vulnerability? (Essence + Consequences)
๐จ **Essence**: MITRE Caldera has a critical Remote Code Execution (RCE) flaw. ๐ **Consequences**: Attackers can run arbitrary code on the server via crafted web requests.โฆ
๐ก๏ธ **Root Cause**: CWE-78 (OS Command Injection). ๐ **Flaw**: The dynamic proxy compilation feature is vulnerable. It fails to sanitize inputs properly, allowing shell commands to be injected and executed.
Q3Who is affected? (Versions/Components)
๐ฆ **Affected**: MITRE Caldera versions **4.2.0 and earlier** AND **5.0.0 and earlier**. ๐ข **Vendor**: MITRE. If you are running any version prior to the fix, you are at risk.
Q4What can hackers do? (Privileges/Data)
๐ **Privileges**: Full system control. ๐ **Data**: Complete compromise of Confidentiality, Integrity, and Availability. Attackers gain **High** impact on all security metrics (C:H, I:H, A:H) due to Server Change (S:C).
Q5Is exploitation threshold high? (Auth/Config)
โก **Threshold**: LOW. ๐ **Access**: Network Accessible (AV:N). ๐ซ **Auth**: No Privileges Required (PR:N). ๐ **UI**: No User Interaction Needed (UI:N). This is a nightmare scenario for unauthenticated remote exploitation.
Q6Is there a public Exp? (PoC/Wild Exploitation)
๐ข **Public Exp?**: Yes, referenced in official advisories and GitHub PRs. ๐ **Status**: While specific PoC code isn't in the snippet, the vulnerability is well-documented with commits fixing it.โฆ
๐ **Check**: Scan for MITRE Caldera instances exposed to the network. ๐งช **Test**: Look for the dynamic proxy compilation endpoints. If the service is running an affected version, it is vulnerable.โฆ
โ **Fixed**: Yes. ๐ **Patch**: Refer to GitHub Pull Requests #3129 and #3131. ๐ **Action**: Update to the version containing commit `35bc06e` or later. Check the official releases page for the patched binary.
Q9What if no patch? (Workaround)
๐ **Workaround**: If patching is delayed, **disable the dynamic proxy compilation feature** immediately. ๐ง **Mitigation**: Restrict network access to the Caldera server.โฆ
๐ฅ **Urgency**: CRITICAL. ๐จ **Priority**: Immediate Action Required. With CVSS 3.1 High severity and no auth required, this is a top-priority vulnerability. Patch now or isolate the system.