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Q1What is this vulnerability? (Essence + Consequences)
๐จ **Essence**: OpenTSDB suffers from **OS Command Injection** via the `yrange` parameter.โฆ
๐ฆ **Affected**: **OpenTSDB** versions **through 2.4.0**. <br>๐ **Component**: The time series database's plotting functionality involving gnuplot integration.
Q4What can hackers do? (Privileges/Data)
๐ **Capabilities**: Hackers gain **Remote Code Execution (RCE)**. <br>๐ **Impact**: They can execute malware, steal sensitive info, modify data, and gain **full control** over the compromised system without credentials.
Q5Is exploitation threshold high? (Auth/Config)
โก **Threshold**: **Low**. <br>๐ **Access**: It is a **Remote** vulnerability. The description implies exploitation via the `yrange` parameter, suggesting it can be triggered over the network.โฆ
๐ **Public Exp**: **Yes**. <br>๐ **Resources**: PoCs exist on GitHub (e.g., `glowbase/CVE-2020-35476`, `vulhub`, `nuclei-templates`). PacketStorm also lists a related exploit file.
Q7How to self-check? (Features/Scanning)
๐ **Self-Check**: Scan for OpenTSDB instances running version **2.4.0 or earlier**. <br>๐งช **Test**: Use automated scanners like **Nuclei** with the specific CVE template.โฆ
๐ฉน **Fix**: Upgrade to a version **newer than 2.4.0**. <br>๐ **Status**: The vulnerability was published in Dec 2020, implying patches or newer secure versions are available from the vendor.
Q9What if no patch? (Workaround)
๐ง **Workaround**: If patching is impossible, **restrict network access** to the OpenTSDB service. Implement **WAF rules** to block command injection patterns in the `yrange` parameter.โฆ
๐ฅ **Urgency**: **HIGH**. <br>โ ๏ธ **Reason**: It is a critical **RCE** vulnerability with public exploits. Immediate patching or mitigation is required to prevent unauthorized system control.