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Q1What is this vulnerability? (Essence + Consequences)
π¨ **What is this vulnerability?** * **Essence:** A critical flaw in the **libssh server-side state machine**. * **Consequences:** Attackers can **bypass authentication** entirely! π«π No password needed.β¦
π‘οΈ **Root Cause? (CWE/Flaw)** * **CWE ID:** **CWE-592** (Design Errors). * **The Flaw:** The server's state machine logic is broken. It fails to properly validate the authentication sequence.β¦
π΅οΈ **What can hackers do? (Privileges/Data)** * **Action:** Spawn a **shell** directly. π» * **Access:** **Unauthenticated access**. They don't need a username or password.β¦
π **How to self-check? (Features/Scanning)** * **Passive Check:** Grab the SSH banner. If it indicates libssh version < 0.7.6 or < 0.8.4, you are vulnerable.β¦