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Q1What is this vulnerability? (Essence + Consequences)
🚨 **Essence**: Cisco DCNM has a **Trust Management** flaw. <br>🔥 **Consequences**: Attackers can bypass authentication. They create **valid session tokens** using static keys.…
🛡️ **CWE**: **CWE-798** (Use of Hard-coded Credentials). <br>❌ **Flaw**: The system relies on **static keys** for session token generation. This breaks the trust model, allowing anyone with the key to forge identity.
Q3Who is affected? (Versions/Components)
🏢 **Vendor**: **Cisco**. <br>📦 **Product**: **Data Center Network Manager (DCNM)**. <br>📉 **Affected**: Versions **prior to 11.3**. If you run 11.2 or older, you are vulnerable.
Q4What can hackers do? (Privileges/Data)
💀 **Privileges**: **Management/Admin** level access. <br>📂 **Data**: Full control over **Cisco Nexus & MDS switches**.…
⚡ **Threshold**: **LOW**. <br>🔑 **Auth**: No valid user credentials needed. Just the **static key** and ability to send requests. <br>🌐 **Config**: Remote exploitation is possible. No physical access required.
Q6Is there a public Exp? (PoC/Wild Exploitation)
📢 **Public Exp?**: **YES**. <br>📄 **Evidence**: PacketStormSecurity lists a **Remote Code Execution** exploit for DCNM 11.2. Wild exploitation is highly likely given the simplicity of the flaw.
Q7How to self-check? (Features/Scanning)
🔍 **Self-Check**: <br>1. Check DCNM version: Is it **< 11.3**? <br>2. Scan for **static key** usage in auth modules. <br>3. Monitor for unauthorized **session token** creation patterns.
Q8Is it fixed officially? (Patch/Mitigation)
✅ **Fixed?**: **YES**. <br>🩹 **Patch**: Upgrade to **Cisco DCNM 11.3** or later. <br>📝 **Ref**: See Cisco Security Advisory (cisco-sa-20200102-dcnm-auth-bypass).
Q9What if no patch? (Workaround)
🚧 **No Patch?**: <br>1. **Isolate** the DCNM server from untrusted networks. <br>2. **Restrict** access to management interfaces via ACLs. <br>3. **Monitor** logs for suspicious authentication attempts.