Question 1

What is this vulnerability? (Essence + Consequences)

Accepted Answer

🚨 **Essence**: Land Software Faust iServer suffers from a **Path Traversal** vulnerability leading to **Local File Inclusion (LFI)**.…

Question 2

Root Cause? (CWE/Flaw)

Accepted Answer

🛡️ **Root Cause**: The software fails to restrict **Local File Inclusion**.…

Question 3

Who is affected? (Versions/Components)

Accepted Answer

🏢 **Vendor**: Land Software (Germany).
📦 **Product**: Faust iServer.
📅 **Affected Versions**: **9.0.017.017.1** through **9.0.018.018.4**.
✅ **Safe**: Version **9.0.019.019.7** and above are not susceptible.

Question 4

What can hackers do? (Privileges/Data)

Accepted Answer

🕵️ **Attacker Actions**:
1. **Read Sensitive Data**: Access system files, configs, or database credentials via LFI.
2. **Information Disclosure**: Map the server's internal directory structure.…

Question 5

Is exploitation threshold high? (Auth/Config)

Accepted Answer

🔓 **Exploitation Threshold**: **LOW**.
🌐 **Auth**: Likely requires no authentication (public URL exposure).
⚙️ **Config**: Exploits standard URL parsing behavior.…

Question 6

Is there a public Exp? (PoC/Wild Exploitation)

Accepted Answer

💻 **Public Exploit**: **YES**.
📂 **PoC Available**: Proof of Concept exists in **Nuclei Templates** (projectdiscovery/nuclei-templates).…

Question 7

How to self-check? (Features/Scanning)

Accepted Answer

🔍 **Self-Check Method**:
1. Use **Nuclei** with the CVE-2021-34805 template.
2. Manually test URLs by injecting `%2e%2e%5c` (../) into request paths.
3.…

Question 8

Is it fixed officially? (Patch/Mitigation)

Accepted Answer

🩹 **Official Fix**: **YES**.
📦 **Patch**: Upgrade to version **9.0.019.019.7** or later.
🔗 **Reference**: Land Software official site (land-software.de) provides the updated iServer.

Question 9

What if no patch? (Workaround)

Accepted Answer

🚧 **No Patch Workaround**:
1. **WAF Rules**: Block requests containing `%2e%2e` or `..` in URL parameters.
2. **Access Control**: Restrict access to Faust iServer ports to trusted IPs only.
3.…

Question 10

Is it urgent? (Priority Suggestion)

Accepted Answer

⚡ **Urgency**: **HIGH**.
📉 **Priority**: **P1/P2**.
💡 **Reason**: LFI is a critical vulnerability class with easy exploitation and high impact (data breach). Immediate patching or mitigation is recommended.

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CVE-2021-34805 — AI Deep Analysis Summary

Q1What is this vulnerability? (Essence + Consequences)

Q2Root Cause? (CWE/Flaw)

Q3Who is affected? (Versions/Components)

Q4What can hackers do? (Privileges/Data)

Q5Is exploitation threshold high? (Auth/Config)

Q6Is there a public Exp? (PoC/Wild Exploitation)

Q7How to self-check? (Features/Scanning)

Q8Is it fixed officially? (Patch/Mitigation)

Q9What if no patch? (Workaround)

Q10Is it urgent? (Priority Suggestion)

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