Q: What can hackers do? (Privileges/Data)

🕵️ **Action**: Send crafted syslog packets. 🎯 **Goal**: Trigger crash via long TAG. 🔓 **Privilege**: **No** code execution mentioned. 🚫 **Impact**: **DoS** (App exit). Logs go dark. No data theft directly.

Q: Is exploitation threshold high? (Auth/Config)

🔓 **Auth**: **None required**. 🌐 **Network**: Remote exploitation possible. ⚙️ **Config**: Must be receiving legacy syslog messages. 📶 **Threshold**: **Low**. Easy to trigger if logging is active.

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

📜 **PoC**: Listed in references (BID 49413, Secunia 46027). 🌍 **Wild Exp**: Not explicitly confirmed as widespread worm, but **public advisories exist**. ⚠️ Proof-of-concept likely available via security databases.

Q: How to self-check? (Features/Scanning)

🔍 **Check**: Scan for Rsyslog versions. 📋 **Verify**: Is version < 4.6.9 or 5.2.0-5.8.4? 📡 **Test**: Send oversized TAG in syslog UDP/TCP. 💻 **Tool**: Use Nmap scripts or custom Python script to send malformed syslog.

Q: Is it fixed officially? (Patch/Mitigation)

✅ **Fixed**: Yes. 🛠️ **Patch**: Upgrade to **Rsyslog 4.6.9+** or **5.8.5+**. 📥 **Sources**: RedHat (RHSA-2011:1247), SUSE (openSUSE-SU-2011:1020). 🔄 **Action**: Update immediately.

Q: What if no patch? (Workaround)

🚧 **Workaround**: Disable legacy syslog parsing. 🛑 **Filter**: Block external syslog sources if possible. 📝 **Monitor**: Watch for app crashes. 🔄 **Alternative**: Use newer Rsyslog config syntax (avoid legacy mode).

Question 1

What is this vulnerability? (Essence + Consequences)

Accepted Answer

🚨 **Essence**: Stack-based buffer overflow in `parseLegacySyslogMsg()`. 💥 **Consequence**: Remote attackers send **ultra-long TAGs** in legacy syslog messages. Result: **Application crash** (Denial of Service).…

Question 2

Root Cause? (CWE/Flaw)

Accepted Answer

🛡️ **Root Cause**: **Stack-based buffer overflow**. 🐛 **Flaw**: The function fails to properly bound-check the length of the 'TAG' field in legacy syslog messages. ⚠️ No validation before copying data to the stack.

Question 3

Who is affected? (Versions/Components)

Accepted Answer

🎯 **Affected**: **Adiscon Rsyslog**. 📦 **Versions**: < 4.6.9 (4.6.x series) AND 5.2.0 – 5.8.4. 📅 **Published**: 2011-09-06. 🌍 **Vendor**: Adiscon (Germany).

Question 4

What can hackers do? (Privileges/Data)

Accepted Answer

🕵️ **Action**: Send crafted syslog packets. 🎯 **Goal**: Trigger crash via long TAG. 🔓 **Privilege**: **No** code execution mentioned. 🚫 **Impact**: **DoS** (App exit). Logs go dark. No data theft directly.

Question 5

Is exploitation threshold high? (Auth/Config)

Accepted Answer

🔓 **Auth**: **None required**. 🌐 **Network**: Remote exploitation possible. ⚙️ **Config**: Must be receiving legacy syslog messages. 📶 **Threshold**: **Low**. Easy to trigger if logging is active.

Question 6

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

Accepted Answer

📜 **PoC**: Listed in references (BID 49413, Secunia 46027). 🌍 **Wild Exp**: Not explicitly confirmed as widespread worm, but **public advisories exist**. ⚠️ Proof-of-concept likely available via security databases.

Question 7

How to self-check? (Features/Scanning)

Accepted Answer

🔍 **Check**: Scan for Rsyslog versions. 📋 **Verify**: Is version < 4.6.9 or 5.2.0-5.8.4? 📡 **Test**: Send oversized TAG in syslog UDP/TCP. 💻 **Tool**: Use Nmap scripts or custom Python script to send malformed syslog.

Question 8

Is it fixed officially? (Patch/Mitigation)

Accepted Answer

✅ **Fixed**: Yes. 🛠️ **Patch**: Upgrade to **Rsyslog 4.6.9+** or **5.8.5+**. 📥 **Sources**: RedHat (RHSA-2011:1247), SUSE (openSUSE-SU-2011:1020). 🔄 **Action**: Update immediately.

Question 9

What if no patch? (Workaround)

Accepted Answer

🚧 **Workaround**: Disable legacy syslog parsing. 🛑 **Filter**: Block external syslog sources if possible. 📝 **Monitor**: Watch for app crashes. 🔄 **Alternative**: Use newer Rsyslog config syntax (avoid legacy mode).

Question 10

Is it urgent? (Priority Suggestion)

Accepted Answer

🔥 **Priority**: **High** for affected systems. 📉 **Risk**: DoS affects log integrity & monitoring. 🆘 **Urgency**: Fix ASAP. 📅 **Age**: Old (2011), but legacy systems may still run vulnerable versions.…

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CVE-2011-3200 — 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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