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Q1What is this vulnerability? (Essence + Consequences)
🚨 **Essence**: Path traversal flaw in Apache Tomcat JK (mod_jk) Connector. 📉 **Consequences**: Information leakage & bypassing access controls.…
🔍 **Root Cause**: Improper path normalization. The code handling the requested path before matching it to the URI-worker map failed to handle edge cases correctly.…
🏢 **Vendor**: Apache Software Foundation. 📦 **Product**: Apache Tomcat Connectors (mod_jk). 📅 **Affected Versions**: 1.2.0 through 1.2.44. ⚠️ Check your version immediately!
Q4What can hackers do? (Privileges/Data)
💻 **Capabilities**: Expose application functionality via reverse proxy. 🚫 **Bypass**: Circumvent access controls configured in httpd. 📂 **Impact**: Information disclosure of sensitive backend resources. 🔓
Q5Is exploitation threshold high? (Auth/Config)
⚙️ **Config Dependency**: Exploitation is easier if only a subset of Tomcat URLs are exposed via httpd. 🌐 **Network**: Requires network access to the mod_jk connector.…
💣 **PoC Available**: Yes! Multiple GitHub repos exist (e.g., immunIT, Jul10l1r4). 🛠️ **Scanners**: Nuclei templates are available for detection. 🌍 **Status**: Publicly known, active exploitation tools exist.
Q7How to self-check? (Features/Scanning)
🔎 **Check**: Scan for mod_jk connector versions 1.2.0-1.2.44. 📡 **Tools**: Use Nuclei with CVE-2018-11759 template. 🧪 **Test**: Send specially constructed requests to see if hidden functionality is exposed. 🛡️
Q8Is it fixed officially? (Patch/Mitigation)
✅ **Fixed**: Yes. Apache released patches/commits (e.g., r1857494, r1873980). 📥 **Action**: Upgrade to a version newer than 1.2.44. 🔄 **Red Hat**: RHSA-2019:0367 provides advisory for updates.
Q9What if no patch? (Workaround)
🚧 **Workaround**: If patching isn't immediate, restrict access to the mod_jk connector strictly via firewall rules.…
🔥 **Priority**: HIGH. 📅 **Published**: Oct 2018, but still relevant for unpatched legacy systems. ⚠️ **Risk**: Bypassing security controls is critical. 🏃♂️ **Action**: Patch ASAP or apply strict network restrictions.