Patch

CVE-2024-36401

with vRx

Vulnerability Overview

CVE Name

CVE-2024-36401

Severity

9.8

Critical

CVE Description

GeoServer is an open source server that allows users to share and edit geospatial data. Prior to versions 2.23.6, 2.24.4, and 2.25.2, multiple OGC request parameters allow Remote Code Execution (RCE) by unauthenticated users through specially crafted input...

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Latest Patch info

There is no patch available at the moment, but you can use our script.

Patch Name

security-advisories@github.com

Date

02.07.2024

Script

Script Type

Remediation script

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🔒 CVE-2024-36401: Critical Remote Code Execution Vulnerability in GeoServer GeoServer has been found to have a critical vulnerability (CVE-2024-36401) that allows remote code execution by unauthenticated users. This issue arises from unsafe evaluation of property names as XPath expressions due to flaws in the GeoTools library API, affecting GeoServer installations. 🔍 How it works: The provided Bash script remediates this vulnerability by removing the vulnerable gt-complex-*.jar file from GeoServer WAR files or binary installations. The script first checks if zip is installed, then processes the GeoServer WAR file or binary directory to remove the vulnerable jar file. After confirming the removal, it repackages the WAR file or verifies the removal in binary installations. WAR Deployment Remediation: Creates a temporary directory. Extracts the WAR file. Finds and removes the vulnerable jar. Repackages the WAR file. Binary Installation Remediation: Finds and removes the vulnerable jar directly from the GeoServer directory. To use the script, follow these steps: Save the script content to a file, e.g., remediate_geoserver.sh. Make the script executable: chmod +x remediate_geoserver.sh Run the script with the appropriate mode (war or binary) and the path to the WAR file or GeoServer directory: ./remediate_geoserver.sh war /path/to/geoserver.war or ./remediate_geoserver.sh binary /path/to/geoserver ⚠️ Why it matters: Implementing this script is crucial as it mitigates the risk of remote code execution attacks that can compromise the entire server. This vulnerability has a high CVSS score of 9.8, indicating its criticality and the potential impact on GeoServer installations globally. By using this script, administrators can promptly address the vulnerability and secure their systems until a proper update is applied.

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#!/bin/bash

# Check if zip is installed
check_zip_installed() {
    if ! command -v zip &> /dev/null; then
        echo "zip command not found. Please install it to proceed."
        exit 0
    fi
}

# Remove the vulnerable jar from a WAR deployment
remediate_war_deployment() {
    local war_file=$1

# Ensure the war file exists
    if [ ! -f "$war_file" ]; then
        echo "WAR file $war_file does not exist!"
        exit 0
    fi

# Create a temporary directory
    local temp_dir=$(mktemp -d)
    echo "Created temporary directory $temp_dir"
    unzip "$war_file" -d "$temp_dir" > /dev/null 2>&1

# Remove the vulnerable jar
    local jar_path
    jar_path=$(find "$temp_dir/WEB-INF/lib" -name "gt-complex-*.jar")
    if [ -n "$jar_path" ]; then
        echo "Found vulnerable jar at $jar_path"
        rm "$jar_path" > /dev/null 2>&1
        if [ $? -eq 0 ]; then
            echo "Vulnerable jar removed successfully."
        else
            echo "Failed to remove vulnerable jar."
        fi
    else
        echo "Vulnerable jar not found in $war_file"
    fi

# Verify the jar is removed
    if [ -f "$jar_path" ]; then
        echo "Vulnerable jar still exists after removal attempt."
    else
        echo "Vulnerable jar does not exist after removal."
    fi

# Zip the directory back into a new WAR file
    local new_war_file="${war_file%.war}-remediated.war"
    (cd "$temp_dir" && zip -r "$new_war_file" . > /dev/null 2>&1)

rm -rf "$temp_dir" > /dev/null 2>&1

echo "Remediated WAR file created at $new_war_file"
}

# Remove the vulnerable jar from a binary installation
remediate_binary_installation() {
    local geoserver_dir=$1

# Ensure the GeoServer directory exists
    if [ ! -d "$geoserver_dir" ]; then
        echo "GeoServer directory $geoserver_dir does not exist!"
        exit 0
    fi

# Remove the vulnerable jar
    local jar_path
    jar_path=$(find "$geoserver_dir/webapps/geoserver/WEB-INF/lib" -name "gt-complex-*.jar")
    if [ -n "$jar_path" ]; then
        echo "Found vulnerable jar at $jar_path"
        rm "$jar_path" > /dev/null 2>&1
        if [ $? -eq 0 ]; then
            echo "Vulnerable jar removed successfully."
        else
            echo "Failed to remove vulnerable jar."
        fi
    else
        echo "Vulnerable jar not found in $geoserver_dir"
    fi

# Verify the jar is removed
    if [ -f "$jar_path" ]; then
        echo "Vulnerable jar still exists after removal attempt."
    else
        echo "Vulnerable jar does not exist after removal."
    fi
}

main() {
    local mode=$1
    local path=$2

if [ -z "$mode" ] || [ -z "$path" ]; then
        echo "Usage: $0 <war|binary> <path>"
        exit 0
    fi

check_zip_installed

case $mode in
        war)
            echo "Remediating WAR deployment..."
            remediate_war_deployment "$path"
            ;;
        binary)
            echo "Remediating binary installation..."
            remediate_binary_installation "$path"
            ;;
        *)
            echo "Unknown mode: $mode. Use 'war' or 'binary'."
            exit 0
            ;;
    esac
}

# Run the main function with the provided arguments
main "$@"

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Affected OS & Apps

Geotools

Geoserver

4.8

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