Hacking

Threat actors are actively exploiting CVE-2022-1388 RCE in F5 BIG-IP

Threat actors are exploiting critical F5 BIG-IP flaw CVE-2022-1388 to deliver malicious code, cybersecurity researchers warn.

Threat actors started massively exploiting the critical remote code execution vulnerability, tracked as CVE-2022-1388, affecting F5 BIG-IP.

Last week security and application delivery solutions provider F5 released its security notification to inform customers that it has released security updates from tens of vulnerabilities in its products.

The company addressed a total of 43 vulnerabilities, the most severe one is a critical issue tracked as CVE-2022-1388 (CVSS score of 9.8). An unauthenticated attacker with network access to the BIG-IP system through the management port and/or self IP addresses can exploit the CVE-2022-1388 flaw to execute arbitrary system commands, create or delete files, or disable services.

“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.” reads the advisory published by the vendor.”

The flaw affects the following versions:

16.1.0 – 16.1.2
15.1.0 – 15.1.5
14.1.0 – 14.1.4
13.1.0 – 13.1.4
12.1.0 – 12.1.6
11.6.1 – 11.6.5

and the vendor addressed it with the release of:

17.0.0
16.1.2.2
15.1.5.1
14.1.4.6
13.1.5

The company provided the following temporary mitigations for customers that cannot install the patched versions:

Researchers from Positive Technologies and Horizon3 Attack Team developed their own exploit code for CVE-2022-1388 and explained that the issue is trivial to exploit.

The popular researcher Kevin Beaumont confirmed the attack the ongoing attacks, but pointed out that they are not targeting the management interface.

The researcher Germán Fernández reported that threat actors are exploiting the flaw to drop PHP webshells to “/tmp/f5.sh” and install them to “/usr/local/www/xui/common/css/.”

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Pierluigi Paganini

(SecurityAffairs – hacking, F5 BIG-IP)

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Pierluigi Paganini

Pierluigi Paganini is member of the ENISA (European Union Agency for Network and Information Security) Threat Landscape Stakeholder Group and Cyber G7 Group, he is also a Security Evangelist, Security Analyst and Freelance Writer. Editor-in-Chief at "Cyber Defense Magazine", Pierluigi is a cyber security expert with over 20 years experience in the field, he is Certified Ethical Hacker at EC Council in London. The passion for writing and a strong belief that security is founded on sharing and awareness led Pierluigi to find the security blog "Security Affairs" recently named a Top National Security Resource for US. Pierluigi is a member of the "The Hacker News" team and he is a writer for some major publications in the field such as Cyber War Zone, ICTTF, Infosec Island, Infosec Institute, The Hacker News Magazine and for many other Security magazines. Author of the Books "The Deep Dark Web" and “Digital Virtual Currency and Bitcoin”.

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