CVE-2022-27518 is a vulnerability that affects Citrix servers, specifically the Citrix Application Delivery Controller (ADC) and the Citrix Gateway. This vulnerability allows an attacker to remotely execute code on the affected server, potentially giving them full control over the server.
This vulnerability was discovered and reported by Positive Technologies in November 2022. It is caused by a lack of proper input validation in the server, allowing an attacker to send malicious requests that can execute arbitrary code.
Now, according to NCC Group's Fox-IT research team, thousands of internet-facing Citrix servers are still unpatched, making them an attractive target for hacking crews.
This includes over 3,500 Citrix ADC and Gateway servers running version 12.1-65.21 that are susceptible to CVE-2022-27518.
To protect against this vulnerability, Citrix has released patches for both the ADC and Gateway products. It is important that corporations using these products apply the patches as soon as possible to prevent their servers from being exploited.
In addition to applying the patches, there are several other steps that corporations can take to protect against this vulnerability:
Ensure that all servers are up-to-date with the latest patches and security updates.
Use network segmentation to isolate servers from other parts of the network, reducing the attack surface.
Monitor network traffic for any unusual activity, such as requests that contain malicious payloads.
Use firewalls and other security measures to block access to known malicious IP addresses or domains.
By taking these precautions, corporations can help to protect their servers against the CVE-2022-27518 vulnerability and other security threats.
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