An issue was discovered in FNET through 4.6.4. The code for processing the hostname from an LLMNR request doesn’t check for ‘{$content}’ termination. Therefore, the deduced length of the hostname doesn’t reflect the correct length of the actual data. This may lead to Information Disclosure in _fnet_llmnr_poll in fnet_llmnr.c during a response to a malicious request of the DNS class IN.

Source: CVE-2020-17467

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