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Miggo AIGenerate vendor-ready rules for the observed attack patterns, plus reasoning and safe deployment guidance
| Package Name | Ecosystem | Vulnerable Versions | First Patched Version |
|---|---|---|---|
| github.com/tinfoil-factory/netfoil | go | < 0.3.0 | 0.3.0 |
Miggo AIRoot Cause AnalysisThe vulnerability, as described in GHSA-59qp-cfj3-rp64, allows for a bypass of the domain name filter by sending a DNS request with multiple questions. The application would only validate the first question, which could be a legitimate domain, while the subsequent malicious domain would be passed to the upstream DNS server. The analysis of the patch in commit e89736541a4c3d9004c9fa68957c16cb04de0770 confirms this. The core of the vulnerability is in the dns.UnmarshalRequest function, which previously allowed parsing of multiple questions. The patch rectifies this by strictly enforcing that a DNS request can only contain a single question. The dns.worker.process function is also identified as a key indicator, as it shows the flawed logic of only considering the first question from a list of questions. An attacker could exploit this by crafting a DNS request where the first question is benign and passes the filter, but a second, malicious question is also included and processed by the upstream resolver.
dns.UnmarshalRequestdns/dns_request.go
dns.worker.processdns/dns_proxy.go