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Fencer Intel
high —

GHSA-xvg2-cgv6-6h7v json

netfoil: Incorrect block responses could lead to localhost traffic

published 3mo ago modified 2mo ago also GO-2026-6143

cvss
—
not scored
cisa kev
Not listed
not in CISA's catalog
epss
—
no score, EPSS covers CVEs only
public exploits
0
none known

Summary

### Summary `0.0.0.0` was used instead of NXDOMAIN for block responses. On Linux, which is the target platform for netfoil, the `0.0.0.0` is sent to localhost rather than just dropped.

### Impact Unintended traffic could be sent to localhost. Impact depends on running services and firewall rules.

Patch / fix

  • go github.com/tinfoil-factory/netfoil 0.4.0

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Affected packages

ecosystem package affected fixed in
go github.com/tinfoil-factory/netfoil
<0.4.0
0.4.0

Classification

Weakness
  • CWE-693 Protection Mechanism Failure

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.