Auto-port 5.0: Dns: Insufficient Bailiwick Validation for NS Records#16899
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Motivation: Netty's `DnsResolveContext` insufficiently validates the bailiwick of NS records, enabling DNS Cache Poisoning. An attacker controlling an authoritative name server for a subdomain can poison the cache for parent domains (like `.co.uk`). Modifications: - Add correct Bailiwick checks when caching NS. - Adjust tests Result: No more risk of cache poising (cherry picked from commit 6f19adf)
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Auto-port of #16877 to 5.0
Cherry-picked commit: 6f19adf
Motivation:
Netty's
DnsResolveContextinsufficiently validates the bailiwick of NS records, enabling DNS Cache Poisoning. An attacker controlling an authoritative name server for a subdomain can poison the cache for parent domains (like.co.uk).Modifications:
Result:
No more risk of cache poising