CVE-2012-0024
HighSummary
MaraDNS w wersjach przed 1.3.07.12 oraz 1.4.x przed 1.4.08 oblicza wartości skrótów dla danych DNS bez ograniczeń, co pozwala na przewidywalne wywoływanie kolizji skrótów. To umożliwia zdalnym atakującym spowodowanie odmowy usługi (zużycie CPU) poprzez wysyłanie wielu spreparowanych zapytań z ustawionym bitem Recursion Desired (RD).
Risk Assessment
Atakujący mogą wykorzystać tę podatność do przeciążenia serwera DNS, co prowadzi do spadku wydajności lub całkowitej niedostępności usługi. Może to wpłynąć na dostępność usług internetowych w organizacji.
Recommendation
Zaleca się aktualizację MaraDNS do najnowszej wersji, aby usunąć tę podatność. Dodatkowo, warto monitorować ruch DNS w celu wykrywania potencjalnych ataków.
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Original NVD description (English source)
MaraDNS before 1.3.07.12 and 1.4.x before 1.4.08 computes hash values for DNS data without restricting the ability to trigger hash collisions predictably, which allows remote attackers to cause a denial of service (CPU consumption) by sending many crafted queries with the Recursion Desired (RD) bit set.

