CVE-2008-5162
HighSummary
Funkcja arc4random w jądrze FreeBSD w wersjach od 6.3 do 7.1 nie ma odpowiedniego źródła entropii przez krótki czas po uruchomieniu, co ułatwia atakującym przewidywanie wartości zwracanych przez tę funkcję. Może to prowadzić do ataków na framework GEOM oraz różne protokoły sieciowe, związane z generatorem liczb losowych Yarrow.
Risk Assessment
Brak odpowiedniego źródła entropii może umożliwić atakującym przewidywanie wartości losowych, co zwiększa ryzyko skutecznych ataków na infrastrukturę sieciową organizacji.
Recommendation
Zaleca się aktualizację systemu do nowszej wersji FreeBSD, w której problem został rozwiązany, oraz monitorowanie użycia funkcji losowych w aplikacjach krytycznych.
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Original NVD description (English source)
The arc4random function in the kernel in FreeBSD 6.3 through 7.1 does not have a proper entropy source for a short time period immediately after boot, which makes it easier for attackers to predict the function's return values and conduct certain attacks against the GEOM framework and various network protocols, related to the Yarrow random number generator.