CVE-2013-4854
HighSummary
Implementacja RFC 5011 w pliku rdata.c w ISC BIND 9.7.x i 9.8.x przed wersją 9.8.5-P2, 9.8.6b1, 9.9.x przed 9.9.3-P2 oraz 9.9.4b1, a także w DNSco BIND 9.9.3-S1 przed 9.9.3-S1-P1 i 9.9.4-S1b1, pozwala zdalnym atakującym na wywołanie odmowy usługi (błąd asercji i zakończenie działania demona named) poprzez zapytanie z nieprawidłową sekcją RDATA, która nie jest prawidłowo obsługiwana podczas tworzenia komunikatu logu. Podatność ta była wykorzystywana w praktyce w lipcu 2013 roku.
Risk Assessment
Organizacje mogą doświadczyć przerwy w działaniu usług DNS, co może prowadzić do zakłóceń w dostępności aplikacji i systemów zależnych od DNS. Atakujący mogą wykorzystać tę podatność do destabilizacji infrastruktury sieciowej.
Recommendation
Zaleca się aktualizację do najnowszej wersji BIND, która zawiera poprawki dla tej podatności. Należy również monitorować logi serwera DNS w celu wykrywania potencjalnych prób ataków.
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Original NVD description (English source)
The RFC 5011 implementation in rdata.c in ISC BIND 9.7.x and 9.8.x before 9.8.5-P2, 9.8.6b1, 9.9.x before 9.9.3-P2, and 9.9.4b1, and DNSco BIND 9.9.3-S1 before 9.9.3-S1-P1 and 9.9.4-S1b1, allows remote attackers to cause a denial of service (assertion failure and named daemon exit) via a query with a malformed RDATA section that is not properly handled during construction of a log message, as exploited in the wild in July 2013.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS

