CVE-2008-3911
HighSummary
Funkcja proc_do_xprt w jądrze Linux 2.6.26.3 nie sprawdza długości pewnego bufora uzyskanego z przestrzeni użytkownika, co pozwala lokalnym użytkownikom na przepełnienie bufora opartego na stosie. Może to prowadzić do nieokreślonych skutków poprzez odpowiednio skonstruowane wywołanie systemowe odczytu dla pliku /proc/sys/sunrpc/transports.
Risk Assessment
Przepełnienie bufora może prowadzić do nieautoryzowanego dostępu do systemu lub destabilizacji jego działania. Organizacje powinny być świadome potencjalnych zagrożeń związanych z lokalnymi użytkownikami.
Recommendation
Zaleca się aktualizację jądra Linux do najnowszej wersji, aby usunąć tę podatność. Dodatkowo, warto ograniczyć dostęp do systemu dla lokalnych użytkowników, którzy nie są zaufani.
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Original NVD description (English source)
The proc_do_xprt function in net/sunrpc/sysctl.c in the Linux kernel 2.6.26.3 does not check the length of a certain buffer obtained from userspace, which allows local users to overflow a stack-based buffer and have unspecified other impact via a crafted read system call for the /proc/sys/sunrpc/transports file.