CVE-2008-4934
HighSummary
Funkcja hfsplus_block_allocate w jądrze Linux przed wersją 2.6.28-rc1 nie sprawdza pewnej wartości zwracanej z funkcji read_mapping_page przed wywołaniem kmap. To umożliwia atakującym spowodowanie awarii systemu poprzez spreparowany obraz systemu plików hfsplus.
Risk Assessment
Podatność ta może prowadzić do odmowy usługi, co skutkuje awarią systemu i przestojem w działaniu organizacji. Atakujący mogą wykorzystać tę lukę do destabilizacji systemu.
Recommendation
Zaleca się aktualizację jądra Linux do wersji 2.6.28-rc1 lub nowszej, aby usunąć tę podatność. Dodatkowo, monitorowanie systemów pod kątem nietypowych obrazów systemów plików może pomóc w zapobieganiu atakom.
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Original NVD description (English source)
The hfsplus_block_allocate function in fs/hfsplus/bitmap.c in the Linux kernel before 2.6.28-rc1 does not check a certain return value from the read_mapping_page function before calling kmap, which allows attackers to cause a denial of service (system crash) via a crafted hfsplus filesystem image.