CVE-2008-5396
HighSummary
Błąd indeksu tablicy w sterownikach torisa.c i dahdi/tor2.c w Zaptel (znanym również jako DAHDI) w wersji 1.4.11 i wcześniejszych pozwala lokalnym użytkownikom w grupie dialout na nadpisanie wartości całkowitej w pamięci jądra poprzez zapis do /dev/zap/ctl, związany z brakiem walidacji pola synchronizacji powiązanego z ioctl ZT_SPANCONFIG.
Risk Assessment
Podatność ta może prowadzić do nieautoryzowanego dostępu do pamięci jądra, co stwarza ryzyko destabilizacji systemu oraz potencjalnego przejęcia kontroli nad nim przez lokalnych użytkowników.
Recommendation
Zaleca się aktualizację do nowszej wersji Zaptel, która zawiera poprawki eliminujące ten błąd oraz wdrożenie odpowiednich środków kontroli dostępu dla grupy dialout.
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Original NVD description (English source)
Array index error in the (1) torisa.c and (2) dahdi/tor2.c drivers in Zaptel (aka DAHDI) 1.4.11 and earlier allows local users in the dialout group to overwrite an integer value in kernel memory by writing to /dev/zap/ctl, related to missing validation of the sync field associated with the ZT_SPANCONFIG ioctl.