CVE-2008-4405
HighSummary
W wersji 3.0.3 Xen, xend nie ogranicza prawidłowo zawartości katalogu /local/domain w drzewie xenstore oraz nie restrykcjonuje dostępu do zapisu dla gościnnych maszyn wirtualnych, co pozwala użytkownikom systemu operacyjnego gościa na wywołanie odmowy usługi oraz potencjalnie inne nieokreślone skutki przez zapis do (1) console/tty, (2) console/limit lub (3) image/device-model-pid.
Risk Assessment
Organizacja może być narażona na ataki typu denial of service, co może prowadzić do przestojów w działaniu usług oraz wpływać na stabilność systemów wirtualnych.
Recommendation
Zaleca się aktualizację do najnowszej wersji Xen oraz wdrożenie odpowiednich ograniczeń dostępu do katalogu xenstore dla gościnnych maszyn wirtualnych.
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Original NVD description (English source)
xend in Xen 3.0.3 does not properly limit the contents of the /local/domain xenstore directory tree, and does not properly restrict a guest VM's write access within this tree, which allows guest OS users to cause a denial of service and possibly have unspecified other impact by writing to (1) console/tty, (2) console/limit, or (3) image/device-model-pid. NOTE: this issue was originally reported as an issue in libvirt 0.3.3 and xenstore, but CVE is considering the core issue to be related to Xen.