The bdrv_open function in Qemu 1.0 does not properly handle the failure of the mkstemp function, when in snapshot node, which allows local users to overwrite or read arbitrary files via a symlink attack on an unspecified temporary file.
Exploitability
AV:LAC:MAu:NImpact
C:PI:PA:P4.4/AV:L/AC:M/Au:N/C:P/I:P/A:P