The Apache OpenOffice Project reports:
An OpenDocument Presentation .ODP or Presentation Template
.OTP file can contain invalid presentation elements that lead
to memory corruption when the document is loaded in Apache
OpenOffice Impress. The defect may cause the document to appear
as corrupted and OpenOffice may crash in a recovery-stuck mode
requiring manual intervention. A crafted exploitation of the
defect can allow an attacker to cause denial of service
(memory corruption and application crash) and possible
execution of arbitrary code.