Multiple heap-based buffer overflows in WordPerfect Document importer/exporter (libwpd) before 0.8.9 allow user-assisted remote attackers to cause a denial of service (application crash) and possibly execute arbitrary code via a crafted WordPerfect file in which values to loop counters are not properly handled in the (1) WP3TablesGroup::_readContents and (2) WP5DefinitionGroup_DefineTablesSubGroup::WP5DefinitionGroup_DefineTablesSubGroup functions. NOTE: the integer overflow has been split into CVE-2007-1466.
The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.