An unspecified vulnerability was found in LibreOffice 4.3.х before 4.3.7, LibreOffice 4.4.х before 4.4.2. By exploiting this vulnerability malicious users can cause denial of service (crash) or possibly execute arbitrary code. This vulnerability can be exploited via a crafted HWP document.

LibreOffice before 4.3.7

LibreOffice 4.4.х before 4.4.2

Update to the latest version
LibreOffice 4.4.2
LibreOffice 4.3.7

LibreOffice Security Advisory