CVE-2012-3456

CVE-2012-3456 describes a heap-based buffer overflow in the Microsoft import filter of Calligra 2.4.3 and earlier, specifically within the read function in filters/words/msword-odf/wv2/src/styles.cpp. This vulnerability allows remote attackers to trigger a denial of service and potentially execute arbitrary code through a specially crafted ODF document containing malicious style information. With a CVSS score of 7.5, it is considered highly severe, requiring no authentication and having low attack complexity, potentially leading to partial confidentiality, integrity, and availability impacts. While there is no evidence of active exploitation or Metasploit/Nuclei modules, an ExploitDB entry (EDB-37576) exists, indicating public exploit code availability, though community discussion and media coverage are minimal.