An exploitable heap-based buffer overflow vulnerability exists in the readlegacybiff function of FreeXL 1.0.3. A specially crafted XLS file can cause a memory corruption resulting in remote code execution. An attacker can send malicious XLS file to trigger this vulnerability.

An exploitable heap based buffer overflow vulnerability exists in the 'readbiffnextrecord function' of FreeXL 1.0.3. A specially crafted XLS file can cause a memory corruption resulting in remote code execution. An attacker can send malicious XLS file to trigger this vulnerability.