A remote overflow exists in 2fax. The 2fax fails to check boundary error in the "expandtabs()" function, resulting in a buffer overflow. With a specially crafted request, an attacker can execute arbitrary code on the system, resulting in a loss of integrity and confidentiality.
Upgrade to version 3.05 or higher, as it has been reported to fix this vulnerability. An upgrade is required as there are no known workarounds.