[原文]ICQ 98 beta on Windows NT leaks the internal IP address of a client in the TCP data segment of an ICQ packet instead of the public address (e.g. through NAT), which provides remote attackers with potentially sensitive information about the client or the internal network configuration.
ICQ contains a flaw that may lead to an unauthorized information disclosure. The problem is that the program leaks the internal IP address of a client in the TCP data segment of an ICQ packet, which will disclose network information resulting in a loss of confidentiality.
Currently, there are no known upgrades, patches, or workarounds available to correct this issue.