CVE-2006-0537

Vulnerability

The POP3 server in Kinesphere Corporation eXchange versions before 5.0.060125 contains a buffer overflow vulnerability. The issue occurs when processing a long RCPT TO argument, which is an SMTP command but is handled by the POP3 server. This allows an attacker to overwrite memory and potentially execute arbitrary code. [1]

Exploitation

An attacker can exploit this vulnerability by sending a crafted RCPT TO command with an overly long argument to the POP3 server. No authentication is required as the command is sent before authentication. The exploit script provided in [1] demonstrates sending a buffer of 4100 bytes followed by a return address and shellcode. The attacker must have network access to the target POP3 server.

Impact

Successful exploitation allows remote attackers to execute arbitrary code on the affected system. The code runs with the privileges of the POP3 server process, which could lead to full system compromise. The impact includes potential data disclosure, modification, or denial of service.

Mitigation

The vendor released version 5.0.060125 to address this vulnerability. Users should upgrade to this version or later. No workarounds are documented in the available references. The vulnerability is not listed on CISA's Known Exploited Vulnerabilities (KEV) catalog as of the publication date.