SCO : Security Vulnerabilities, CVEs, CVSS score between 6 and 6.99

The STARTTLS implementation in SCO SCOoffice Server does not properly restrict I/O buffering, which allows man-in-the-middle attackers to insert commands into encrypted SMTP sessions by sending a cleartext command that is processed after TLS is in place, related to a "plaintext command injection" attack, a similar issue to CVE-2011-0411.

Directory traversal vulnerability in pkgadd in SCO UnixWare 7.1.4 before p534589 allows local users to create or append to arbitrary files via ".." sequences in an unspecified environment variable, probably PKGINST.

Vulnerability in passwd in SCO UNIX 4.0 and earlier allows attackers to cause a denial of service by preventing users from being able to log into the system.