Title: AIX Sendmail Open Relay Default Configuration Weakness
Severity: MODERATE
Description:
Sendmail is a freely available, open source mail transport agent. It is available for various UNIX and Linux operating systems.
A problem with the default sendmail implementation on AIX systems may lead to violations in security policy.
It has been reported that the default sendmail configuration on AIX systems enables promiscuous e-mail relaying options. Because of this, a remote attacker may be able to use the e-mail server to obscure the origins of e-mail.
The problem is in the default sendmail.cf deployed with AIX. The sendmail.cf enables options that can allow anonymous remote users to relay e-mail through AIX systems. This could be used for spam, e-mail attacks, or other nefarious purposes.
Affected Products:
- IBM AIX 4.3.0
- IBM AIX 4.3.1
- IBM AIX 4.3.2
- IBM AIX 4.3.3
- IBM AIX 5.1
- IBM AIX 5.1.0 L
- IBM AIX 5.2
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