STIGQter: STIG Summary: Solaris 10 X86 Security Technical Implementation Guide Version: 2 Release: 2 Benchmark Date: 22 Jan 2021:

The SMTP services SMTP greeting must not provide version information.

DISA Rule

SV-220100r603266_rule

Vulnerability Number

V-220100

Group Title

SRG-OS-000480

Rule Version

GEN004560

Severity

CAT III

CCI(s)

• CCI-000366 - The organization implements the security configuration settings.

Weight

10

Fix Recommendation

Ensure Sendmail or its equivalent has been configured to mask the version information. If necessary, change the O SmtpGreetingMessage line in the /etc/mail/sendmail.cf file as noted below.
O SmtpGreetingMessage=$j Sendmail $v/$Z; $b
Change it to:
O SmtpGreetingMessage= Mail Server Ready ; $b

Check Contents

Check for the Sendmail version being displayed in the greeting.

# telnet localhost 25

If a version number is displayed, this is a finding.

If telnet is unavailable for testing, check the value of the SmtpGreetingMessage parameter in the sendmail.cf file.

# grep SmtpGreetingMessage /etc/mail/sendmail.cf

If the value of the SmtpGreetingMessage parameter contains the $v or $Z macros, this is a finding.

Vulnerability Number

V-220100

Documentable

False

Rule Version

GEN004560

Severity Override Guidance

Check for the Sendmail version being displayed in the greeting.

# telnet localhost 25

If a version number is displayed, this is a finding.

If telnet is unavailable for testing, check the value of the SmtpGreetingMessage parameter in the sendmail.cf file.

# grep SmtpGreetingMessage /etc/mail/sendmail.cf

If the value of the SmtpGreetingMessage parameter contains the $v or $Z macros, this is a finding.

Check Content Reference

M

Target Key

4061

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