Oracle Linux 5 Security Technical Implementation Guide

The Oracle Linux 5 Security Technical Implementation Guide (V2 R1) has 571 STIG checks. New to STIG checklists? Read What is a STIG checklist?, CKL vs CKLB, and STIG vs SCAP benchmark.

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Severity

Version

V2 · R1

CurrentPublished Fri Jan 22 2021

Files executed through a mail aliases file must have mode 0755 or less permissive.

Oracle Linux 5 Security Technical Implementation Guide

Assessment Title

Rule Text

Files executed through a mail aliases file must have mode 0755 or less permissive.

Description

Discussion Text

If a file executed through a mail aliases file has permissions greater than 0755, it can be modified by an unauthorized user and may contain malicious code or instructions potentially compromising the system.

New to STIG checklists? Read What is a STIG checklist? and CKL vs CKLB.

Objective

V-218537

Rule

SV-218537r603259_rule

Severity

medium

Rule Version

GEN004420

Documentable

false

IA Controls

NIST SP 800-53

Rev 5

Assessment Procedure

Check Text

If the "sendmail" package is not installed, this is not applicable.

Examine the contents of the /etc/aliases file.

Procedure:
# more /etc/aliases
Examine the aliases file for any referenced programs, which are specified with the pipe (|) symbol.

# ls -lL <file referenced from aliases>

Check the permissions for any paths referenced.
 
If any file referenced from the aliases file has a mode more permissive than 0755, this is a finding.

Implementation Procedure

Fix Text

Use the chmod command to change the access permissions for files executed from the alias file. 

For example:
# chmod 0755 filename

STIG check 375 of 571 in the Oracle Linux 5 STIG checklist

← Previous · V-218536Files executed through a mail aliases file must be group-owned by root, bin, sys, or system, and must reside within a directory group-owned by root, bin, sys, or system.Next · V-218538 →Files executed through a mail aliases file must not have extended ACLs.