STIGQter: STIG Summary: Apache Server 2.4 UNIX Server Security Technical Implementation Guide Version: 2 Release: 2 Benchmark Date: 22 Jan 2021:

Warning and error messages displayed to clients must be modified to minimize the identity of the Apache web server, patches, loaded modules, and directory paths.

DISA Rule

SV-214256r612240_rule

Vulnerability Number

V-214256

Group Title

SRG-APP-000266-WSR-000159

Rule Version

AS24-U1-000620

Severity

CAT II

CCI(s)

• CCI-001312 - The information system generates error messages that provide information necessary for corrective actions without revealing information that could be exploited by adversaries.

Weight

10

Fix Recommendation

Determine the location of the "HTTPD_ROOT" directory and the "httpd.conf" file:

# httpd -V | egrep -i 'httpd_root|server_config_file'
-D HTTPD_ROOT="/etc/httpd"
-D SERVER_CONFIG_FILE="conf/httpd.conf"

Use the "ErrorDocument" directive to enable custom error pages for 4xx or 5xx HTTP status codes.

ErrorDocument 500 "Sorry, our script crashed. Oh dear"
ErrorDocument 500 /cgi-bin/crash-recover
ErrorDocument 500 http://error.example.com/server_error.html
ErrorDocument 404 /errors/not_found.html
ErrorDocument 401 /subscription/how_to_subscribe.html

The syntax of the ErrorDocument directive is:

ErrorDocument <3-digit-code> <action>

Additional information:

https://httpd.apache.org/docs/2.4/custom-error.html

Check Contents

Determine the location of the "HTTPD_ROOT" directory and the "httpd.conf" file:

# httpd -V | egrep -i 'httpd_root|server_config_file'
-D HTTPD_ROOT="/etc/httpd"
-D SERVER_CONFIG_FILE="conf/httpd.conf"

If the "ErrorDocument" directive is not being used for custom error pages for "4xx" or "5xx" HTTP status codes, this is a finding.

# cat /<path_to_file>/httpd.conf | grep -i "ErrorDocument"

Vulnerability Number

V-214256

Documentable

False

Rule Version

AS24-U1-000620

Severity Override Guidance

Determine the location of the "HTTPD_ROOT" directory and the "httpd.conf" file:

# httpd -V | egrep -i 'httpd_root|server_config_file'
-D HTTPD_ROOT="/etc/httpd"
-D SERVER_CONFIG_FILE="conf/httpd.conf"

If the "ErrorDocument" directive is not being used for custom error pages for "4xx" or "5xx" HTTP status codes, this is a finding.

# cat /<path_to_file>/httpd.conf | grep -i "ErrorDocument"

Check Content Reference

M

Target Key

3996

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