APACHE 2.2 Server for UNIX Security Technical Implementation Guide
Rules, Groups, and Values defined within the XCCDF Benchmark
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WG370
Group -
MIME types for csh or sh shell programs must be disabled.
Users must not be allowed to access the shell programs. Shell programs might execute shell escapes and could then perform unauthorized activities that could damage the security posture of the web s...Rule Medium Severity -
WG420
Group -
WG050
Group -
The web server password(s) must be entrusted to the SA or Web Manager.
Normally, a service account is established for the web server. This is because a privileged account is not desirable and the server is designed to run for long uninterrupted periods of time. The SA...Rule Medium Severity -
WG040
Group -
WG080
Group -
Installation of a compiler on production web server is prohibited.
The presence of a compiler on a production server facilitates the malicious user’s task of creating custom versions of programs and installing Trojan Horses or viruses. For example, the attacker’s ...Rule Medium Severity -
WA060
Group -
WA070
Group -
A private web server must be located on a separate controlled access subnet.
Private web servers, which host sites that serve controlled access data, must be protected from outside threats in addition to insider threats. Insider threat may be accidental or intentional but, ...Rule Medium Severity -
WG190
Group -
Web server software must be a vendor-supported version.
Many vulnerabilities are associated with older versions of web server software. As hot fixes and patches are issued, these solutions are included in the next version of the server software. Maintai...Rule High Severity -
WG200
Group -
WG220
Group -
WG130
Group -
All utility programs, not necessary for operations, must be removed or disabled.
Just as running unneeded services and protocols is a danger to the web server at the lower levels of the OSI model, running unneeded utilities and programs is also a danger at the application layer...Rule Low Severity -
WG270
Group -
WG280
Group -
The access control files are owned by a privileged web server account.
This check verifies that the key web server system configuration files are owned by the SA or Web Manager controlled account. These same files which control the configuration of the web server, and...Rule Medium Severity -
WA120
Group -
WG300
Group -
Web server system files must conform to minimum file permission requirements.
This check verifies that the key web server system configuration files are owned by the SA or the web administrator controlled account. These same files that control the configuration of the web se...Rule Medium Severity -
WG330
Group -
A public web server must limit email to outbound only.
Incoming E-mail has been known to provide hackers with access to servers. Disabling the incoming mail service prevents this type of attacks. Additionally, Email represents the main use of the Inter...Rule Medium Severity -
WG440
Group -
Monitoring software must include CGI or equivalent programs in its scope.
By their very nature, CGI type files permit the anonymous web user to interact with data and perhaps store data on the web server. In many cases, CGI scripts exercise system-level control over the ...Rule Medium Severity -
WA140
Group -
WG204
Group -
WG520
Group -
Web server and/or operating system information must be protected.
The web server response header of an HTTP response can contain several fields of information including the requested HTML page. The information included in this response can be web server type and ...Rule Low Severity -
WA230
Group -
WG355
Group -
Backup interactive scripts on the production web server are prohibited.
Copies of backup files will not execute on the server, but they can be read by the anonymous user if special precautions are not taken. Such backup copies contain the same sensitive information as ...Rule Low Severity -
Public web server resources must not be shared with private assets.
It is important to segregate public web server resources from private resources located behind the DoD DMZ in order to protect private assets. When folders, drives or other resources are directly s...Rule Medium Severity -
A public web server, if hosted on the NIPRNet, must be isolated in an accredited DoD DMZ Extension.
To minimize exposure of private assets to unnecessary risk by attackers, public web servers must be isolated from internal systems. Public web servers are by nature more vulnerable to attack from ...Rule Medium Severity -
Administrators must be the only users allowed access to the directory tree, the shell, or other operating system functions and utilities.
As a rule, accounts on a web server are to be kept to a minimum. Only administrators, web managers, developers, auditors, and web authors require accounts on the machine hosting the web server. Thi...Rule High Severity -
The web server’s htpasswd files (if present) must reflect proper ownership and permissions
In addition to OS restrictions, access rights to files and directories can be set on a web site using the web server software. That is, in addition to allowing or denying all access rights, a rule...Rule Medium Severity -
Administrative users and groups that have access rights to the web server must be documented.
There are typically several individuals and groups that are involved in running a production web server. These accounts must be restricted to only those necessary to maintain web services, review ...Rule Low Severity -
Web server content and configuration files must be part of a routine backup program.
Backing up web server data and web server application software after upgrades or maintenance ensures that recovery can be accomplished up to the current version. It also provides a means to determi...Rule Low Severity -
A web server must be segregated from other services.
The web server installation and configuration plan should not support the co-hosting of multiple services such as Domain Name Service (DNS), e-mail, databases, search engines, indexing, or streamin...Rule Medium Severity -
The Web site software used with the web server must have all applicable security patches applied and documented.
The IAVM process does not address all patches that have been identified for the host operating system or, in this case, the web server software environment. Many vendors have subscription services ...Rule Medium Severity -
All web server documentation, sample code, example applications, and tutorials must be removed from a production web server.
Web server documentation, sample code, example applications, and tutorials may be an exploitable threat to a web server. A production web server may only contain components that are operationally n...Rule High Severity -
The Timeout directive must be properly set.
The Timeout requirements are set to mitigate the effects of several types of denial of service attacks. Although there is some latitude concerning the settings themselves, the requirements attempt ...Rule Medium Severity -
Server side includes (SSIs) must run with execution capability disabled.
The Options directive configures the web server features that are available in particular directories. The IncludesNOEXEC feature controls the ability of the server to utilize SSIs while disabling...Rule High Severity -
The HTTP request message body size must be limited.
Buffer overflow attacks are carried out by a malicious attacker sending amounts of data that the web server cannot store in a given size buffer. The eventual overflow of this buffer can overwrite s...Rule Medium Severity -
The HTTP request header fields must be limited.
Buffer overflow attacks are carried out by a malicious attacker sending amounts of data that the web server cannot store in a given size buffer. The eventual overflow of this buffer can overwrite s...Rule Medium Severity -
Web server status module must be disabled.
The Apache mod_info module provides information on the server configuration via access to a /server-info URL location, while the mod_status module provides current server performance statistics. Wh...Rule Medium Severity -
The web server must be configured to explicitly deny access to the OS root.
The Apache Directory directive allows for directory specific configuration of access controls and many other features and options. One important usage is to create a default deny policy that does n...Rule Medium Severity -
The ability to override the access configuration for the OS root directory must be disabled.
The Apache OverRide directive allows for .htaccess files to be used to override much of the configuration, including authentication, handling of document types, auto generated indexes, access contr...Rule Medium Severity
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