The Red Hat Enterprise Linux operating system must be configured so that the cryptographic hash of system files and commands matches vendor values.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-71855	RHEL-07-010020	SV-86479r3_rule		High

Description
Without cryptographic integrity protections, system command and files can be altered by unauthorized users without detection. Cryptographic mechanisms used for protecting the integrity of information include, for example, signed hash functions using asymmetric cryptography enabling distribution of the public key to verify the hash information while maintaining the confidentiality of the key used to generate the hash.

Description

Without cryptographic integrity protections, system command and files can be altered by unauthorized users without detection. Cryptographic mechanisms used for protecting the integrity of information include, for example, signed hash functions using asymmetric cryptography enabling distribution of the public key to verify the hash information while maintaining the confidentiality of the key used to generate the hash.

STIG	Date
Red Hat Enterprise Linux 7 Security Technical Implementation Guide	2018-11-28

Details

Check Text ( C-72087r2_chk )
Verify the cryptographic hash of system files and commands match the vendor values. Check the cryptographic hash of system files and commands with the following command: Note: System configuration files (indicated by a "c" in the second column) are expected to change over time. Unusual modifications should be investigated through the system audit log. # rpm -Va \| grep '^..5' If there is any output from the command for system files or binaries, this is a finding.

Check Text ( C-72087r2_chk )

Verify the cryptographic hash of system files and commands match the vendor values.

Check the cryptographic hash of system files and commands with the following command:

Note: System configuration files (indicated by a "c" in the second column) are expected to change over time. Unusual modifications should be investigated through the system audit log.

# rpm -Va | grep '^..5'

If there is any output from the command for system files or binaries, this is a finding.

Fix Text (F-78207r1_fix)
Run the following command to determine which package owns the file: # rpm -qf The package can be reinstalled from a yum repository using the command: # sudo yum reinstall Alternatively, the package can be reinstalled from trusted media using the command: # sudo rpm -Uvh