AlmaLinux OS 9 must audit uses of the "execve" system call.

Severity	Group ID	Group Title	Version	Rule ID	Date	STIG Version
medium	V-269146	SRG-OS-000327-GPOS-00127	ALMA-09-007280	SV-269146r1050028_rule	2025-02-20	1

Description
Misuse of privileged functions, either intentionally or unintentionally by authorized users, or by unauthorized external entities that have compromised information system accounts, is a serious and ongoing concern and can have significant adverse impacts on organizations. Auditing the use of privileged functions is one way to detect such misuse and identify the risk from insider threats and the advanced persistent threat. Satisfies: SRG-OS-000327-GPOS-00127, SRG-OS-000326-GPOS-00126

Description

Misuse of privileged functions, either intentionally or unintentionally by authorized users, or by unauthorized external entities that have compromised information system accounts, is a serious and ongoing concern and can have significant adverse impacts on organizations. Auditing the use of privileged functions is one way to detect such misuse and identify the risk from insider threats and the advanced persistent threat. Satisfies: SRG-OS-000327-GPOS-00127, SRG-OS-000326-GPOS-00126

ℹ️ Check
Verify that AlmaLinux OS 9 is configured to audit the execution of the "execve" system call with the following command: $ auditctl -l \| grep execve -a always,exit -F arch=b32 -S execve -C uid!=euid -F euid=0 -F key=execpriv -a always,exit -F arch=b64 -S execve -C uid!=euid -F euid=0 -F key=execpriv -a always,exit -F arch=b32 -S execve -C gid!=egid -F egid=0 -F key=execpriv -a always,exit -F arch=b64 -S execve -C gid!=egid -F egid=0 -F key=execpriv If the command does not return all lines, or the lines are commented out, this is a finding.

ℹ️ Check

Verify that AlmaLinux OS 9 is configured to audit the execution of the "execve" system call with the following command: $ auditctl -l | grep execve -a always,exit -F arch=b32 -S execve -C uid!=euid -F euid=0 -F key=execpriv -a always,exit -F arch=b64 -S execve -C uid!=euid -F euid=0 -F key=execpriv -a always,exit -F arch=b32 -S execve -C gid!=egid -F egid=0 -F key=execpriv -a always,exit -F arch=b64 -S execve -C gid!=egid -F egid=0 -F key=execpriv If the command does not return all lines, or the lines are commented out, this is a finding.

✔️ Fix
Configure AlmaLinux OS 9 to generate audit records upon successful/unsuccessful attempts to use the "sudo" command. Add the following to the "/etc/audit/rules.d/audit.rules" file: -a always,exit -F arch=b32 -S execve -C uid!=euid -F euid=0 -k execpriv -a always,exit -F arch=b64 -S execve -C uid!=euid -F euid=0 -k execpriv -a always,exit -F arch=b32 -S execve -C gid!=egid -F egid=0 -k execpriv -a always,exit -F arch=b64 -S execve -C gid!=egid -F egid=0 -k execpriv Merge the rules into /etc/audit/audit.rules: $ augenrules --load

✔️ Fix

Configure AlmaLinux OS 9 to generate audit records upon successful/unsuccessful attempts to use the "sudo" command. Add the following to the "/etc/audit/rules.d/audit.rules" file: -a always,exit -F arch=b32 -S execve -C uid!=euid -F euid=0 -k execpriv -a always,exit -F arch=b64 -S execve -C uid!=euid -F euid=0 -k execpriv -a always,exit -F arch=b32 -S execve -C gid!=egid -F egid=0 -k execpriv -a always,exit -F arch=b64 -S execve -C gid!=egid -F egid=0 -k execpriv Merge the rules into /etc/audit/audit.rules: $ augenrules --load