Finding ID | Version | Rule ID | IA Controls | Severity |
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V-219281 | UBTU-18-010358 | SV-219281r853379_rule | Medium |
Description |
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In certain situations, software applications/programs need to execute with elevated privileges to perform required functions. However, if the privileges required for execution are at a higher level than the privileges assigned to organizational users invoking such applications/programs, those users are indirectly provided with greater privileges than assigned by the organizations. Some programs and processes are required to operate at a higher privilege level and therefore should be excluded from the organization-defined software list after review. Satisfies: SRG-OS-000326-GPOS-00126, SRG-OS-000327-GPOS-00127 |
STIG | Date |
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Canonical Ubuntu 18.04 LTS Security Technical Implementation Guide | 2023-11-21 |
Check Text ( C-21006r621650_chk ) |
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Verify the Ubuntu operating system audits the execution of privilege functions by auditing the "execve" system call. Check the currently configured audit rules with the following command: # sudo auditctl -l | grep execve -a always,exit -F arch=b64 -S execve -C uid!=euid -F euid=0 -F key=execpriv -a always,exit -F arch=b64 -S execve -C gid!=egid -F egid=0 -F key=execpriv -a always,exit -F arch=b32 -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 If the command does not return lines that match the example or the lines are commented out, this is a finding. Notes: For 32-bit architectures, only the 32-bit specific output lines from the commands are required. The '-k' allows for specifying an arbitrary identifier and the string after it does not need to match the example output above. |
Fix Text (F-21005r621651_fix) |
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Configure the Ubuntu operating system to audit the execution of all privileged functions. Add or update the following rules in the "/etc/audit/rules.d/stig.rules" file: -a always,exit -F arch=b64 -S execve -C uid!=euid -F euid=0 -F key=execpriv -a always,exit -F arch=b64 -S execve -C gid!=egid -F egid=0 -F key=execpriv -a always,exit -F arch=b32 -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 Notes: For 32-bit architectures, only the 32-bit specific entries are required. The "root" account must be used to view/edit any files in the /etc/audit/rules.d/ directory. In order to reload the rules file, issue the following command: # sudo augenrules --load |