SLES-12-020220 - The SUSE operating system must generate audit records for all account creations, modifications, disabling, and termination events that affect /etc/shadow.

Information

Once an attacker establishes initial access to a system, the attacker often attempts to create a persistent method of reestablishing access. One way to accomplish this is for the attacker to simply create a new account. Auditing of account creation mitigates this risk.

To address access requirements, many SUSE operating systems may be integrated with enterprise-level authentication/access/auditing mechanisms that meet or exceed access control policy requirements.

Satisfies: SRG-OS-000004-GPOS-00004, SRG-OS-000239-GPOS-00089, SRG-OS-000240-GPOS-00090, SRG-OS-000241-GPOS-00091, SRG-OS-000303-GPOS-00120, SRG-OS-000476-GPOS-00221

Solution

Configure the SUSE operating system to generate an audit record when all modifications to the '/etc/shadow' file occur.

Add or update the following rule to '/etc/audit/rules.d/audit.rules':

-w /etc/shadow -p wa -k account_mod

The audit daemon must be restarted for any changes to take effect.

# sudo systemctl restart auditd.service

See Also

https://dl.dod.cyber.mil/wp-content/uploads/stigs/zip/U_SLES_12_V2R7_STIG.zip

Item Details

Category: ACCESS CONTROL, AUDIT AND ACCOUNTABILITY

References: 800-53|AC-2(4), 800-53|AU-12c., CAT|II, CCI|CCI-000018, CCI|CCI-000172, CCI|CCI-001403, CCI|CCI-002130, CCI|CCI-002132, Rule-ID|SV-217207r603262_rule, STIG-ID|SLES-12-020220, STIG-Legacy|SV-92015, STIG-Legacy|V-77319, Vuln-ID|V-217207

Plugin: Unix

Control ID: e10bf74bc83b38e1c6b5a076e5e64e1bd25ab9626e16850b6193572709e4ae99