|
|
7629ac |
diff --git a/shared/checks/oval/audit_rules_etc_passwd_open.xml b/shared/checks/oval/audit_rules_etc_passwd_open.xml
|
|
|
7629ac |
new file mode 100644
|
|
|
7629ac |
index 0000000000..fd5c3efb28
|
|
|
7629ac |
--- /dev/null
|
|
|
7629ac |
+++ b/shared/checks/oval/audit_rules_etc_passwd_open.xml
|
|
|
7629ac |
@@ -0,0 +1,96 @@
|
|
|
7629ac |
+<def-group>
|
|
|
7629ac |
+ <definition class="compliance" id="audit_rules_etc_passwd_open" version="1">
|
|
|
7629ac |
+ <metadata>
|
|
|
7629ac |
+ <title>Ensure auditd Collects Write Events to /etc/passwd</title>
|
|
|
7629ac |
+ <affected family="unix">
|
|
|
7629ac |
+ <platform>Red Hat Enterprise Linux 7</platform>
|
|
|
7629ac |
+ <platform>multi_platform_fedora</platform>
|
|
|
7629ac |
+ </affected>
|
|
|
7629ac |
+ <description>Audit rules about the write events to /etc/passwd</description>
|
|
|
7629ac |
+ </metadata>
|
|
|
7629ac |
+
|
|
|
7629ac |
+ <criteria operator="OR">
|
|
|
7629ac |
+
|
|
|
7629ac |
+
|
|
|
7629ac |
+ <criteria operator="AND">
|
|
|
7629ac |
+ <extend_definition comment="audit augenrules" definition_ref="audit_rules_augenrules" />
|
|
|
7629ac |
+ <criterion comment="audit rule to record write events to /etc/passwd" test_ref="test_audit_rules_etc_passwd_open_32bit_augenrules" />
|
|
|
7629ac |
+
|
|
|
7629ac |
+ <criteria operator="OR">
|
|
|
7629ac |
+
|
|
|
7629ac |
+ <extend_definition comment="64-bit system" definition_ref="system_info_architecture_64bit" negate="true" />
|
|
|
7629ac |
+
|
|
|
7629ac |
+ <criterion comment="audit rule to record write events to /etc/passwd" test_ref="test_audit_rules_etc_passwd_open_64bit_augenrules" />
|
|
|
7629ac |
+ </criteria>
|
|
|
7629ac |
+ </criteria>
|
|
|
7629ac |
+
|
|
|
7629ac |
+
|
|
|
7629ac |
+ <criteria operator="AND">
|
|
|
7629ac |
+ <extend_definition comment="audit auditctl" definition_ref="audit_rules_auditctl" />
|
|
|
7629ac |
+ <criterion comment="audit rule to record write events to /etc/passwd" test_ref="test_audit_rules_etc_passwd_open_32bit_auditctl" />
|
|
|
7629ac |
+
|
|
|
7629ac |
+ <criteria operator="OR">
|
|
|
7629ac |
+
|
|
|
7629ac |
+ <extend_definition comment="64-bit_system" definition_ref="system_info_architecture_64bit" negate="true" />
|
|
|
7629ac |
+
|
|
|
7629ac |
+ <criterion comment="audit rule to record write events to /etc/passwd" test_ref="test_audit_rules_etc_passwd_open_64bit_auditctl" />
|
|
|
7629ac |
+ </criteria>
|
|
|
7629ac |
+ </criteria>
|
|
|
7629ac |
+
|
|
|
7629ac |
+ </criteria>
|
|
|
7629ac |
+ </definition>
|
|
|
7629ac |
+
|
|
|
7629ac |
+
|
|
|
7629ac |
+ <constant_variable id="var_audit_rule_32bit_open_write_etc_passwd_regex" version="1" datatype="string" comment="audit rule arch and syscal">
|
|
|
7629ac |
+ <value>^[\s]*-a[\s]+always,exit[\s]+(?:-F[\s]+arch=b32[\s]+)(?:-S(?:[\s]+open[\s]+|(?:[\s]+|[,])open(?:[\s]+|[,])))[\S]*[\s]*(?:-F[\s]+a2&03)[\s]+(?:-F[\s]+path=/etc/passwd)[\s]+(?:-F\s+auid>={{{ auid }}}[\s]+)(?:-F\s+auid!=(unset|4294967295)[\s]+)(?:-k[\s]+|-F[\s]+key=)[\S]+[\s]*$</value>
|
|
|
7629ac |
+ </constant_variable>
|
|
|
7629ac |
+
|
|
|
7629ac |
+ <constant_variable id="var_audit_rule_64bit_open_write_etc_passwd_regex" version="1" datatype="string" comment="audit rule arch and syscal">
|
|
|
7629ac |
+ <value>^[\s]*-a[\s]+always,exit[\s]+(?:-F[\s]+arch=b64[\s]+)(?:-S(?:[\s]+open[\s]+|(?:[\s]+|[,])open(?:[\s]+|[,])))[\S]*[\s]*(?:-F[\s]+a2&03)[\s]+(?:-F[\s]+path=/etc/passwd)[\s]+(?:-F\s+auid>={{{ auid }}}[\s]+)(?:-F\s+auid!=(unset|4294967295)[\s]+)(?:-k[\s]+|-F[\s]+key=)[\S]+[\s]*$</value>
|
|
|
7629ac |
+ </constant_variable>
|
|
|
7629ac |
+
|
|
|
7629ac |
+
|
|
|
7629ac |
+
|
|
|
7629ac |
+ comment="defined audit rule must exist" id="test_audit_rules_etc_passwd_open_32bit_augenrules" version="1">
|
|
|
7629ac |
+ <ind:object object_ref="object_audit_rules_etc_passwd_open_32bit_augenrules" />
|
|
|
7629ac |
+ </ind:textfilecontent54_test>
|
|
|
7629ac |
+ <ind:textfilecontent54_object id="object_audit_rules_etc_passwd_open_32bit_augenrules" version="1">
|
|
|
7629ac |
+ <ind:filepath operation="pattern match">/etc/audit/rules\.d/.*\.rules</ind:filepath>
|
|
|
7629ac |
+ <ind:pattern operation="pattern match" var_ref="var_audit_rule_32bit_open_write_etc_passwd_regex" />
|
|
|
7629ac |
+ <ind:instance datatype="int" operation="greater than or equal">1</ind:instance>
|
|
|
7629ac |
+ </ind:textfilecontent54_object>
|
|
|
7629ac |
+
|
|
|
7629ac |
+
|
|
|
7629ac |
+ comment="defined audit rule must exist" id="test_audit_rules_etc_passwd_open_64bit_augenrules" version="1">
|
|
|
7629ac |
+ <ind:object object_ref="object_audit_rules_etc_passwd_open_64bit_augenrules" />
|
|
|
7629ac |
+ </ind:textfilecontent54_test>
|
|
|
7629ac |
+ <ind:textfilecontent54_object id="object_audit_rules_etc_passwd_open_64bit_augenrules" version="1">
|
|
|
7629ac |
+ <ind:filepath operation="pattern match">/etc/audit/rules\.d/.*\.rules</ind:filepath>
|
|
|
7629ac |
+ <ind:pattern operation="pattern match" var_ref="var_audit_rule_64bit_open_write_etc_passwd_regex" />
|
|
|
7629ac |
+ <ind:instance datatype="int" operation="greater than or equal">1</ind:instance>
|
|
|
7629ac |
+ </ind:textfilecontent54_object>
|
|
|
7629ac |
+
|
|
|
7629ac |
+
|
|
|
7629ac |
+
|
|
|
7629ac |
+
|
|
|
7629ac |
+
|
|
|
7629ac |
+ comment="defined audit rule must exist" id="test_audit_rules_etc_passwd_open_32bit_auditctl" version="1">
|
|
|
7629ac |
+ <ind:object object_ref="object_audit_rules_etc_passwd_open_32bit_auditctl" />
|
|
|
7629ac |
+ </ind:textfilecontent54_test>
|
|
|
7629ac |
+ <ind:textfilecontent54_object id="object_audit_rules_etc_passwd_open_32bit_auditctl" version="1">
|
|
|
7629ac |
+ <ind:filepath>/etc/audit/audit.rules</ind:filepath>
|
|
|
7629ac |
+ <ind:pattern operation="pattern match" var_ref="var_audit_rule_32bit_open_write_etc_passwd_regex" />
|
|
|
7629ac |
+ <ind:instance datatype="int" operation="greater than or equal">1</ind:instance>
|
|
|
7629ac |
+ </ind:textfilecontent54_object>
|
|
|
7629ac |
+
|
|
|
7629ac |
+
|
|
|
7629ac |
+ comment="defined audit rule must exist" id="test_audit_rules_etc_passwd_open_64bit_auditctl" version="1">
|
|
|
7629ac |
+ <ind:object object_ref="object_audit_rules_etc_passwd_open_64bit_auditctl" />
|
|
|
7629ac |
+ </ind:textfilecontent54_test>
|
|
|
7629ac |
+ <ind:textfilecontent54_object id="object_audit_rules_etc_passwd_open_64bit_auditctl" version="1">
|
|
|
7629ac |
+ <ind:filepath>/etc/audit/audit.rules</ind:filepath>
|
|
|
7629ac |
+ <ind:pattern operation="pattern match" var_ref="var_audit_rule_64bit_open_write_etc_passwd_regex" />
|
|
|
7629ac |
+ <ind:instance datatype="int" operation="greater than or equal">1</ind:instance>
|
|
|
7629ac |
+ </ind:textfilecontent54_object>
|
|
|
7629ac |
+
|
|
|
7629ac |
+</def-group>
|
|
|
7629ac |
diff --git a/linux_os/guide/system/auditing/auditd_configure_rules/audit_rules_etc_passwd_open.rule b/linux_os/guide/system/auditing/auditd_configure_rules/audit_rules_etc_passwd_open.rule
|
|
|
7629ac |
new file mode 100644
|
|
|
7629ac |
index 0000000000..6e4aabcbe8
|
|
|
7629ac |
--- /dev/null
|
|
|
7629ac |
+++ b/linux_os/guide/system/auditing/auditd_configure_rules/audit_rules_etc_passwd_open.rule
|
|
|
7629ac |
@@ -0,0 +1,36 @@
|
|
|
7629ac |
+documentation_complete: true
|
|
|
7629ac |
+
|
|
|
7629ac |
+prodtype: rhel7,fedora
|
|
|
7629ac |
+
|
|
|
7629ac |
+title: 'Record Events that Modify User/Group Information via open syscall - /etc/passwd'
|
|
|
7629ac |
+
|
|
|
7629ac |
+description: |-
|
|
|
7629ac |
+ The audit system should collect write events to /etc/passwd file for all users and root.
|
|
|
7629ac |
+ If the <tt>auditd</tt> daemon is configured
|
|
|
7629ac |
+ to use the <tt>augenrules</tt> program to read audit rules during daemon
|
|
|
7629ac |
+ startup (the default), add the following lines to a file with suffix
|
|
|
7629ac |
+ <tt>.rules</tt> in the directory <tt>/etc/audit/rules.d</tt>:
|
|
|
7629ac |
+ -a always,exit -F arch=b32 -S open -F a2&03 -F path=/etc/passwd -F auid>=1000 -F auid!=unset -F key=user-modify
|
|
|
7629ac |
+ If the <tt>auditd</tt> daemon is configured to use the <tt>auditctl</tt>
|
|
|
7629ac |
+ utility to read audit rules during daemon startup, add the following lines to
|
|
|
7629ac |
+ <tt>/etc/audit/audit.rules</tt> file:
|
|
|
7629ac |
+ -a always,exit -F arch=b64 -S open -F a2&03 -F path=/etc/passwd -F auid>=1000 -F auid!=unset -F key=user-modify
|
|
|
7629ac |
+
|
|
|
7629ac |
+rationale: |-
|
|
|
7629ac |
+ Creation of users through direct edition of /etc/passwd could be an indicator of malicious activity on a system.
|
|
|
7629ac |
+ Auditing these events could serve as evidence of potential system compromise.
|
|
|
7629ac |
+
|
|
|
7629ac |
+severity: medium
|
|
|
7629ac |
+
|
|
|
7629ac |
+references:
|
|
|
7629ac |
+ ospp@rhel7: FAU_GEN.1.1.c
|
|
|
7629ac |
+
|
|
|
7629ac |
+{{{ complete_ocil_entry_audit_syscall(syscall="open") }}}
|
|
|
7629ac |
+
|
|
|
7629ac |
+warnings:
|
|
|
7629ac |
+ - general: |-
|
|
|
7629ac |
+ Note that these rules can be configured in a
|
|
|
7629ac |
+ number of ways while still achieving the desired effect. Here the system calls
|
|
|
7629ac |
+ have been placed independent of other system calls. Grouping system calls related
|
|
|
7629ac |
+ to the same event is more efficient. See the following example:
|
|
|
7629ac |
+ -a always,exit -F arch=b32 -S open,openat,open_by_handle_at -F a2&03 -F path=/etc/passwd -F auid>=1000 -F auid!=unset -F key=user-modify
|
|
|
7629ac |
diff --git a/rhel7/profiles/ospp42-draft.profile b/rhel7/profiles/ospp42-draft.profile
|
|
|
7629ac |
index 63b7223731..86fb0ff2fb 100644
|
|
|
7629ac |
--- a/rhel7/profiles/ospp42-draft.profile
|
|
|
7629ac |
+++ b/rhel7/profiles/ospp42-draft.profile
|
|
|
7629ac |
@@ -161,3 +161,4 @@ selections:
|
|
|
7629ac |
- audit_rules_kernel_module_loading_modprobe
|
|
|
7629ac |
- audit_rules_kernel_module_loading_rmmod
|
|
|
7629ac |
- security_patches_up_to_date
|
|
|
7629ac |
+ - audit_rules_etc_passwd_open
|