Check: AIX7-00-003096
IBM AIX 7.x STIG:
AIX7-00-003096
(in versions v3 r1 through v1 r1)
Title
AIX must set Stack Execution Disable (SED) system wide mode to all. (Cat II impact)
Discussion
DoS is a condition when a resource is not available for legitimate users. When this occurs, the organization either cannot accomplish its mission or must operate at degraded capacity. Managing excess capacity ensures that sufficient capacity is available to counter flooding attacks. Employing increased capacity and service redundancy may reduce the susceptibility to some DoS attacks. Managing excess capacity may include, for example, establishing selected usage priorities, quotas, or partitioning. Satisfies: SRG-OS-000142-GPOS-00071, SRG-OS-000480-GPOS-00227, SRG-OS-000433-GPOS-00192
Check Content
From the command prompt, run the following command to display SED systemwide mode: # sedmgr Stack Execution Disable (SED) mode: all SED configured in kernel: all If the above command shows a systemwide SED mode other than "all", this is a finding.
Fix Text
From the command prompt, run the following command to set the SED systemwide mode to select: # sedmgr -m all AIX has to be rebooted for the new SED mode to take effect.
Additional Identifiers
Rule ID: SV-215398r958528_rule
Vulnerability ID: V-215398
Group Title: SRG-OS-000142-GPOS-00071
Expert Comments
CCIs
| Number | Definition |
|---|---|
| CCI-000366 |
Implement the security configuration settings. |
| CCI-001095 |
Manage capacity, bandwidth, or other redundancy to limit the effects of information flooding types of denial-of-service attacks. |
| CCI-002824 |
Implement organization-defined controls to protect the system memory from unauthorized code execution. |