AIX7-00-001004 - AIX must limit the number of concurrent sessions to 10 for all accounts and/or account types.

Information

Operating system management includes the ability to control the number of users and user sessions that utilize an operating system. Limiting the number of allowed users and sessions per user is helpful in reducing the risks related to DoS attacks.

Solution

From the command prompt, execute the following command to set 'maxulogs=10' for the 'default:' stanza in the '/etc/security/user' file:
# chsec -f /etc/security/user -s default -a maxulogs=10

For each user account whose 'maxulogs' value is greater than '10', or their 'maxulogs' value is not set, or the values are set to '0', execute the following command to set 'maxulogs=10':
# chuser maxulogs=10 [user_name]

See Also

https://dl.dod.cyber.mil/wp-content/uploads/stigs/zip/U_IBM_AIX_7-x_V2R5_STIG.zip

Item Details

Category: ACCESS CONTROL

References: 800-53|AC-10, CAT|II, CCI|CCI-000054, Rule-ID|SV-215172r508663_rule, STIG-ID|AIX7-00-001004, STIG-Legacy|SV-101327, STIG-Legacy|V-91227, Vuln-ID|V-215172

Plugin: Unix

Control ID: fbd8aa973b85fd39f884475b0610c2944b521180edd8e1a9797fc234b4deb1f9