GEN000000-LNX001433 - The /etc/gshadow file must have mode 0400.

Information

The /etc/gshadow file is critical to system security and must be protected from unauthorized modification. The /etc/gshadow file contains a list of system groups and hashes for group passwords.

Solution

Change the mode of the /etc/gshadow file to 0400 or less permissive.
# chmod 0400 /etc/gshadow

See Also

http://iasecontent.disa.mil/stigs/zip/U_RedHat_5_V1R18_STIG.zip