GEN000000-LNX001434 - The /etc/gshadow file must not have an extended ACL.

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

Remove the extended ACL from the file.
# setfacl --remove-all /etc/gshadow

See Also

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