The traceroute file must not have an extended ACL.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-22437	GEN004010	SV-37468r1_rule	ECLP-1	Medium

Description
If an extended ACL exists on the traceroute executable file, it may provide unauthorized users with access to the file. Malicious code could be inserted by an attacker and triggered whenever the traceroute command is executed by authorized users. Additionally, if an unauthorized user is granted executable permissions to the traceroute command, it could be used to gain information about the network topology behind the firewall. This information may allow an attacker to determine trusted routers and other network information potentially leading to system and network compromise.

Description

If an extended ACL exists on the traceroute executable file, it may provide unauthorized users with access to the file. Malicious code could be inserted by an attacker and triggered whenever the traceroute command is executed by authorized users. Additionally, if an unauthorized user is granted executable permissions to the traceroute command, it could be used to gain information about the network topology behind the firewall. This information may allow an attacker to determine trusted routers and other network information potentially leading to system and network compromise.

STIG	Date
Red Hat Enterprise Linux 5 Security Technical Implementation Guide	2012-05-25

Details

Check Text ( C-36134r1_chk )
Check the permissions of the /bin/traceroute file. # ls -lL /bin/traceroute If the permissions include a '+', the file has an extended ACL. If the file has an extended ACL and it has not been documented with the IAO, this is a finding.

Fix Text (F-31379r1_fix)
Remove the extended ACL from the file. # setfacl --remove-all /bin/traceroute