Detections
Analytics
SLES-12-030400 - The SUSE operating system must not allow interfaces to accept Internet Protocol version 4 (IPv4) Internet Control Message Protocol (ICMP) redirect messages by default.
Information
ICMP redirect messages are used by routers to inform hosts that a more direct route exists for a particular destination. These messages modify the host's route table and are unauthenticated. An illicit ICMP redirect message could result in a man-in-the-middle attack.Solution
Configure the SUSE operating system ignores IPv4 ICMP redirect messages by adding the following line to '/etc/sysctl.conf' (or modify the line to have the required value):net.ipv4.conf.default.accept_redirects = 0
Run the following command to apply this value:
# sysctl --system
See Also
https://dl.dod.cyber.mil/wp-content/uploads/stigs/zip/U_SLES_12_V3R4_STIG.zip
Item Details
Audit Name: DISA SLES 12 STIG v3r4
Category: CONFIGURATION MANAGEMENT
References: 800-53|CM-6b., CAT|II, CCI|CCI-000366, Rule-ID|SV-217292r991589_rule, STIG-ID|SLES-12-030400, STIG-Legacy|SV-92191, STIG-Legacy|V-77495, Vuln-ID|V-217292
Plugin: Unix
Control ID: e3a23be66b24b5e577ad220a4583a4beadfba12637b8a0290b6e6a8aadc6dc43