CCE-96083-1| Platform: cpe:/o:suse:suse_linux_enterprise_server:15 | Date: (C)2022-09-27 (M)2023-07-04 |
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.
Parameter:
[yes/no]
Technical Mechanism:
Fix:Configure the SUSE operating system to not accept IPv6 ICMP redirect messages by default by running the following command as an administrator:
> sudo sysctl -w net.ipv6.conf.default.accept_redirects=0
If "0" is not the system's default value, add or update the following line in "/etc/sysctl.d/99-stig.conf":
> sudo sh -c 'echo "net.ipv6.conf.default.accept_redirects=0" >> /etc/sysctl.d/99-stig.conf'
> sudo sysctl --system
| CCSS Severity: | CCSS Metrics: |
| CCSS Score : 7.6 | Attack Vector: ADJACENT_NETWORK |
| Exploit Score: 2.8 | Attack Complexity: LOW |
| Impact Score: 4.7 | Privileges Required: NONE |
| Severity: HIGH | User Interaction: NONE |
| Vector: AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H | Scope: UNCHANGED |
| | Confidentiality: LOW |
| | Integrity: LOW |
| | Availability: HIGH |
| | |
References: | Resource Id | Reference |
|---|
| SCAP Repo OVAL Definition | oval:org.secpod.oval:def:84507 |
